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NEMA Standards Pub lic ation EW 4-2009

Graphic Symbols for Arc Welding and Cutting Apparatus

Published by

National Electrical Manufacturers Ass ociation 1300 North 17th Street, Suite 1752Rosslyn, VA 22209

©2009 by National Electrical Manufacturers Association. All rights, including translation intoother languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American CopyrightConventions.



EW 4-2009 – 2 – © 2009, NEMA

CONTENTS

1 Scope............................................................................................................................ 6 2 References.................................................................................................................... 6

2.1

Normative references............................................................................................ 6

2.2 Informative references .......................................................................................... 6 3 Terms and definitions .................................................................................................... 9 4 Identification of parts and application ............................................................................10

4.1 General ...............................................................................................................10 4.2 Procedure for parts ..............................................................................................11 4.3 Selection of symbols............................................................................................11 4.4 Size of symbols ...................................................................................................12 4.5 Use of color .........................................................................................................12

5 Graphic symbols ...........................................................................................................12 6 How to combine graphic symbols ..................................................................................52

6.1 General ...............................................................................................................52 6.2 Procedure to combine symbols ............................................................................53 6.3 Summary.............................................................................................................55

Annex A (informat ive) Examples of Grouping of Symbols ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..57 A.1 Input voltage/power switch...................................................................................57 A.2 Use of remote receptacles and selector switches..................................................57 A.3 Weld start and stop push buttons .........................................................................58 A.4 Panel indicator lights ...........................................................................................58 A.5 Output (contactor) switch .....................................................................................59 A.6 Arc force control potentiometer . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...59 A.7 Terminals and selector switch on AC/DC welder ...................................................60 A.8 Process switch (SMAW-GTAW-GMAW)................................................................60 A.9 Ignition switch on engine driven welder ................................................................61 A.10 Idle switch ...........................................................................................................61 A.11 Start/run switch ...................................................................................................62 A.12 Process selection for GMAW................................................................................62 A.13 Control potentiometers for GMAW........................................................................63 A.14 Switched settings for GMAW................................................................................63 A.15 Setting pulsing parameters using digital display....................................................64 A.16 Setting pulsed GMAW parameters with digital display ...........................................64 A.17

AC balance control with balanced position used for the SMAW process .. ... ... ... ... ..65



EW 4-2009 – 3 – © 2009, NEMA

FOREWORD

This publication provides manufacturers and users of arc welding and cutting equipment with asystem of graphic symbols that can be used and recognized throughout the arc welding andcutting industry. These graphic symbols communicate the required message independent of any

language, thus minimizing difficulties that could arise when equipment is used by operatorsspeaking different languages.

There are three major factors contributing to the need for graphic symbols: 1) large numbers of functionally illiterate people in the labor force; 2) large numbers of non-English speaking U.S.residents; and 3) the diversity of the global marketplace. In an effort to communicate with asmany people as possible, graphic symbols have been developed. This publication standardizesthose graphic symbols used on arc welding and cutting equipment, explains their direct meaning,and shows their proper use.

The work to develop graphic symbols that provide a clear and practical means of communicatingto operators of arc welding and cutting equipment the function and use of equipment controlsunique to the arc welding and cutting industry has been in progress for a number of decades.

In 1957, the International Organization for Standardization Technical Committee 44 (Welding)(ISO/TC 44) began work on the rating of manual arc welding equipment. This led to thepublication of ISO Recommendation R700.

In 1976, Subcommittee SC 4 (Arc Welding Equipment) of ISO/TC 44 proposed a revision of ISOR700 that incorporated graphic symbols for the identification of equipment control functions anddescription of welding processes.

In 1977, the NEMA Arc Welding Apparatus Graphic Symbols Committee, consisting of representatives of arc welding equ ipment manufacturers, was formed to review the ISO symbols.

In 1982, the first edition of NEMA Standards Publication EW 4 was published. In its preparation,the Committee also gave consideration to the work of other organizations such as theInternational Organization for Standardization (ISO), the American Welding Society (AWS), theSociety of Automotive Engineers (SAE), the American Society of Mechanical Engineers (ASME),as well as the symbols being used by U.S. and European welding and cutting equipmentmanufacturers. Many of the symbols were adopted directly from the work of these organizations,and credit was given to them in EW 4. As a result, the Committee proposed additional symbols for the identification and use of equipment controls that were captured in the first edition of NEMAEW 4. The first edition contained 92 of the most commonly used symbols for welding and cuttingproducts.

In 1984, Technical Committee ISO/TC 145 published ISO 7000 incorporating the graphic symbolsfrom R700 and a 1979 amendment that provided symbols for all kinds of equipment. In 1989, ISO7000 was revised and published.

In 1988, NEMA EW 4 was rescinded.

In 1994, a new version of EW 4 was published. As in the past, this edition gave a great deal of consideration to the work of other organizations, both national and international. Where symbolswere used directly from another source, credit was given to that document. This edition addedinformation on how to combine graphic symbols as well as additional and more current examples



EW 4-2009 – 4 – © 2009, NEMA

of their use. This edition contained 185 symbols to accommodate more complex products andprocesses.

Noting advancements in technology and equipment, changes in the global marketplace, andgreater need for harmonization with internationally used graphic symbols, a revision to EW 4

began in 2004 leading to the publication of this document.

This 2009 edition of EW 4 has three main enhancements. First, it adds symbols from Annex L of IEC 60974-1. Secondly, this revision uses an international style acceptable to NEMA draftingprinciples that harmonize with ISO/IEC documentation methods. Thirdly, where multiple symbolsfor the same control, function, or item exist, they are added and shown together to aid ease of use and clarity. As a result, this edition contains 217 symbols to address the expanded needs of users.

This publication will be reviewed periodically by the NEMA Arc Welding Section for the purpose of updating graphic symbols to reflect advancing technology or the latest graphic symbolapplications. Please address any comments or questions regarding this publication to:

Vice President, Technical ServicesNational Electrical Manufacturers Association1300 North 17th Street, Suite 1752Rosslyn, VA 22209

Comments from parties that have an interest in, or responsibility for, the purchase, application,use, and inspection of arc welding and cutting equipment were considered throughout the revisionof this publication, and led to a number of changes from the previous edition. When major changes to this publication are proposed, these parties will again have the opportunity toparticipate in NEMA committee proceedings in order to review and comment on the revision.

The artwork for the graphic symbols shown in this publication is stored in NEMA’s electronic files.

More information on downloading these files free of charge can be found on the EW 4 webpage athttp://www.nema.org/stds/ew4.cfm.



EW 4-2009 – 5 – © 2009, NEMA

NOTICE AND DISCLAIMER

The information in this publication was considered technically sound by the consensus of personsengaged in the development and approval of the document at the time it was developed.Consensus does not necessarily mean that there is unanimous agreement among every person

participating in the development of this document.

NEMA standards and guideline publications, of which the document contained herein is one, aredeveloped through a voluntary consensus standards development process. This process bringstogether volunteers and/or seeks out the views of persons who have an interest in the topiccovered by this publication. While NEMA administers the process and establishes rules topromote fairness in the development of consensus, it does not write the document and it does notindependently test, evaluate or verify the accuracy or completeness of any information or thesoundness of any judgments contained in its standards and guideline publications.

NEMA disclaims liability for any personal injury, property or other damages of any naturewhatsoever, whether special, indirect, consequential or compensatory, directly or indirectlyresulting from the publication, use of, application, or reliance on this document. NEMA disclaimsand makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information inthis document will fulfill any of your particular purposes or needs. NEMA does not undertake toguarantee the performance of any individual manufacturer’s or seller’s products or services byvirtue of this standard or guide.

In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity. Nor is NEMA undertakingto perform any duty owed by any person or entity to someone else. Anyone using this documentshould rely on his or her own independent judgment or, as appropriate, seek the advice of acompetent professional in determining the exercise of reasonable care in any givencircumstances. Information and other standards on the topic covered by this publication may beavailable from other sources, which the user may wish to consult for additional views or information not covered by this publication.

NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test or inspect products, designs or installations for safetyor health purposes. Any certification or other statement of compliance with any health or safety– related information in this document shall not be attributable to NEMA and is solely theresponsibility of the certifier or maker of the statement.



EW 4-2009 – 6 – © 2009, NEMA

1 Scope

This publication provides graphic symbols for arc welding and cutting equipment, including thosesymbols used to identify controls, indicators, connection points, operations, functions, commands,

and processes. This publication does not cover graphic symbols used to alert personnel of immediate or potential personal hazards in the use o f the equipment.

2 References

2.1 Normative references

Each publication listed below is directly referenced in subsequent clauses of this publication, andhas a corresponding footnote identifying the publisher and, where available, information on howto order the publication. It is recommended that the latest edition be requested when ordering astandard.

IEC 60027-1, Letter symbols to be used in electrical technology — Part 1: General1

IEC 60417-1, Graphical Symbols for use on equipment — Part 1: Overview and application2

IEC 60974-1, Arc welding equipment — Part 1: Welding power sources1

ISO 3767-1, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —Symbols for operator controls and other displays — Part 1: Common symbols3

ISO 7000, Graphical symbols for use on equipment — Index and synopsis2

ISO 17846, Welding and allied processes — Health and safety — Wordless precautionary labelsfor equipment and consumables used in arc welding and cutting

3

SAE International, Handbook4

2.2 Informative references

Each publication listed below has a corresponding footnote identifying the publisher and, whereavailable, information on how to order the publication. It is recommended that the latest edition berequested when ordering a standard.

ANSI/IEC 60974-1, Arc welding equipment — Part 1: Welding power sources5

——————— 1

Published by, and available from, the International Electrotechnical Commission, 3 rue de Varembé, Geneva 1120,Switzerland; website: www.iec.ch

2 IEC 60417 and ISO 7000 are published in a single volume, available from the International ElectrotechnicalCommission, 3 rue de Varembé, Geneva 1120, Switzerland; website: www.iec.ch

3 Published by, and available from, International Organization for Standardization (ISO), 1 rue de Varembé, Geneva1120, Switzerland; website: www.iso.org

4 Published by, and available from, SAE International, 400 Commonwealth Drive, Warrendale, PA 15906; website:www.sae.org; phone: 1-877-606-7323

5 Published by National Electrical Manufacturers Association and available from Global Engineering Documents;website: global.ihs.com; phone: 1-877-413-5184



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ANSI Z49.1, Safety in Welding and Cutting6

ANSI Z129.1, American Nat ional Standard for Hazardous Industria l Chemicals — PrecautionaryLabeling7

ANSI Z535.1, Safety Color Code8

ANSI Z535.2, Environmental and Facility Safety Signs8

ANSI Z535.3, Criteria for Safety Symbols8

ANSI Z535.4, Product Safety Signs and Labels8

ANSI Z535.5, Safety Tags and Barricade Tapes (for Temporary Hazards)8

ANSI Z535.6, Product Safety Information in Product Manuals, Instructions, and Other CollateralMaterials

8

ASME Y14.5M, Dimensioning and Tolerancing9

AWS A3.0, Standard Welding Terms and Definitions6

CAN/CSA E60974-1-00 (R2005), Arc welding equipment — Part 1: Welding power sources10

CAN/CSA E60974-5-03, Arc welding equipment — Part 5: Wire Feeders10

CAN/CSA E60974-7-02 (R2007), Arc welding equipment — Part 7: Torches10

CSA C22.2 No. 60, Arc Welding Equipment10

DIN 30 600, Graphic Symbols (Bildzeichen Übersicht)11

FMC, Product Safety Sign and Label System12

——————— 6 Published by, and available from, American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126; website:

www.aws.org; phone: 1-800-443-9353

7 Available from American National Standards Institute, 11 West 42nd Street, New York, NY 10036; website:www.ansi.org; phone: 1-212-642-4980

8 Published by National Electrical Manufacturers Association and available through Global Engineering Documents;website: global.ihs.com; phone: 1-877-413-5184

9 Published, and available from, ASME International, Three Park Avenue, New York, NY 10016-5990; website:www.asme.org; phone: 1-800-843-2763

10 Published by, and available from, Canadian Standards Association, 5060 Spectrum Way, Mississauga, Ontario L4W5N6, Canada; website: www.csa.ca; phone: 1-800-463-6727

11 Published by Deutsche Institut für Normung and available from Beuth Verlag GmbH, Burggrafenstraße 6, 10787Berlin, Germany; website: www.beuth.de

12 Published by FMC Corporation, Corporate Technology Center, P.O. Box 580, Santa Clara, CA 95052



EW 4-2009 – 8 – © 2009, NEMA

Henry Dreyfuss, Symbol Sourcebook: An Authoritative Guide to International Graphic Symbols13

William K. Horton, The Icon Book: Visual Symbols for Computer Documentation14

IEC 80416-1, Basic principles for graphical symbols for use on equipment — Part 1: Creation of

symbol originals15

IEEE 315, Graphic Symbols for Electrical and Electronics Diagrams (Including ReferenceDesignation Class Designation Letters)16

ISO 3461-1, General principles for the creation of graphical symbols — Part 1: Graphical symbolsfor use on equipment17

ISO 3864-2, Graphical symbols — Safety colours and safety signs — Part 2: Design principles for product safety labels

17

ISO 3864-3, Graphical symbols — Safety colours and safety signs — Part 3: Design principles for graphical symbols for use in safety signs

17

NEMA EW 1, Electric Arc Welding Power Sources18

NEMA EW 6, Guidelines for Precautionary Labeling of Arc Welding and Cutting Products18

NFPA 70, National Electrical Code19

OSHA 29 CFR 1910, Occupational Safety and Health Standards20

UL 551, Transformer-type Arc Welding Machines21

UL 2201, Standard for Portable Engine-Generator Assemblies22

Westinghouse MB 3662, Product Safety Label Handbook23

——————— 13 Published by John Wiley and Sons Inc. (last publication date: May 1984)

14 Published by John Wiley and Sons Inc. (last publication date: 1994)

15 Published by, and available from, International Electrotechnical Commission, 3 rue de Varembé, Geneva 1120,Switzerland; website: www.iec.ch

16 Published by, and available from, IEEE, 445 Hoes Lane, Piscataway, NJ 08854; website: www.ieee.org; phone: 1-800-701-4333

17 Published by, and available from, International Organization for Standardization (ISO), 1 rue de Varembé, Geneva1120, Switzerland; website: www.iso.org

18 Published by National Electrical Manufacturers Association and available through Global Engineering Documents;

website: global.ihs.com; phone: 1-877-413-5184

19 Published by, and available from, National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169;website: www.nfpa.org; phone: 1-800-344-3555

20 Published by, and available from, Occupational Health & Safety Administration, U.S. Department of Labor; website:www.osha.gov; phone 1-800-321-6742

21 Published by Underwriters Laboratories and available from Comm 2000; website: www.comm-2000.com; phone: 1-800-853-3503

22 Draft developed by Underwriters Laboratories based on an Outline for Investigation, Subject 2201

23 Published by Westinghouse Electric Corporation, Gateway Center, Pittsburgh, PA 15222



EW 4-2009 – 9 – © 2009, NEMA

3 Terms and definitions

NOTE The following terms have definitions unique to this publication. Other terms found in this publication, such asfor welding processes, are used as defined in AWS A3.0.

3.1connection pointplace such as output terminal or receptacle where electrical connections are made (can bemechanical, water, or gas connections)

3.2controldevice whose movement causes changes in equipment operation or status such as rheostats,potentiometers, or switches

3.3downslopetime during which process parameters change from one welding or cutting value to a second

lower value

3.4functionaction that a control causes to happen or not to happen by adjusting the control

3.5graphic symbolpictogramgraphical symbolpictorialpicture used to replace or supplement one or more written words in order to transmit a messageor to represent an object, concept, or function

3.6indicator device that shows or indicates something such as water level or temperature level

3.7inputinput power requirements of equipment including volts, amps, phase, and hertz (frequency)

3.8memorycapability of the equipment, usually microprocessor-based, to store one or more parameters for

recall at a later time

3.9modevolt-ampere curve type of operation such as CC (constant current, drooper) or CV (constantvoltage, flat)



EW 4-2009 – 10 – © 2009, NEMA

3.10outputrated output of the equipment at a specific load, and usually expressed in amperes and volts at aspecific duty cycle

3.11plasma arc gougingplasma arc cutting process variation that uses a constricted arc and removes the molten metalwith a high velocity jet of ionized gas issuing from the constricting orifice to form a bevel or groove

3.12programsingle program selected in a multi-program device, usually found on microprocessor-controlledtype of equipment

3.13sequence

various parts of a process cycle such as preflow, initial, weld, crater, final, and postflow

3.14sloperising or falling areas of a process cycle

3.15sourceplace, document, or group from which the symbol element(s) were taken or originated

3.16unit of measurement

unit used to describe a quantityEXAMPLE For current as the quantity, ampere is the unit of measurement.

3.17upslopetime during which the process parameters change from one welding or cutting value to a secondhigher value

4 Identification of parts and application

4.1 General

The symbols are normally placed on equipment to instruct as to its use and operation. In addition,there may be warnings or limits as to use of some controls. In some cases, symbols may be usedto identify the complete package or subassemblies.

The user of equipment can determine the meaning of symbols by referring to Clause 5. Symbolsmay be accompanied by words and phrases until such time that universal recognition is achieved.Words or phrases, to be used in addition to the symbols, are to be selected by the manufacturer (see Annex A for typical examples). The process of selecting symbols for a particular applicationis simplified by the procedure in 4.2.



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4.2 Procedure for parts

The following steps should be taken for parts needing identification that can be expressed withsymbols:

a) list all existing parts and group similar parts together in tabular form; for example: switches,receptacles, and terminals;

b) list the exact function of each part, for example:

1) switch – to control input power;

2) rheostat – to control welding current;

3) lamp – to indicate low oil pressure when lit;

4) terminal – to identify the work lead connection point;

c) list the direction of movement and result of such movement associated with the part; for example:

1) rotate clockwise to increase;

2) push up for ON; down for OFF;3) pull out to STOP;

d) list the command associated with the part; for example: do not switch while welding

e) list the quantity and unit of measurement related to the part; for example:

1) 0-10 dial, in seconds;

2) 0-10 dial, no meaning to graduations;

f) list all items (words or phrases) that are not physical parts, but for which symbols are to beselected; for example: water, high frequency, positive polarity;

g) review the preceding steps to ensure that all physical parts have some distinguishingdescription that clearly states, in an understandable manner, exactly what is to berepresented by graphic symbols; it is important that the language description be clear before

attempting to select symbols.

4.3 Selection of symbols

A symbol may exist that exactly transmits the requirements worked out in the preceding sections.However, it is usually necessary to use a building block approach and use combinations of symbols as required.

Refer to Tables 2 and 3 which list the function keyword or phrase columns and correspondinggraphic symbol number. Select symbols by looking at both the symbol and the function, keywordor phrase columns. List the symbol numbers opposite the parts and items listed from theprocedure described in 4.2. Use this composite list as a guide for preparing the artwork for labelsor screening process. Consistent positioning of each symbol around the device promotes overall

readability.

Alternative methods of applying symbols are shown in the examples in Annex A. Select themethod that best identifies the control or component, how it is to be used, and what is indicated,as needed for the application.



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4.4 Size of symbols

For the application of the symbols it may be necessary either to reduce or to enlarge the originalto a suitable size. In the case of symbols composed of several graphic elements, or whenreducing to minimum height, check that clear identification is still possible and legibility isadequate.

Recommended minimum symbol size is 1/4 inch (6.3 mm) square. It will be necessary to usesound judgment when size reduction is done. Show the proposed size to a typical targetaudience, and carefully check their responses. Consider available light, user distance, andpossible operating conditions as factors during size selection also. Always retain adequate linethickness for reproduction process and user visibility.

4.5 Use of color

In general, the graphic form of a symbol reproduced in black on white or white on black should besufficient for its identification. However, there may be cases in which the meaning of the symbolmay depend on the application of one or more colors. In these cases the relevant colors are

normally specified in the standard regulating or advising that specific area of concern. For thepurposes of this standard and these symbols, adequate contrast between symbol and backgroundis most important. As long as the symbol is clearly delineated and fully legible, actual color selection is not mandatory. Be aware that certain colors, such as red, orange, and yellow, aredesignated safety alerting colors according to ANSI Z535. If necessary for legibility when reducedin size, the symbol may be filled.

5 Graphic symbols

The symbols shown in Table 1 are for use on arc welding and cutting apparatus, except for therating plate; see IEC 60974-1 for symbols used on rating plates. Table 1 presents the symbolsalong with its reference number; function, keyword or phrase, application and source.

NOTE 1 The symbols shown in Table 1 may differ slightly in terms of shading from those shown in the sourcedocument. Table 1 contains all symbols found in Annex L of IEC 60974-1 except those symbols that differ only slightlyfrom symbols from other sources.

NOTE 2 Some functions, keywords, or phrases in Table 1 show more than one symbol. The order in which the symbolsappear imply no order of importance or preference. It is assumed that the user will determine his own importance or preference according to factors such as intended product use and product certification requirements.

Table 2 provides an alphabetical listing by function, keyword or phrase with correspondingsymbol numbers. Table 3 provides a numerical listing by symbol number with correspondingfunction, keyword or phrase.



EW 4-2009 – 13 – © 2009, NEMA

Table 1 ― Graphic symbols

NO. SYMBOLFUNCTION, KEYWORD OR

PHRASEAPPLICATION SOURCE(S)

a

1 AMPERAGESignifies amperage or amperage control

IEC 60027-1-67

2 VOLTAGESignifies voltage or voltage control

IEC 60027-1-56

3 HERTZSignifies cycles per second

IEC 60027-1-18

4 FREQUENCY Signifies frequencyIEC 60027-1-

18

5 SECONDSSignifies time inseconds

IEC 60027-1-12

6 TIME Signifies timeIEC 60027-1-

12

7 NEGATIVESignifies negativeswitch position or connection

IEC 60417-1-5006

IEC 60974-1-21



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a

8 POSITIVESignifies positive switch

position or connection

IEC 60417-1-5005

IEC 60974-1-20

9 DIRECT CURRENT (DC) Signifies direct current

IEC 60417-1-5031

IEC 60974-1-75 is similar

10 ALTERNATING CURRENT

(AC)

Signifies alternating

current

IEC 60417-1-5032


11 ALTERNATING CURRENT(AC) AND DIRECTCURRENT (DC)

Signifies alternatingcurrent and directcurrent

IEC 60417-1-5033

IEC 60974-1-77

12 EARTH (GROUND)Signifies the earth

(ground) connection

IEC 60417-1-5017

IEC 60974-1-22

13PROTECTIVE EARTH(GROUND)

Signifies the equipmentconnection point for theprotective earth ground

IEC 60417-1-5019

IEC 60974-1-23

14 FRAME OR CHASSIS

Signifies the frame or

chassis connection

IEC 60417-1-5020

IEC 60974-1-24

15 FUSE Signifies a fuse

IEC 60417-1-5016

IEC 60974-1-25



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PHRASE APPLICATION SOURCE(S)

a

16 INPUT PLUG AND CORDSignifies an inputpower plug and cord

that connects to line

derived from

symbol 17

17 LINE CONNECTIONSignifies a lineconnection

IEC 60417-1-5939

18 AUXILIARY POWERSignifies an auxiliary

power outlet

derived from

symbol 17

19 CIRCUIT BREAKERSignifies a circuitbreaker in an electricalcircuit

ANSI/NEMA

20RECEPTACLE RATING –

AUXILIARY POWER

Signifies the receptacle

rating ANSI/NEMA

21 SINGLE PHASE Signifies single phasederived fromIEC 60974-1-

76

22 THREE PHASE Signifies three phase

derived from

IEC 60974-1-76

23 TRANSFORMER Identifies a transformer

IEC 60417-1-5156

IEC 60974-1-78

1



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a

24SINGLE PHASE

TRANSFORMER

Signifies a single phase

transformer

derived from

IEC 60974-1

25SINGLE PHASETRANSFORMER RECTIFIER

Signifies a single phasetransformer and rectifier

derived fromIEC 60974-1

26THREE PHASE

TRANSFORMER RECTIFIER

Signifies a three phase

transformer and rectifier

IEC 60974-1,

Annex L.4

27 GENERATOR Identifies a generator

ISO 7000-0147

IEC 60974-1-79

28DIRECT CURRENTGENERATOR WITHCOMMUTATOR

Signifies a direct currentgenerator withcommutator

IEC 60974-1,

15.3

29SINGLE PHASE

ALTERNATORSignifies a single phasealternator

IEC 60974-1,15.3

30

THREE PHASE ALTERNATOR

WITH RECTIFIER

Signifies a three phase

alternator with rectifier

derived from

IEC 60974-1,15.3

31THREE PHASE MOTORTHREE PHASE ALTERNATORRECTIFIER

Signifies a motor-driventhree phase alternator and rectifier

IEC 60974-1,15.3

1~



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a

32 MOTORIdentifies an electric

motor

ISO 7000-0147

IEC 60974-1-81

33 MOTOR GENERATORSignifies a motor generator

IEC 60974-1,15.3

34

SINGLE PHASETRANSFORMER AC AND

RECTIFIED DC POWERSOURCE

Signifies a single phasetransformer with single

phase AC output andrectified DC output

IEC 60974-1,

15.3

35 INVERTERIdentifies a frequencyconversion stagefunction

IEC 60974-1-82

36SINGLE PHASE STATICFREQUENCY CONVERTERTRANSFORMER RECTIFIER

Signifies a single phasestatic frequency

converter, transformer and rectifier

IEC 60974-1,

15.3

37THREE PHASE STATICFREQUENCY CONVERTERTRANSFORMER RECTIFIER

Signifies a three phasestatic frequencyconverter, transformer and rectifier

IEC 60974-1,15.3

38 DC/AC CONVERTER

Identifies a DC/ACconverter and its

associated terminalsand controls

IEC 60417-1-5194

IEC 60974-1-83

39 DANGEROUS VOLTAGESignifies a dangerousvoltage

IEC 60417-1-5036



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a

40

SUITABLE FOR WELDING IN AN ENVIRONMENT WITH

INCREASED RISK OFELECTRIC SHOCK

Identifies a weldingpower source suitablefor welding in an

environment with anincreased risk of electric shock

IEC 60974-1-

84

41 CLASS II EQUIPMENTIdentifies class IIequipment

IEC 60417-1-5172

IEC 60974-1-85

42 GAS SUPPLY Signifies a gas supplyIEC 60974-1-

31

43 GAS TYPESignifies the type of gas, such as Argon,CO2

derived fromIEC 60974-1-

31

44 MATERIAL TYPESignifies the type of material to be weldedor cut

ANSI/NEMA

45 MATERIAL THICKNESSSignifies the thicknessof the material to bewelded or cut

ANSI/NEMA

46 DIAMETER mm (in)

Signifies diameter,

such as diameter of wire or electrode

derived from

IEC 60974-1

47 INPUT Signifies input

IEC 60417-1-5034

IEC 60974-1-39



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a

48 OUTPUT Signifies output

IEC 60417-1-5035

IEC 60974-1-40

49INPUT POWER OR INPUTVOLTAGE

Signifies either inputpower or input voltage

IEC 60974-1,L.5 (derived

from IEC60417-1-

5034)

50 WATER (COOLANT) INPUTSignifies water

(coolant) input

IEC 60974-1,

L.4

51 WATER (COOLANT) OUTPUTSignifies water (coolant) output

derived fromsymbol 50

52 GAS INPUT Signifies gas inputderived fromsymbols 42

and 47

53 GAS OUTPUT Signifies gas outputderived from

symbol 42and 48

54 OFF

Signifies an OFF

position of a switch or control

IEC 60417-1-5008 and IEC

60974-1-3 aresimilar

55 ONSignifies an ONposition of a switch or control

IEC 60417-1-5007 and IEC60974-1-2 are

similar

IEC 609

v



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a

56INCREASE/DECREASE OFQUANTITY (ROTATING;

NUMBER OF POSITIONS)

Signifies an increase/decrease of quantity

with a rotary control insteps

derived from

symbol 57

57INCREASE/DECREASE OFQUANTITY (ROTATING; WITHOFF POSITIONS)


IEC 60974-1,L.4

58INCREASE/DECREASE OF

QUANTITY (ROTATING)


with a rotary controlcontinuously variable

derived from

symbol 57

59INCREASE/DECREASE OFQUANTITY (LINEAR,NUMBER OF POSITIONS)

Signifies an increase/decrease of a quantity(linear) in coarse stepsusually by a switch

derived fromsymbol 60

60INCREASE/DECREASE OF

QUANTITY (LINEAR)

Signifies an increase/decrease of a quantity(linear) continuouslyvariable usually by apotentiometer

IEC 60974-1-

1

61DIRECTION OFCONTINUOUS ROTATION(CLOCKWISE)

Signifies continuousclockwise rotarymotion; for counter-clockwise motionsymbol is reversed

ISO 7000-0004


62

DIRECTION OF

CONTINUOUS ROTATION(COUNTER-CLOCKWISE)

Signifies continuouscounter-clockwiserotary motion; for

counter-clockwisemotion symbol isreversed

IEC 60974-1-

19 is similar

63DO NOT SWITCH WHILEWELDING

Signifies that switchingwhile welding isprohibited

partiallyderived fromISO 7000 -

0459



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a

64 PANEL/LOCAL

Signifies panel/localfunction or switch suchas a switch to change

between a local andremote control

IEC 60974-1-

39

65 DIRECTIONAL ARROW Signifies a directionderived fromsymbols 61

and 62

66 REMOTESignifies a remotecontrol connection or function

ISO 7000-0093

IEC 60974-1-37

67 PUSHBUTTON SWITCH (IN)Signifies the IN positionof a push button control

IEC 60417-1-5268


68PUSHBUTTON SWITCH

(OUT)

Signifies the OUTposition of a pushbutton control

IEC 60417-1-5269


69 START OF ACTIONSignifies the start (of action) function or control

IEC 60417-1-5104

70 STOP OF ACTION

Signifies the stop (of

action) function or control

IEC 60417-1-

5110

71 FOOT CONTROLSignifies a foot controldevice; function,connection or control

IEC 60974-1-38



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a

72 MANUAL CONTROL

Signifies the switchposition for manual

control as opposed toautomatic control

ISO 7000-0096

IEC 60974-1-11

73a CAUTION

Signifies that theoperator should beaware of a generalhazard

ISO 7000-0434A

IEC 60974-1-89

73b CAUTION

Signifies that theoperator should beaware of a generalhazard

ISO 3864-2

ISO 17846-1

74a READ OPERATOR'S MANUALSignifies that theoperator's manualshould be read

ISO 7000-0790

IEC 60974-1-

90

74b READ OPERATOR'S MANUALSignifies that theoperator's manualshould be read

ISO 17846, A.3-1

ANSI/NEMA

75 WELDING (GENERAL) Signifies weldingISO 7000-

0459

76SHIELDED METAL ARCWELDING (SMAW)

Signifies the SMAWprocess, function, or control

ISO 7000-0460



EW 4-2009 – 23 – © 2009, NEMA



a

77 MMA WELDING Identifies MMA weldingIEC 60974-1-

58

78aGAS METAL ARC WELDING(GMAW)

Signifies the GMAWprocess, function, or control

ISO 7000-0461

symbol in IEC60974-1, L.4

is similar

78bGAS METAL ARC WELDING(GMAW)

Signifies the GMAWprocess, function, or control

IEC 60974-1-60

79aFLUX CORED ARC WELDING(FCAW)

Signifies the FCAW(without gas shielding)process, function, or

control

derived fromISO 7000-

0459 and IEC

60974-1-61

79bFLUX CORED ARC WELDING(FCAW)

Signifies the FCAW(without gas shielding)process, function, or control

IEC 60974-1-61

80aSUBMERGED ARC WELDING(SAW)

Signifies the SAWprocess, function, or control

ISO 7000-0467



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a

80bSUBMERGED ARC WELDING(SAW)

Signifies the SAWprocess, function, or control

IEC 60974-1-66

81a

GAS TUNGSTEN ARCWELDING (GTAW) /TUNGSTEN INERT GAS (TIG)WELDING

Signifies the GTAW/TIGprocess, function, or control

ISO 7000-0462

81bGAS TUNGSTEN ARCWELDING (GTAW) /TUNGSTEN INERT GAS (TIG)

Signifies the GTAW/TIGprocess, function, or control

IEC 60974-1-62

82 AIR CARBON ARC GOUGINGSignifies air carbon arcgouging

IEC 60974-1-59

83PLASMA ARC CUTTING(PAC)

Signifies the PACprocess, function, or control

ISO 7000-0479

84PLASMA ARC WELDING(PAW)

Signifies the PAWprocess, function, or control

ISO 7000-0478

85PLASMA ARC GOUGING(PAG)

Signifies the PAGprocess, function, or control

IEC 60974-1-65



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a

86 SPRAY TRANSFER Signifies spray transfer ISO 7000-

0472

87SHORT CIRCUITINGTRANSFER

Signifies shortcircuiting transfer

ISO 7000-0471

88 PULSE TRANSFER Signifies pulse transfer ISO 7000-

0473

89 ARC SPOT WELDINGSignifies arc spotwelding

ISO 7000-0468

90a CONTINUOUS WELDINGSignifies a continuouswelding process,function, or control

ISO 7000-

0831

90b CONTINUOUS WELDINGSignifies a continuouswelding process,function, or control

IEC 60974-1-8

91a

INTERMITTENT (STITCH)

WELDING

Signifies an intermittent(stitch) welding

process, function, or control

ISO 7000-

0832

91bINTERMITTENT (STITCH)WELDING

Signifies an intermittent(stitch) weldingprocess, function, or control

IEC 60974-1-9



EW 4-2009 – 26 – © 2009, NEMA



a

92a GTAW SPOT WELDINGSignifies GTAW spot

welding

ISO 7000-

0470

92b GTAW SPOT WELDINGSignifies GTAW spotwelding

derived fromISO 7000 andIEC 60974-1

93 GMAW SPOT WELDINGSignifies GMAW spot

welding

ISO 7000-

0469

94 CONSTANT CURRENTSignifies a constantcurrent (drooping)characteristic

ISO 7000-0454

IEC 60974-1-68

95

CONSTANT VOLTAGE OR

CONSTANT POTENTIAL

Signifies a constantvoltage characteristic

(substantially level loadvoltage characteristic)

ISO 7000-0455

IEC 60974-1-67

96 ELECTRODE CONNECTIONSignifies an electrodeconnection

ANSI/NEMA

97 WORK CONNECTION

Signifies workpiece

connection

ISO 7000-

0453

98PLASMA TORCHCONNECTION AND NOZZLE(POSITIVE SUPPLY)

Signifies a plasmatorch connection andnozzle (positive supply)

ISO 7000-0483

IEC 60974-1-27



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a

99PLASMA TORCHCONNECTION TO NEGATIVE

ELECTRODE

Signifies a plasmatorch connection to

negative electrode(negative supply)

ISO 7000-0482

IEC 60974-1-28

100 ELECTRODE POSITIVESignifies electrodepositive connection or switch position


0459

101 ELECTRODE NEGATIVESignifies electrodenegative connection or switch position

derived from

ISO 7000-0459

102SHIELDED METAL ARC(SMAW) ELECTRODEHOLDER

Signifies a SMAWelectrode holder

ISO 7000-0463

IEC 60974-1-49

103aGAS METAL ARC WELDING

(GMAW) GUN

Signifies a GMAW gun(torch) with or withoutgas shielding

ISO 7000-

0464

103bGAS METAL ARC WELDING(GMAW) GUN

Signifies a GMAW gun(torch) with or withoutgas shielding

IEC 60974-1-51

104

SELF-SHIELDED FLUX

CORED ARC WELDINGTORCH

Identifies a self shielded flux cored arc

welding torch withoutgas shielding

IEC 60974-1-

52

105FLUX CORED ARC WELDING(FCAW) GUN

Signifies a FCAW gun(torch) with or withoutgas shielding

derived fromIEC 60974-1-

52



EW 4-2009 – 28 – © 2009, NEMA



a

106 WIRE FEED SPOOL GUN

Signifies a spool gun,which consists of a

welding gun and smallspool of electrode

IEC 60974-1-

56

107aGAS TUNGSTEN ARCWELDING (GTAW) TORCH

Signifies a GTAW torchISO 7000-

0465

107bGAS TUNGSTEN ARC

WELDING (GTAW) TORCHSignifies a GTAW torch

IEC 60974-1-

53

108 AIR CARBON ARC GOUGINGELECTRODE HOLDER

Signifies an air carbonarc gouging electrodeholder

IEC 60974-1-50

109 PLASMA TORCHSignifies a plasma

torch

ISO 7000-0477

IEC 60974-1-54

110 MOTORIZED GUNIdentifies a gunincorporating a wiredrive system

IEC 60974-1-55

111

MOTORIZED GUN WITH

FILLER WIRE SUPPLY

Identifies a gunincorporating a wire

drive system andincluding a filler wiresupply

IEC 60974-1-

56

112 SUBMERGED ARC TORCHIdentifies a torch for submerged arc welding

IEC 60974-1-57



EW 4-2009 – 29 – © 2009, NEMA



a

113GMAW GUN SWITCH/

CONTROL

Signifies a GMAW gunswitch/control used to

change weldingparameters

ANSI/NEMA

114GTAW TORCH SWITCH/CONTROL

Signifies a GTAW torchswitch/control used tochange weldingparameters

ANSI/NEMA

115 FCAW GUN WITH SWITCHSignifies a FCAW gun

with switch ANSI/NEMA

116 GMAW GUN WITH SWITCHSignifies a GMAW gunwith switch

ANSI/NEMA

117 GTAW TORCH WITH SWITCHSignifies a GTAW torch

with switch ANSI/NEMA

118VENTILATING AND AIRCIRCULATING FAN

Signifies a ventilatingfan or air circulating fan

ISO 7000-0089

IEC 60974-1-42

119 LIQUID

Signifies a liquid, e.g.,

coolant

IEC 60974-1-

30

120 COOLINGSignifies cooling of components or system

ISO 7000-0027

IEC 60974-1-41



EW 4-2009 – 30 – © 2009, NEMA



a

121 COOLING WITH LIQUIDSignifies cooling with

liquid

ISO 7000-

0544

122 COOLING PUMPSignifies a coolingpump

ISO 7000-0355

123 TEMPERATURE INDICATION

Identifies thetemperature indication;for example, an excesstemperature warninglight

IEC 60974-1-

91

124 DISTURBANCE

Signifies a disturbancein the proper run of aprocedure; for example,a light indication of acircuit overload

ISO 7000-0228

125 AUTOMATIC CYCLE

Signifies an automaticsequence of machinefunctions repeatedcontinuously withoutmanual intervention

ISO 7000-

0026

126 ONE CYCLESignifies one cycle; for example, on a controlof a machine tool

ISO 7000-0426

127 PROGRAM

Signifies a programfunction or control,

such a found on amicroprocessor controlcircuit

ISO 7000-

0982

128 SAVE TO MEMORYSignifies a saving tomemory function or control

ANSI/NEMA



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a

129 RECALL FROM MEMORYSignifies a recall frommemory function or

control

ANSI/NEMA

130 DIGITAL DISPLAYSignifies a digitaldisplay function or control


2168

symbol shownin IEC 60974-

1, L.5 issimilar

131 CLOCK, TIME SWITCHSignifies a clock, timeswitch or time

IEC 60417-1-5184

132 PERCENT Signifies percent ANSI/NEMA

133 PROCESS CYCLESignifies one completeprocess cycle

ANSI/NEMA

134 PERCENT ON TIMESignifies percent ontime (duty cycle)function or control

ANSI/NEMA

135 PULSESignifies a pulsefunction or control

IEC 60974-1-70



EW 4-2009 – 32 – © 2009, NEMA



a

136 PULSE BACKGROUNDIndicates a control of

pulse background

IEC 60974-1-

44

137 PULSE PEAKIndicates a control of pulse peak

IEC 60974-1-45

138 SOFT STARTSignifies a soft start of

welding current ANSI/NEMA

139a HOT STARTSignifies a hot start of welding voltage

IEC 60974-1-46

139b HOT STARTSignifies a hot start of

welding voltage ANSI/NEMA

140 SLOPE (INCREASING)Indicates a control or function regulating theincrease of a value

IEC 60974-1-47

141 SLOPE (DECREASING)

Indicates a control or

function regulating theincrease of a value

IEC 60974-1-

48

142 ARC FORCESignifies the arc forcefunction or control

IEC 60974-1-69



EW 4-2009 – 33 – © 2009, NEMA



a

143HIGH FREQUENCY

(GENERAL)

Signifies a highfrequency connection

or function

ANSI/NEMA

144HIGH FREQUENCY ON – CONTINUOUS

Signifies the highfrequency is oncontinuously during theweld cycle

ANSI/NEMA

145aHIGH FREQUENCY ON –

START ONLY

Signifies the highfrequency is on at startonly

ISO 7000-

0476

145bHIGH FREQUENCY ON -START ONLY

Signifies the highfrequency is on at startonly

ANSI/NEMA

146TWO-STEP TRIGGER

OPERATION (GTAW)

Signifies a two-steptrigger operation of aGTAW torch; press tostart, release to go intocrater fill and stop

ANSI/NEMA

147FOUR-STEP TRIGGEROPERATION (GTAW)

Signifies a four-steptrigger operation of aGTAW torch; press tostart, release after arcignition, weld, press togo into crater fill,release to stop

ANSI/NEMA

148 TWO-STEP TRIGGEROPERATION (GMAW)

Signifies a two-steptrigger operation of a

semi-automatic gun;press to initiate wirefeed and welding,release to stop

ANSI/NEMA



EW 4-2009 – 34 – © 2009, NEMA



a

149

FOUR-STEP TRIGGER

OPERATION (GMAW)

Signifies a four-steptrigger operation of asemi-automatic gun;

press to start, releaseafter arc ignition, weld,then press and releaseto stop

ANSI/NEMA

150a IMPULSE START (GTAW)Signifies ignition of GTAW by an impulseother than HF

ANSI/NEMA

150b IMPULSE START (GTAW)Signifies ignition of GTAW by an impulseother than HF

IEC 60974-1-

12

151a TOUCH START (GTAW)Signifies ignition of GTAW by touching theworkpiece and lifting

ANSI/NEMA

151b TOUCH START (GTAW)

Signifies ignition of

GTAW by touching theworkpiece and lifting

IEC 60974-1-

13

152 WAVE BALANCESignifies an AC wavebalance function or control

ANSI/NEMA

153 MAXIMUM CLEANING

Signifies the maximumcleaning (minimum

penetration) of a GTAWprocess, function, or control

ANSI/NEMA

154 MAXIMUM PENETRATION

Signifies the maximumpenetration (minimumcleaning) of a GTAWprocess, function, or control

ANSI/NEMA



EW 4-2009 – 35 – © 2009, NEMA



a

155 PURGE BY GASSignifies purging of air

(by gas)

ISO 7000-

0474

156 GAS POSTFLOWSignifies gas postflowtime

ANSI/NEMA,derived fromISO 7000-

0474

157 GAS PREFLOWSignifies gas preflow

time

ANSI/NEMA,derived from

ISO 7000-0474

158 LOW INDUCTANCESignifies lowinductance: connection,function or control

IEC 60974-1-74

159 MEDIUM INDUCTANCESignifies mediuminductance: connection,function or control

IEC 60974-1-

73

160HIGH INDUCTANCE ORINDUCTANCE

Signifies inductance, or when used with other inductance symbols,high inductance

IEC 60974-1-72

161 VARIABLE INDUCTANCE

Signifies a variable

inductance function or control

IEC 60974-1-

71

162 PLASMA GAS Signifies plasma gasISO 7000-

0480



EW 4-2009 – 36 – © 2009, NEMA



a

163 PLASMA SHIELDING GASSignifies plasma

shielding gas

ISO 7000-

0481

164 PILOT/PULSE STARTINGSignifies pilot or pulsestarting of a plasmatorch

ANSI/NEMA

165 PILOT ARC STARTING

Identifies a TIG arcstriking function which

initiates an arc withcontact

IEC 60974-1-

14

166 WIRE FEEDSignifies a wire feedunit or wire feedfunction


0823 and IEC60974-1-16

167 WIRE FEED FORWARDSignifies the feeding of wire forward towardsthe workpiece

ANSI/NEMA

168 WIRE FEED REVERSESignifies the feeding of wire away from theworkpiece

ANSI/NEMA

169

WIRE FEED INTERMITTENT

(STITCH)/INTERRUPTED

Signifiesintermittent/interrupted

wire feed, such asstitching

ISO 7000-

0825

170COLD JOG (INCH) TOWARDWORKPIECE

Signifies the feeding of wire toward theworkpiece with outputvoltage off

ANSI/NEMA



EW 4-2009 – 37 – © 2009, NEMA



a

171COLD JOG (INCH) AWAY

FROM WORKPIECE

Signifies the feeding of wire away from the

workpiece with outputvoltage off

ANSI/NEMA

172 WIRE FEED SLOW RUN-IN

Signifies the slow runor feed of wire towardthe workpiece beforewelding

ANSI/NEMA

173 WIRE DIAMETER

Signifies the wirediameter of welding

electrode: function or control

ANSI/NEMA

174 WIRE TYPESignifies the type of welding electrode, suchas steel or aluminum

ANSI/NEMA

175 MELTBACK (BURNBACK)Signifies meltback(burnback) time at theend of a weld

ANSI/NEMA

176 WIRE BURNBACK CONTROLIdentifies burnbackcontrol at the end of theweld

IEC 60974-1-17

177 ARC IGNITION BY CONTACT

Signifies arc ignition by

contact

ISO 7000-

0475

178 AIR FLOW Identifies air flowIEC 60974-1-

29

Ø MM (IN)



EW 4-2009 – 38 – © 2009, NEMA



a

179a AIR PRESSURESignifies air pressure

function or control

ANSI/NEMA

179b AIR PRESSURESignifies air pressurefunction or control

IEC 60974-1-34

180a HOPPERSignifies a flux

(powder) hopper

ISO 7000-

0466

180b HOPPERSignifies a flux(powder) hopper

IEC 60974-1-40

181 ARC WELDING EQUIPMENT

CARRIAGE

Signifies a welding

carriage

ISO 7000-

0451

182 TIGHTEN OR CLAMP

Signifies the function of tightening or clampingtwo machine elementstogether

ISO 7000-0018

183 UNTIGHTEN OR UNCLAMP

Signifies the function of releasing two machine

elements tightened or clamped together

ISO 7000-

0019

184 BLOWINGSignifies the productionof a current of air flowdirected at an object

ISO 7000-0032



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a

185 SUCTIONSignifies the generationof air flow by use of

suction

ISO 7000-

0033

186 TORCHSignifies a welding or cutting torch

ANSI/NEMA

187 OSCILLATIONSignifies oscillationsuch as the oscillationof a welding torch

ISO 7000-

0003

188 ENGINE OIL

Signifies the engine oilindicator on theinstrument panel or oilfilling area

ISO 7000-0248

189 PULL TO STOP ENGINESignifies the pull device

used to stop the engine ANSI/NEMA

190 ENGINE CHOKE

Signifies the operatingdevice of the choke(cold starting aid) onthe instrument panel

ISO 7000-0243

191 FUEL Signifies fuel

ISO 7000-0245

SAE-0245

192 ENGINE COOLANTSignifies the enginecoolant radiator or reservoir

ANSI/NEMA



EW 4-2009 – 40 – © 2009, NEMA



a

193ENGINE COOLANT

TEMPERATURE

Signifies the enginecoolant temperature

indicator on theinstrument panel

ISO 7000-

0246

194 BATTERY (ENGINE)Signifies the batterycharging condition onthe instrument panel

ISO 7000-0247

195a AIR FILTER Signifies an air filter ANSI/NEMA

195b AIR FILTER Signifies an air filter IEC 60974-1-

43

196a ENGINESignifies a gasoline or

diesel engine

ISO 7000-1156

SAE-1156

196b ENGINESignifies a gasoline or diesel engine

ISO 7000-0796

IEC 60974-1-80

196c ENGINE

Signifies a gasoline or

diesel engine

ISO 7000-

0640

197 ENGINE RPM Signifies engine RPM SAE-2303



EW 4-2009 – 41 – © 2009, NEMA



a

198a ENGINE STOPSignifies the stopengine function or

control

ANSI/NEMA

198b ENGINE STOPSignifies the stopengine function or control

ISO 7000-1388

199 GLOW PLUGSignifies a glow plugfunction or indicator ona diesel engine

SAE-1704

200 ENGINE STARTSignifies the startfunction or control of anengine welder

ISO 7000-1387

SAE-1387

201 ELECTRIC MOTORSignifies an electric

motor ANSI/NEMA

202 HOUR METERSignifies an hour meter function or indicator

SAE-1366

203 ELAPSED ENGINE HOURS

Signifies the elapsed

engine hours

composite of SAE-1156

and SAE-1366

204 FUEL SHUTOFFSignifies the fuelshutoff to an engine

SAE-1395



EW 4-2009 – 42 – © 2009, NEMA



a

205 SLOW Signifies slow action or operation

SAE (symbolis published

in ISO 3767-1without aregistration

number)

206 FASTSignifies fast action or operation

SAE (symbolis published

in ISO 3767-1without a

registrationnumber)

207 UNLOCKEDSignifies an unlockedfunction or control

IEC 60417-1-5570

SAE

208 LOCKEDSignifies a lockedfunction or control

IEC 60417-1-5569

SAE

aExplanation of source acronyms:

ANSI American National Standards Inst ituteIEC International Electrotechnical CommissionISO International Organization for StandardizationNEMA National Electrical Manufacturers AssociationSAE Society of Automotive Engineers

There can be up to three numbers following the acronym of a source, e.g., IEC 60417-1-5110. The first number represents the number of the standard, the second number represents the part of the standard, and the third number represents the symbol number listed in a table of symbols or the clause/annex of the standard in which the symbolappears. If a standard does not have more than one part, e.g., ISO 7000, there will be no second number. Similarly, if a source has no numerical designation, e.g., SAE Handbook, there will be no first number ― and, for that matter, nosecond number as well.



EW 4-2009 – 43 – © 2009, NEMA

Table 2 ― Alphabetical list of function, keyword, or phrase

Table 1Symbol No.

AIR CARBON ARC GOUGING ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 82

AIR CARBON ARC GOUGING ELECTRODE HOLDER ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 108

AIR FILTER ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 195a,b

AIR FLOW ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 178

AIR PRESSURE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 179a,b

ALTERNATING CURRENT (AC) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 10

ALTERNATING CURRENT (AC) AND DIRECT CURRENT (DC)... ... ... ... ... ... ... ... ... ... ... 11

AMPERAGE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 1

ARC FORCE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 142

ARC IGNITION BY CONTACT.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 177

ARC SPOT WELDING ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 89

ARC WELDING EQUIPMENT CARRIAGE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 181

AUTOMATIC CYCLE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 125 AUXILIARY POWER ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 18

BATTERY (ENGINE)................................................................................................. 194

BLOWING ................................................................................................................ 184

CAUTION................................................................................................................. 73a,b

CIRCUIT BREAKER.................................................................................................. 19

CLASS II EQUIPMENT ............................................................................................. 41

CLOCK, TIME SWITCH ............................................................................................ 131

COLD JOG (INCH) AWAY FROM WORKPIECE......................................................... 171

COLD JOG (INCH) TOWARD WORKPIECE .............................................................. 170

CONSTANT CURRENT ............................................................................................ 94

CONSTANT VOLTAGE OR CONSTANT POTENTIAL ................................................ 95CONTINUOUS WELDING ......................................................................................... 90a,b

COOLING................................................................................................................. 120

COOLING PUMP ...................................................................................................... 122

COOLING WITH L\QUID........................................................................................... 121

DANGEROUS VOLTAGE.......................................................................................... 39

DC/AC CONVERTER................................................................................................ 38

DIAMETER mm (in) .................................................................................................. 46

DIGITAL DISPLAY.................................................................................................... 130

DIRECT CURRENT (DC) .......................................................................................... 9

DIRECT CURRENT GENERATOR WITH COMMUTATOR.......................................... 28

DIRECTION OF CONTINUOUS ROTATION (CLOCKWISE) ....................................... 61

DIRECTION OF CONTINUOUS ROTATION (COUNTER-CLOCKWISE) ..................... 62

DIRECTIONAL ARROW............................................................................................ 65

DISTURBANCE ........................................................................................................ 124

DO NOT SWITCH WHILE WELDING......................................................................... 63

EARTH (GROUND)................................................................................................... 12

ELAPSED ENGINE HOURS...................................................................................... 203

ELECTRIC MOTOR .................................................................................................. 201

ELECTRODE CONNECTION .................................................................................... 96



EW 4-2009 – 44 – © 2009, NEMA

Table 1Symbol No.

ELECTRODE NEGATIVE.......................................................................................... 101

ELECTRODE POSITIVE ........................................................................................... 100

ENGINE ................................................................................................................... 196a,b,cENGINE CHOKE ...................................................................................................... 190

ENGINE COOLANT .................................................................................................. 192

ENGINE COOLANT TEMPERATURE ........................................................................ 193

ENGINE OIL............................................................................................................. 188

ENGINE RPM........................................................................................................... 197

ENGINE START ....................................................................................................... 200

ENGINE STOP ......................................................................................................... 198a,b

FAST ....................................................................................................................... 206

FCAW GUN WITH SWITCH ...................................................................................... 115

FLUX CORED ARC WELDING (FCAW) ..................................................................... 79a,b

FLUX CORED ARC WELDING (FCAW) GUN ............................................................ 105

FOOT CONTROL...................................................................................................... 71

FOUR-STEP TRIGGER OPERATION (GTAW)........................................................... 147

FRAME OR CHASSIS............................................................................................... 14

FREQUENCY ........................................................................................................... 4

FUEL ....................................................................................................................... 191

FUEL SHUTOFF....................................................................................................... 204

FUSE ....................................................................................................................... 15

GAS INPUT.............................................................................................................. 52

GAS METAL ARC WELDING (GMAW) ...................................................................... 78a,b

GAS METAL ARC WELDING (GMAW) GUN .............................................................. 103a,b

GAS OUTPUT .......................................................................................................... 53

GAS POSTFLOW ..................................................................................................... 156GAS POSTFLOW ..................................................................................................... 157

GAS SUPPLY........................................................................................................... 42

GAS TUNGSTEN ARC WELDING (GTAW) TORCH ................................................... 107a,b

GAS TUNGSTEN ARC WELDING (GTAW)/TUNGSTEN INERT GAS (TIG)WELDING ................................................................................................................

81a,b

GAS TYPE ............................................................................................................... 43

GENERATOR ........................................................................................................... 27

GLOW PLUG............................................................................................................ 199

GMAW GUN SWITCH/CONTROL.............................................................................. 113

GMAW GUN WITH SWITCH ..................................................................................... 116

GMAW SPOT WELDING........................................................................................... 93GTAW SPOT WELDING ........................................................................................... 92a,b

GTAW TORCH SWITCH/CONTROL.......................................................................... 114

GTAW TORCH WITH SWITCH.................................................................................. 117

HERTZ..................................................................................................................... 3

HIGH FREQUENCY (GENERAL)............................................................................... 143

HIGH FREQUENCY ON – CONTINUOUS.................................................................. 144

HIGH FREQUENCY ON – START ONLY ................................................................... 145a,b

HIGH INDUCTANCE OR INDUCTANCE .................................................................... 160



EW 4-2009 – 45 – © 2009, NEMA

Table 1Symbol No.

HOPPER.................................................................................................................. 180a,b

HOT START ............................................................................................................. 139a,b

HOUR METER.......................................................................................................... 202IMPULSE START (GTAW) ........................................................................................ 150a,b

INCREASE/DECREASE OF QUANTITY (LINEAR)..................................................... 60

INCREASE/DECREASE OF QUANTITY (LINEAR; NUMBER OF POSITIONS) ........... 59

INCREASE/DECREASE OF QUANTITY (ROTATING)................................................ 58

INCREASE/DECREASE OF QUANTITY (ROTATING; NUMBER OF POSITIONS) ...... 56

INCREASE/DECREASE OF QUANTITY (ROTATING; WITH OFF POSITION) ............ 57

INPUT ...................................................................................................................... 47

INPUT PLUG AND CORD ......................................................................................... 16

INTERMITTENT (STITCH) WELDING ....................................................................... 91a,b

INVERTER ............................................................................................................... 35

LINE CONNECTION ................................................................................................. 17

LIQUID..................................................................................................................... 119

LOCKED .................................................................................................................. 208

LOW INDUCTANCE.................................................................................................. 158

MANUAL CONTROL................................................................................................. 72

MATERIAL THICKNESS ........................................................................................... 45

MATERIAL TYPE...................................................................................................... 44

MAXIMUM CLEANING .............................................................................................. 153

MAXIMUM PENETRATION ....................................................................................... 154

MEDIUM INDUCTANCE............................................................................................ 159

MELTBACK (BURNBACK) ........................................................................................ 175

MMA WELDING........................................................................................................ 77

MOTOR.................................................................................................................... 32MOTOR GENERATOR.............................................................................................. 33

MOTORIZED GUN.................................................................................................... 110

MOTORIZED GUN WITH FILLER WIRE SUPPLY ...................................................... 111

NEGATIVE ............................................................................................................... 7

OFF ......................................................................................................................... 54

ON ........................................................................................................................... 55

ONE CYCLE............................................................................................................. 126

OSCILLATION.......................................................................................................... 187

OUTPUT .................................................................................................................. 48

PANEL/LOCAL ......................................................................................................... 64

PERCENT ................................................................................................................ 132PERCENT ON TIME ................................................................................................. 134

PILOT ARC STARTING ............................................................................................ 165

PILOT/PULSE STARTING ........................................................................................ 164

PLASMA ARC CUTTING (PAC) ................................................................................ 83

PLASMA ARC GOUGING (PAG) ............................................................................... 85

PLASMA ARC WELDING (PAW) ............................................................................... 84

PLASMA GAS........................................................................................................... 162

PLASMA SHIELDING GAS ....................................................................................... 163



EW 4-2009 – 46 – © 2009, NEMA

Table 1Symbol No.

PLASMA TORCH...................................................................................................... 109

PLASMA TORCH CONNECTION AND NOZZLE (POSITIVE SUPPLY) ....................... 98

PLASMA TORCH CONNECTION TO NEGATIVE ELECTRODE ................................. 99POSITIVE................................................................................................................. 8

PROCESS CYCLE.................................................................................................... 133

PROGRAM............................................................................................................... 127

PROTECTIVE EARTH (GROUND) ............................................................................ 13

PULL TO STOP ENGINE .......................................................................................... 189

PULSE ..................................................................................................................... 135

PULSE BACKGROUND ............................................................................................ 136

PULSE PEAK ........................................................................................................... 137

PULSE TRANSFER .................................................................................................. 88

PURGE BY GAS....................................................................................................... 155

PUSHBUTTON SWITCH (IN) .................................................................................... 67

PUSHBUTTON SWITCH (OUT)................................................................................. 68

READ OPERATOR'S MANUAL ................................................................................. 74a,b

RECALL FROM MEMORY ........................................................................................ 129

RECEPTACLE RATING – AUXILIARY POWER ......................................................... 20

REMOTE.................................................................................................................. 66

SAVE TO MEMORY.................................................................................................. 128

SECONDS................................................................................................................ 5

SELF SHIELDED FLUX CORED ARC WELDING TORCH .......................................... 104

SHIELDED METAL ARC (SMAW) ELECTRODE HOLDER ......................................... 102

SHIELDED METAL ARC WELDING (SMAW) ............................................................. 76

SHORT CIRCUITING TRANSFER............................................................................. 87

SINGLE PHASE ....................................................................................................... 21SINGLE PHASE ALTERNATOR ................................................................................ 29

SINGLE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER

RECTIFIER ..............................................................................................................

36

SINGLE PHASE TRANSFORMER............................................................................. 24

SINGLE PHASE TRANSFORMER AC AND RECTIFIED DC POWER SOURCE.......... 34

SINGLE PHASE TRANSFORMER RECTIFIER .......................................................... 25

SLOPE (DECREASING)............................................................................................ 141

SLOPE (INCREASING)............................................................................................. 140

SLOW ...................................................................................................................... 205

SOFT START ........................................................................................................... 138

SPRAY TRANSFER.................................................................................................. 86START OF ACTION.................................................................................................. 69

STOP OF ACTION.................................................................................................... 70

SUBMERGED ARC TORCH...................................................................................... 112

SUBMERGED ARC WELDING (SAW) ....................................................................... 80a,b

SUCTION................................................................................................................. 185

SUITABLE FOR WELDING IN AN ENVIRONMENT WITH INCREASED RISK OFELECTRIC SHOCK...................................................................................................

40

TEMPERATURE INDICATION .................................................................................. 123



EW 4-2009 – 47 – © 2009, NEMA

Table 1Symbol No.

THREE PHASE ........................................................................................................ 22

THREE PHASE ALTERNATOR WITH RECTIFIER..................................................... 30

THREE PHASE MOTOR THREE PHASE ALTERNATOR RECTIFIER ........................ 31THREE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER

RECTIFIER .............................................................................................................

37

THREE PHASE TRANSFORMER RECTIFIER ........................................................... 26

TIGHTEN OR CLAMP............................................................................................... 182

TIME ........................................................................................................................ 6

TORCH .................................................................................................................... 186

TOUCH START (GTAW) ........................................................................................... 151a,b

TRANSFORMER ...................................................................................................... 23

TWO-STEP TRIGGER OPERATION (GMAW)............................................................ 148

TWO-STEP TRIGGER OPERATION (GTAW) ............................................................ 146

UNLOCKED.............................................................................................................. 207

UNTIGHTEN OR UNCLAMP ..................................................................................... 183

VARIABLE INDUCTANCE......................................................................................... 161

VENTILATION AND AIR CIRCULATING FAN ............................................................ 118

VOLTAGE ................................................................................................................ 2

VOLTAGE INPUT ..................................................................................................... 49

WATER (COOLANT) INPUT...................................................................................... 50

WATER (COOLANT) OUTPUT.................................................................................. 51

WAVE BALANCE...................................................................................................... 152

WELDING (GENERAL) ............................................................................................. 75

WIRE BURNBACK CONTROL................................................................................... 176

WIRE DIAMETER ..................................................................................................... 173

WIRE FEED ............................................................................................................. 166WIRE FEED FORWARD ........................................................................................... 167

WIRE FEED INTERMITTENT (STITCH)/INTERRUPTED............................................ 169

WIRE FEED REVERSE............................................................................................. 168

WIRE FEED SLOW RUN-IN...................................................................................... 172

WIRE FEED SPOOL GUN......................................................................................... 106

WIRE TYPE.............................................................................................................. 174

WORK CONNECTION .............................................................................................. 97



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Table 3 ― Numerical list of function, keyword, or phrase

Table 1Symbol No.

1 .................. AMPERAGE2 .................. VOLTAGE

3 .................. HERTZ

4 .................. FREQUENCY

5 .................. SECONDS

6 .................. TIME

7 .................. NEGATIVE

8 .................. POSITIVE

9 ..................DIRECT CURRENT (DC)

10................. ALTERNATING CURRENT (AC)

11................. ALTERNATING CURRENT (AC) AND DIRECT CURRENT (DC)

12................. EARTH (GROUND)

13................. PROTECTIVE EARTH (GROUND)

14................. FRAME OR CHASSIS

15................. FUSE

16................. INPUT PLUG AND CORD

17................. LINE CONNECTION

18................. AUXILIARY POWER

19................. CIRCUIT BREAKER

20................. RECEPTACLE RATING – AUXILIARY POWER

21................. SINGLE PHASE

22................. THREE PHASE

23................. TRANSFORMER

24................. SINGLE PHASE TRANSFORMER25................. SINGLE PHASE TRANSFORMER RECTIFIER

26................. THREE PHASE TRANSFORMER RECTIFIER

27................. GENERATOR

28................. DIRECT CURRENT GENERATOR WITH COMMUTATOR

29................. SINGLE PHASE ALTERNATOR

30................. THREE PHASE ALTERNATOR WITH RECTIFIER

31.... ............. THREE PHASE MOTOR THREE PHASE ALTERNATOR RECTIFIER

32................. MOTOR

33................. MOTOR GENERATOR

34.... ............ . SINGLE PHASE TRANSFORMER AC AND RECTIFIED DC POWER SOURCE

35................. INVERTER36.... ............. SINGLE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER RECTIFIER

37.... ............ . THREE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER RECTIFIER

38................. DC/AC CONVERTER

39................. DANGEROUS VOLTAGE

40.................SUITABLE FOR WELDING IN AN ENVIRONMENT WITH INCREASED RISK OFELECTRIC SHOCK

41................. CLASS II EQUIPMENT

42................. GAS SUPPLY



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Table 1Symbol No.

43................. GAS TYPE

44................. MATERIAL TYPE

45................. MATERIAL THICKNESS46................. DIAMETER mm (in)

47................. INPUT

48................. OUTPUT

49................. VOLTAGE INPUT

50................. WATER (COOLANT) INPUT

51................. WATER (COOLANT) OUTPUT

52................. GAS INPUT

53................. GAS OUTPUT

54................. OFF

55................. ON

56.... ............ . INCREASE/DECREASE OF QUANTITY (ROTATING; NUMBER OF POSITIONS)

57.... ............ . INCREASE/DECREASE OF QUANTITY (ROTATING; WITH OFF POSITION)

58................. INCREASE/DECREASE OF QUANTITY (ROTATING)

59.... ............ . INCREASE/DECREASE OF QUANTITY (LINEAR; NUMBER OF POSITIONS)

60................. INCREASE/DECREASE OF QUANTITY (LINEAR)

61................. DIRECTION OF CONTINUOUS ROTATION (CLOCKWISE)

62..... ............ DIRECTION OF CONTINUOUS ROTATION (COUNTER-CLOCKWISE)

63................. DO NOT SWITCH WHILE WELDING

64................. PANEL/LOCAL

65................. DIRECTIONAL ARROW

66................. REMOTE

67................. PUSHBUTTON SWITCH (IN)

68................. PUSHBUTTON SWITCH (OUT)69................. START OF ACTION

70................. STOP OF ACTION

71................. FOOT CONTROL

72................. MANUAL CONTROL

73a,b ............CAUTION

74a,b ............ READ OPERATOR'S MANUAL

75................. WELDING (GENERAL)

76................. SHIELDED METAL ARC WELDING (SMAW)

77................. MMA WELDING

78a,b ............ GAS METAL ARC WELDING (GMAW)

79a,b ............FLUX CORED ARC WELDING (FCAW)80a,b ............SUBMERGED ARC WELDING (SAW)

81a,b............ GAS TUNGSTEN ARC WELDING (GTAW)/TUNGSTEN INERT GAS (TIG)WELDING

82................. AIR CARBON ARC GOUGING

83................. PLASMA ARC CUTTING (PAC)

84................. PLASMA ARC WELDING (PAW)

85................. PLASMA ARC GOUGING (PAG)

86................. SPRAY TRANSFER



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Table 1Symbol No.

87................. SHORT CIRCUITING TRANSFER

88................. PULSE TRANSFER

89................. ARC SPOT WELDING90a,b ............ CONTINUOUS WELDING

91a,b ............INTERMITTENT (STITCH) WELDING

92a,b ............ GTAW SPOT WELDING

93................. GMAW SPOT WELDING

94................. CONSTANT CURRENT

95................. CONSTANT VOLTAGE OR CONSTANT POTENTIAL

96................. ELECTRODE CONNECTION

97................. WORK CONNECTION

98................. PLASMA TORCH CONNECTION AND NOZZLE (POSITIVE SUPPLY)

99................. PLASMA TORCH CONNECTION TO NEGATIVE ELECTRODE

100...............ELECTRODE POSITIVE

101............... ELECTRODE NEGATIVE

102............... SHIELDED METAL ARC (SMAW) ELECTRODE HOLDER

103a,b ..........GAS METAL ARC WELDING (GMAW) GUN

104............... SELF SHIELDED FLUX CORED ARC WELDING TORCH

105............... FLUX CORED ARC WELDING (FCAW) GUN

106............... WIRE FEED SPOOL GUN

107a,b ..........GAS TUNGSTEN ARC WELDING (GTAW) TORCH

108............... AIR CARBON ARC GOUGING ELECTRODE HOLDER

109...............PLASMA TORCH

110............... MOTORIZED GUN

111............... MOTORIZED GUN WITH FILLER WIRE SUPPLY

112............... SUBMERGED ARC TORCH113...............GMAW GUN SWITCH/CONTROL

114...............GTAW TORCH SWITCH/CONTROL

115............... FCAW GUN WITH SWITCH

116...............GMAW GUN WITH SWITCH

117............... GTAW TORCH WITH SWITCH

118............... VENTILATION AND AIR CIRCULATING FAN

119............... LIQUID

120...............COOLING

121............... COOLING WITH LIQUID

122...............COOLING PUMP

123............... TEMPERATURE INDICATION124............... DISTURBANCE

125............... AUTOMATIC CYCLE

126............... ONE CYCLE

127...............PROGRAM

128...............SAVE TO MEMORY

129...............RECALL FROM MEMORY

130............... DIGITAL DISPLAY

131...............CLOCK, TIME SWITCH



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Table 1Symbol No.

132...............PERCENT

133...............PROCESS CYCLE

134............... PERCENT ON TIME135...............PULSE

136...............PULSE BACKGROUND

137...............PULSE PEAK

138...............SOFT START

139a,b ..........HOT START

140............... SLOPE (INCREASING)

141...............SLOPE (DECREASING)

142...............ARC FORCE

143............... HIGH FREQUENCY (GENERAL)

144............... HIGH FREQUENCY ON – CONTINUOUS

145a,b ..........HIGH FREQUENCY ON – START ONLY

146............... TWO-STEP TRIGGER OPERATION (GTAW)

147............... FOUR-STEP TRIGGER OPERATION (GTAW)

148...............TWO-STEP TRIGGER OPERATION (GMAW)

150a,b ..........IMPULSE START (GTAW)

151a,b ..........TOUCH START (GTAW)

152............... WAVE BALANCE

153...............MAXIMUM CLEANING

154...............MAXIMUM PENETRATION

155...............PURGE BY GAS

156...............GAS POSTFLOW

157...............GAS POSTFLOW

158............... LOW INDUCTANCE159...............MEDIUM INDUCTANCE

160...............HIGH INDUCTANCE OR INDUCTANCE

161...............VARIABLE INDUCTANCE

162...............PLASMA GAS

163............... PLASMA SHIELDING GAS

164...............PILOT/PULSE STARTING

165............... PILOT ARC STARTING

166............... WIRE FEED

167............... WIRE FEED FORWARD

168............... WIRE FEED REVERSE

169............... WIRE FEED INTERMITTENT (STITCH)/INTERRUPTED170...............COLD JOG (INCH) TOWARD WORKPIECE

171...............COLD JOG (INCH) AWAY FROM WORKPIECE

172...............WIRE FEED SLOW RUN-IN

173............... WIRE DIAMETER

174............... WIRE TYPE

175............... MELTBACK (BURNBACK)

176...............WIRE BURNBACK CONTROL

177............... ARC IGNITION BY CONTACT



EW 4-2009 – 52 – © 2009, NEMA

Table 1Symbol No.

178............... AIR FLOW

179a,b ..........AIR PRESSURE

180a,b ..........HOPPER181............... ARC WELDING EQUIPMENT CARRIAGE

182............... TIGHTEN OR CLAMP

183...............UNTIGHTEN OR UNCLAMP

184...............BLOWING

185...............SUCTION

186...............TORCH

187............... OSCILLATION

188...............ENGINE OIL

189............... PULL TO STOP ENGINE

190...............ENGINE CHOKE

191...............FUEL

192...............ENGINE COOLANT

193...............ENGINE COOLANT TEMPERATURE

194...............BATTERY (ENGINE)

195a,b ..........AIR FILTER

196a,b,c .......ENGINE

197............... ENGINE RPM

198a,b ..........ENGINE STOP

199...............GLOW PLUG

200............... ENGINE START

201............... ELECTRIC MOTOR

202...............HOUR METER

203...............ELAPSED ENGINE HOURS204...............FUEL SHUTOFF

205...............SLOW

206...............FAST

207...............UNLOCKED

208............... LOCKED

6 How to combine graphic symbols

6.1 General

Follow the instructions in Clause 5 to determine what part is being described and how to select

an existing symbol for it if one exists. Always try to use the standard symbols in Table 1 exactlyas they are presented. If they do not satisfy the need, then develop a combination or compositesymbol using standard symbols as described in 6.2.

A combination or composite symbol is one that is made up of one or more symbols. Compositesymbols are useful when standard symbols do not provide enough information to communicatethe desired information. There are some composite symbols that are listed in Clause 5. Thesesymbols are used often and should be used in new applications whenever possible. Theexamples in 6.2 show how to develop composite symbols when a new symbol is required.



EW 4-2009 – 53 – © 2009, NEMA

6.2 Procedure to combine symbols

The procedure to combine symbols is shown by way of the example below.

EXAMPLE 1 Assume a symbol is needed to explain that a given receptacle is used for connecting a Remote Amperage Control to the power source. First , li st the connec tion to be exp lained in ful l and then break into par ts, as

follows:REMOTE AMPERAGE CONTROL

Key words: Remote, Amperage Control

Use the standard symbol for each key word from Table 1, i.e., symbols 1 and 68.

Amperage (Control ):

Remote:

Combine the standard symbols to produce the composite.

Remote Amperage Control (Connection Point or Function):

The example above shows a composite symbol being formed from two standard symbols. Thefollowing examples are of a composite symbol formed from three standard symbols.

EXAMPLE 2 Remote Amperage and Voltage Control

Key Words: Remote, Amperage Control, Voltage Control

Apply the standard symbol from Tabl e 1 for each key word, i.e., symbol s 1 , 2 and 68.

Remote:

Amperage (Control ):

Voltage (Control):

Combine the symbols to form the composite symbol.

Remote Amperage and Voltage Control (Connection Point or Function):

EXAMPLE 3 High Frequency SwitchKey Words: High Frequency, Switch (with ON and OFF positions)

High Frequency:

ON

OFF



EW 4-2009 – 54 – © 2009, NEMA

The composite symbol is then:

The examples that follow use the same basic principles as in the above examples, but usedifferent symbols for different purposes.

EXAMPLE 4 This grouping of symbols shows Initial Current and Weld Current for use with controls for separatefunctions during parts of a weld cycle. To create the symbol for Initial Current, use symbols 1 and 133 from Table 1 andproceed as follows.

Amperage (un its o f measure for current) :

Process Cycle:

The two combined symbols along with a thickened portion of the process cycle mean Initial Current, shown as follows:

The Initial Current segment of the process cycle symbol is approximately 3 to 4 times as thick as the other segments toshow clearly the portion being emphasized. The symbol for Weld Current is created in the same way as shown below.

Amperage:

Weld Process Cycle.

The two combined symbols along with a thickened portion of the Process Cycle mean Weld Current, shown as follows:

OR

This example also used symbols 1 and 133 from Table 1. The exact location of "A" in relation to the thickened portioncan be moved slightly to accommodate nameplate space as shown. The emphasized portion again is appropriatelythickened to indicate clearly the selected segment of the process cycle.

EXAMPLE 5 This grouping shows Peak (High) Pulse Time and Background (Low) Pulse Current for use withpulsing controls. Using symbols 6 and 135 from Table 1, proceed as follows to create the symbol for Peak (High) PulseTime.

Time:

Pulse (Pulsing):

AA



EW 4-2009 – 55 – © 2009, NEMA

The two combined symbols along with a thickened portion of the pulse mean Peak (High) Pulse Time, shown as follows:

The top segment of the pulse symbol is widened to approximately 3 to 4 times the thickness of the other segments to

show clearly the portion being emphasized.

EXAMPLE 6 The symbol for Background (Low) Pulse Current is created in the same way as in the example above.

Amperage:

Pulse:

The two symbols along with a thickened portion of the pulse mean Background (Low) Pulse Current, shown as follows:

This example uses symbols number 1 and 135 from Table 1. The emphasized portion again is appropriately widened toindicate clearly the selected segment of the pulse.

The example below follows the same method used in the previous examples, but for a differentpurpose.

EXAMPLE 7 This example shows Fast Pulse Frequency for use on the positions of a pulse time range switch. Tocreate the proper symbol, proceed as follows.

Pulse (Pulsing), symbol 135:

Slow Pulse:

By suitably modifying symbol 135 from Table 1, the two symbols above now represent fast and slow pulsing. Notice theconsistent line weights, heights, and total length of both symbols. Use this procedure and apply these considerationswhen creating new symbols.

The two symbols work well when used as Fast Pulse and Slow Pulse positions of a Pulse Tune Range Switch, shownas follows:

6.3 Summary

Creating composite symbols is not difficult. It requires only simple care and precision. Alwaysproceed according to the standard method shown in the example in 6.2 using the followingguidelines:

a) write down the name for the connection or control;

b) identify the keywords;

c) find the standard symbol in Table 1 for each keyword;

t

A



EW 4-2009 – 56 – © 2009, NEMA

d) combine the standard symbols according to examples in 6.2;

e) locate symbols with controls and connection points according to examples in 6.2;

f) pay attention to line weight, height, width and position of each symbol;

g) be consistent in application and always use approved symbols from Table 1 for composites

whenever possible.



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Annex A(informative)

Examples of Grouping of Symbols

NOTE The examples in this Annex show groupings of symbols with and without supplementary text.

A.1 Input voltage/power switch

Figure A.1 ― Input Voltage/Power Switch

A.2 Use of remote receptacles and selector switches

Figure A.2 ― Use of remote receptacles and selector switches

v INPUT VOLTAGE / POWER

ON

OFF

REMOTE

PANEL

REMOTECURRENTCONTROLA

PANEL

REMOTE

RECEPTACLE SWITCH SWITCH



EW 4-2009 – 58 – © 2009, NEMA

A.3 Weld start and stop push buttons

Figure A.3 ― Weld start and stop push buttons

A.4 Panel indicator lights

Figure A.4 ― Panel indicator lights

START

STOPSTOP

PUSHBUTTON

STARTPUSHBUTTON

HIGH FREQUENCY ON

OUTPUT VOLTAGE / POWER ON

DISTURBANCE (OVERLOAD, MALFUNCTION, FAULT, ETC.)

TEMPERATURE LIMIT REACHED

HF

V



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A.5 Output (contactor) switch

Figure A.5 ― Output (contactor) switch

A.6 Arc force control potentiometer

Figure A.6 ― Arc force control potentiometer

ARC FORCE

VOUTPUT

VOLTAGE

REMOTEOUTPUT VOLTAGESWITCHED REMOTELY

ONOUTPUT VOLTAGEALWAYS ON



EW 4-2009 – 60 – © 2009, NEMA

A.7 Terminals and selector switch on AC/DC welder

Figure A.7 ― Terminals and selector switch on AC/DC welder

A.8 Process switch (SMAW-GTAW-GMAW)

Figure A.8 ― Process switch (SMAW-GTAW-GMAW)

AC

ELECTRODEPOSITIVE

ELECTRODENEGATIVE

DO NOT SWITCH UNDER LOAD

ELECTRODECONNECTION

WORKCONNECTION

OUTPUTTERMINALS

GMAW

GTAW

SMAW



EW 4-2009 – 61 – © 2009, NEMA

A.9 Ignition switch on engine driven welder

Figure A.9 ― Ignition switch on engine driven welder

A.10 Idle switch

Figure A.10 ― Idle switch

OFF

ON

ENGINE



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A.11 Start/run switch

Figure A.11 ― Start/run switch

A.12 Process selection for GMAW

Figure A.12 ― Process selection for GMAW

SHORTCIRCUIT

TRANSFER

PULSETRANSFER

SPRAY TRANSFER



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A.13 Control potentiometers for GMAW

Figure A.13 ― Control potentiometers for GMAW

A.14 Switched settings for GMAW

Figure A.14 ― Switched settings for GMAW

VOLTAGE

V

VARIABLE INDUCTANCE

VOLTAGE

VINDUCTANCE

MEDIUM

LOW HIGH



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A.15 Setting pulsing parameters using digital display

Figure A.15 ― Multi-function switches with digital display

A.16 Setting pulsed GMAW parameters with digital display

Figure A.16 ― Setting pulsed GMAW parameters with digital display

AAPEAK

CURRENTBACKGROUND

CURRENT

PERCENT ON TIME

PULSEFREQUENCY

DECREASE

INCREASE

DIGITALDISPLAY

PEAKVOLTAGE

BACKGROUNDVOLTAGE

PEAK PULSE TIME

PULSEFREQUENCY

DECREASE

INCREASE

DIGITALDISPLAY

t

VV



EW 4-2009 – 65 – © 2009, NEMA

A.17 AC balance control with balanced position used for the SMAW process

Figure A.17 ― AC balance control with balanced position used for the SMAW process

+−

ACBALANCE

MAXIMUMCLEANING

MAXIMUM

PENETRATION

EW 4 2009 Watermarked

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