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17th Edition Wiring Regulations Version 1.0 Sept 2007 © NICEIC Group 2007
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C & G 2382-10 Level 3 Certificate in Requirements for Electrical Installations
BS 7671: 2008, the IEE Wiring Regulations, is the definitive standard for the electrical industry in respect of safe use and operation of electrical equipment and systems. They set the requirements and operating criteria for the UK and correspond to Harmonized standards.
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C & G 2382-10 – Level 3 Certificate in Requirements for Electrical Installations
• This qualification is primarily aimed at practising electricians with relevant experience and other allied professionals e.g. surveyors, consultants and other trades needing to update and enhance their understanding of IEE Wiring Regulations. It may also be suitable for anyone requiring an understanding of BS 7671.
• It is intended to ensure that individuals are conversant with the format, content and the application of the Requirements for Electrical Installations BS 7671: 2008 (17th edition).
• City & Guilds 2382-10 examination consists of 60 multi-choice questions covering all sections of BS 7671 (7 parts and 15 Appendices)
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Why are Regulations changed/updated?
The main use of electricity was originally for street lighting replacing gas systems. It then progressed into the home (the first homes had
their own generators)
Progressively more electrical equipment/appliances were used in the home and at work.
Technological advancements also result in regulation changes, for example:
- Rewireable fuses to circuit-breakers - Wider use of RCDs- Introduction of solar panels, wind turbines and CHP units
and then there’s HARMONIZATION!
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Background to Harmonization
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BS 7671: 2008 is a British Standard
Requirements for Electrical Installations
• also known as the IEE Wiring Regulations (17th Edition)
• UK’s National Standard for electrical installation work,
• Wiring Regulations were first published back in 1882
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Relationship with Statutory Regulations
BS 7671 is non-statutory, but it may be
used in a court of law in evidence to
claim compliance with a statutory
requirement
The relevant statutory provisions are listed in Appendix 2 of BS 7671.
(Refer to Appendix 2)
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Relationship with Statutory Regulations
It should also be noted that BS 7671 is referred to in the Electricity Safety, Quality and Continuity Regulations 2002 as being an acceptable standard which will satisfy those statutory Regulations.
Additionally, the Health and Safety Executive considers compliance with BS 7671 is likely to achieve conformity with the relevant parts of the Electricity at Work Regulations 1989.
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The structure of BS 7671: 2008
BS 7671 contains seven Parts and fifteen Appendices
Each Part, except one, contains Chapters
Each Chapter contains Sections
Each Section contains individual (or groups of) Regulations
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The 7 Parts of BS 7671: 2008
Part 1 – Scope, object and fundamental principles
Part 2 – Definitions
Part 3 – Assessment of general characteristics
Part 4 – Protection for safety
Part 5 – Selection and erection of equipment
Part 6 – Inspection and testing
Part 7 – Special installations or locations
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The (New) Numbering System
Now uses an all-new point/dot numbering system, based on the IEC numbering system
i.e. Dashes replaced, and zeros have been dropped.So …
16th Edition
Regulation522-06-06
17th Edition
Regulation522.6.6
Is now
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The (New) Numbering System explained
1st digit still signifies a Part (of BS 7671),
2nd digit is a Chapter (the second one of Part 5),
3rd digit is a Section (the fourth of Chapter 52 (five-two), &
the subsequent number(s) are the Regulation (or group of Regulation) number(s)
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Example use of Numbering System (524.1)
Selection and erectionof equipment
Selection and erection of wiring systems
Cross-sectional area of conductors of cables
Cross-sectional area of each conductor in an AC and/or DC circuit
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Exercise: Numbering System
(1) What is the Part, Chapter, Section and Regulation Group within the following Regulation number?
Regulation 521.9.3
(2) What does the Regulation relate to?
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Answer to Exercise
Regulation 521.9.3
‘A flexible cable or flexible cord shall be used for fixed wiring only where the relevant provisions of these Regulations are met.’
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Regulation numbering system in Part 7
Numbering system for Special installations or locations differs slightly …
The numbers appearing after a Section number generally refers to the corresponding Chapter, Section or Regulation within Parts 1 to 6 or another Chapter, Section or Regulation within Part 7.
The numbering system does not, therefore, always follow sequentially.
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Example use of Numbering System in Part 7
Regulation 701.415.2
Relates to Supplementary equipotential bondingin a location containing a bath or shower
How?
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Regulation numbering system
Regulation (701) indicates the Regulation is in Section 701 – Locations containing a bath or shower (which is in Part 7 Special installations or locations).
The following numbers in the Regulation (415.2) point us to Regulation 415.2, which is located in Part 4 (Additional protection: Supplementary equipotential bonding).
As a result, Regulation 701.415.2 relates to supplementary equipotential bonding within a location containing a bath or shower.
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Exercise: Numbering System in Part 7
(1) What is the Part, Chapter, Section and Regulation Group within the following Regulation number?
Regulation 701.753
(2) What does the Regulation relate to?
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Answer to Exercise
Regulation 701.753
Relates to electric floor heating systems in a location containing a bath or shower.
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Appendices
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Final Exercise: Structure of BS 7671
1. How many Parts are there in BS 7671?
2. How many Appendices are there in BS 7671?
3. What Part of BS 7671 relates to Special installations or locations?
4. What does Part 4 of BS 7671 relate to?
5. What section provides the requirements relating to construction and demolition site installations?
6. What does Appendix 5 relate to?