1910.269: Electric Power Generation, Transmission, and ... · 1910.269(i): Hand and Portable Power...
Transcript of 1910.269: Electric Power Generation, Transmission, and ... · 1910.269(i): Hand and Portable Power...
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1910.269: Electric Power
Generation, Transmission, and
Distribution
Region IV - OSHA
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Scope
� This standard covers the
operation and maintenance of
electric power generation,
control, transformation
transmission, an distribution
lines and equipment.
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Construction VS Maintenance
� Construction:
�The erection of new electric
lines and equipment.
�The alteration, conversion, and
improvement of existing lines
and equipment.
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1910.269(a)(2):
Training
� All employees:
� Safety practices of 1910.269
� Emergency procedures
� Other necessary safety
practices
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Training in Emergency Procedures
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1910.269(a)(2):
Training
� Qualified employees:
� Ability to distinguish live parts
� Ability to determine voltage
� Knowledge of minimum approach distances
� Ability to use protective equipment
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1910.269(a)(2):
Training
� Regular supervision and annual
inspection to determine compliance
� Follow-up training and retraining:
� New work procedures
� Tasks performed infrequently
� Certification
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1910.269(b)(1):
CPR & First Aid Training
� Performing work on or associated
with:
� Exposed lines, or
� Equipment energized at 50 volts
or more
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1910.269(b)(1):
CPR & First Aid Training
� Field work - crews of two or more
employees:
� Two trained persons, or
� All new hires trained within 3 months
� Fixed work locations:
� Trained person available within 4
minutes, or
� All employees are trained
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1910.269(b)(2):
First Aid Supplies
�First aid
supplies in a
weatherproof
container on a
service truck.
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1910.269(c):
Job Briefing
�Subjects:
� Hazards and personal protective
equipment
� Work procedures and special
precautions
� Energy source control
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Job Briefing
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1910.269(c):
Job Briefing
� Number of briefings:
�Before start of each day or shift
�Additional job briefings if significant changes occur
� Based on nature and complexity of work
� Job planning for one-person crews
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1910.269(d): Hazardous
Energy Control Procedures
� Deenergize and lock or tag
� Additional protective
measures for tags
� Protection equivalent to locks
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1910.269(d)(2)(ii)(B):
Use of Tagout System Only
� Demonstrate full employee
protection
� Safety equivalent to lockout
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Application of Lockout
�Tags rather than
locks are
commonly used in
electric utilities
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1910.269(d)(2)(ii)(B):
Use of Tagout System Only
� Examples of demonstration of employee protection:
� Removal of a fuse
� Removal of an isolating circuit element
� Blocking mechanism on switch
� Opening of additional switches on main circuit, on control circuit
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1910.269(e):
Enclosed Spaces
� Entered under normal operating
conditions:
�Manholes, Vaults
� Applies to routine entry in lieu of
1910.146(d) to (k)
� 1910.269(e) & (t) apply to entry only
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1910.269(e):
Enclosed Spaces
� 1910.146(c) still applies:
� Identify permit spaces
� Keep unqualified persons out
� Coordinate with contractors
� If hazardous conditions develop, use
1910.146
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1910.269(e):
Enclosed Spaces
� Enclosed Spaces (Specific)
� Training:
� Entrants, attendants
� Rescue equipment provided
� Evaluate hazards:
� Use of attendants
� Test, ventilate, monitor
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Manhole� Atmospheric Testing prior to Entry
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Manhole� Vault with Protective Barrier
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Vault Entry� Rescue training
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Vault Entry� Rescue Equipment
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Testing Equipment
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1910.269(g):
Personal Protective Equipment
� Follow Part 1910, Subpart I:
� Eye and face
� Respiratory
� Head, foot
� Electrical protective devices
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Lineman with Protective Gear
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Supplied Air Respirator
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Air-Purifying Respirator
� Negative-pressure fit check
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Air-Purifying Respirator
� Positive-pressure fit check
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1910.269(g)(2):
Fall Protection
�When required:
� Heights greater than 4 feet
� Poles, towers, and similar
structures
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Pole Climbing
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Body Belt
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Pole Climbing Strap
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Tower Climbing
Tower Climbing with proper person protective
equipment
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Tower Climbing
Tower Climbing with proper person protective
equipment
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1910.269(g)(2):
Fall Protection
� Not required by qualified employee:
� Climbing
� Changing location
� Must be free from unsafe conditions:
� Ice, high winds, contamination on structure
� Must have hands free for climbing
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1910.269(g)(2):
Fall Protection
� Does not address working on:
� Portions of buildings
� Electric equipment
(transformers, capacitors)
� Aerial lifts
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1910.269(h): Ladders, Platforms,
Step Bolts, & Manhole Steps
� Part 1910, Subpart D applies
� Special ladders and platforms:
� Exempt from pitch & footing
requirements
�Must be secured in position
�May not be overloaded
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Special Ladder� Special ladder secured in position
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1910.269(h): Ladders, Platforms,
Step Bolts, & Manhole Steps
� Special ladders and platforms
Cont’d:
�Must be designed for use
�Must have a safety factor of at
least 2.5 times the maximum
� Intended load
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1910.269(i):
Hand and Portable Power Tools
� Cord - and plug connected equipment:
� Part 1910, Subpart S applies
� Grounded, double - insulated, or connected through an isolated transformer with an ungrounded secondary
� Portable and vehicle - mounted generators
� Hydraulic and pneumatic tools
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1910.269(j):
Live - Line Tools�Design:
� 100 kv/ft for fiberglass reinforced plastic (FRP)
� 75 kv/ft for wood
�Condition of tools:
� Daily inspection before use; inspection every two years
� Tests after repair and after inspection for hollow FRP and wood tools
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Live Line Tools
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Live Line Tools
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1910.269(k):
Materials Handling and Storage
� Part 1910, Subpart N applies
� Storage in areas restricted to qualified persons:
� Materials must be outside working space
� See 1910.269(u)(1) and (v)(3)
� Storage in unrestricted areas:
� Materials must be 10 ft away
� Add 4 inches for every kv over 50 kV
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1910.269(l)(1):
Qualified employees only
� At least two persons for:
�Work with exposure at more than 600 V
�Work with equivalent hazards
� Two persons not required for:
� Live - line tool work
�Routine switching
�Emergency repairs
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1910.269(l)(2):
Minimum Approach Distances
� Minimum approach distances (Tables R-6
through R-10)
� Exceptions:
� Insulate the employee
� Insulate the live part
� Employee is insulated from other
exposed conductive object,
� As during live-line bare-hand work
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Safety Equipment Inspection
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Installation of Rubber Blankets
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1910.269(l)(6):
Apparel
� Conductive Clothing:
� Prohibited unless no increased hazard of electrical contact
� Flammable Clothing:
� Train employees in hazards
� Clothing may not increase extent of possible injury
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100% Cotton Shirt
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100% Cotton Shirt
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Synthetic Shirt
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Clothing Issue� What method are you using to protect
employees from electric arcs and
flames?
� Flame Retardant.
� Treated.
� 100% Cotton.
� Appropriate weight.
� Documentation.
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Denim Jeans
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100% Cotton Sock
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Flame Resistant Shirt
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1910.269(m): Deenergizing Lines and
Equipment for Employee Protection
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Employee Protection
� Applies to transmission and distribution
� System operator controls switching - central control
� No central control - use employee in charge
� Request clearance of system from operator
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Employee Protection
� Deenergize line:
� Open disconnecting means
� Tag disconnecting means
� Test for deenergized conditions
� Install protective grounds
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Employee Protection
� Work on line
� Release clearance:
� Notify employees
� Clear employees
� Remove protective grounds
� Report to the system operator
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Employee Protection
� Reenergize Line:
� Remove tags
� Close disconnecting
means
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1910.269(n): Grounding for
the Protection of Employees
� Ground deenergized lines, unless
�No possibility of contact with
other source hazard of induced
voltage is not present
� Equipotential zone
� Test before applying grounds
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Grounds
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Grounds
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Grounding of Lines
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Checking Ground Wire
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Ground Installation
� Proper order of connection and
removal:
� Install ground end first
� Remove line or equipment end
first
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1910.269(o):
Testing and Test Facilities
� Applies to high-power and high-voltage testing rather than routine line work
� Establish safe practices
� Guard test areas
� Grounding to be established and implemented
� Safety checks required
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1910.269(p):
Mechanical Equipment
� Mechanical considerations:
� Inspection
� Provisions for backing up
� Roll-over protective structures
� Outriggers
� Load ratings
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Bucket Truck
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Digger Derrick Truck
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Bucket Truck
� Bucket truck
with outriggers
fully extended
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1910.269(p):
Mechanical Equipment� Operations near energized lines
(equipment) Maintain minimum approach distance:
� Insulated portion of aerial lift is exempt
� Designated observer if necessary
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Warning Label on Bucket Truck
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Lineman in Bucket
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1910.269(p):
Mechanical Equipment� Additional precautions:
� Insulate the lines, or
� Insulate the mechanical equipment, or
� Protect employees from hazardous differences in potential
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Insulating Lines
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Insulating Lines
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Protecting Employee form
Differences in potential
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Protecting Employee form
Differences in potential
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1910.269(q):
Overhead Lines
� Poles, towers safe for climbing (Test
methods for poles in Appendix D)
� Installing and removing lines:
� Mechanical considerations
� Electrical considerations
� Live-line bare-hand work; training
required
� Tower and structure work
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1910.269(r): Line - Clearance
Tree Trimming Operations
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1910.269(r)(1):
Electrical� Not applicable to qualified
employees
� Always maintain minimum approach distance
� Work may not be performed in adverse weather conditions Special training required for work in the aftermath of a storm
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Tree Limb Lodged Between Two
Energized Lines
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Mechanical Equipment
Requirements for:� Brush chippers
� Sprayers
� Stump cutters
� Power saws
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1910.269(r)(8):
Fall Protection� Each employee shall be tied in with
a climbing rope and safety saddle
when the employee is working aloft
in a tree.
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1910.269(s):
Communication Facilities
� Microwave Transmission:
� See 1910.97
� Radiation protection guide
� Power Line Carrier
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1910.269(t): Underground
Electrical Installations
� Access (ladder etc.) required for depth >4 ft.
� Attendants for manholes:
� First aid and CPR training.
� Employee on the surface may enter briefly to assist; other than emergency.
� No attendant for housekeeping, taking readings, etc.
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Access ladder for Underground
Electrical Installation (Vault)
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First Aid Training Inside a Vault
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1910.269(t): Underground
Electrical Installations
� Defective cables:
� Deenergize, if possible
� Use shield to contain fault
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1910.269(u):
Substations� Access and working space:
� NESC guidelines
� Guarding of live parts:
� NESC guidelines, or
� Subpart S (NEC) requirements
� Keep draw-out-type circuit breakers in open position when removing or inserting
� Grounding of conductive fences
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Substation Overview
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Detailed View of Transformers
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Insulators & Connectors
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1910.269(v):
Power Generation� Access and working space:
� NESC guidelines
� Guarding of live parts:
� NESC guidelines, or
� Subpart S (NEC) requirements
� Changing generator brushes:
� Check for ground condition
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1910.269(v):
Power Generation� Chemical cleaning of boilers - restrict
access, post signs
� Chlorine systems
� Coal and ash handling:
� MSHA jurisdiction
� Railroad
� Conveyors
� Storage areas
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1910.269(w):
Special Conditions� Capacitors
� Illumination to enable performing safe work
� Protection against drowning (U.S. Coast Guard approved floating devices)
� Employee protection in public work areas:
� Traffic control
� Barricades
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Traffic Control
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Warning Sign
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