Electric Power Generation 269
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Transcript of Electric Power Generation 269
1910.269: Electric Power Generation, Transmission, and
Distribution
Region IV - OSHA
Scope This standard covers the
operation and maintenance of electric power generation, control, transformation transmission, an distribution lines and equipment.
Construction VS Maintenance
Construction:The erection of new electric
lines and equipment.The alteration, conversion, and
improvement of existing lines and equipment.
1910.269(a)(2):Training
All employees: Safety practices of 1910.269 Emergency procedures Other necessary safety
practices
Training in Emergency Procedures
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
1910.269(a)(2):Training
Regular supervision and annual inspection to determine compliance
Follow-up training and retraining:New work proceduresTasks performed infrequently
Certification
1910.269(b)(1):CPR & First Aid Training
Performing work on or associated with: Exposed lines, or Equipment energized at 50 volts
or more
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
1910.269(b)(2):First Aid Supplies
First aid supplies in a weatherproof container on a service truck.
1910.269(c):Job Briefing
Subjects: Hazards and personal protective
equipment Work procedures and special
precautions Energy source control
Job Briefing
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
1910.269(d): Hazardous Energy Control Procedures
Deenergize and lock or tag Additional protective
measures for tags Protection equivalent to locks
1910.269(d)(2)(ii)(B):Use of Tagout System Only
Demonstrate full employee protection
Safety equivalent to lockout
Application of Lockout
Tags rather than locks are commonly used in electric utilities
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
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
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
1910.269(e):Enclosed Spaces
Enclosed Spaces (Specific) Training: Entrants, attendants
Rescue equipment provided Evaluate hazards:
Use of attendants Test, ventilate, monitor
Manhole Atmospheric Testing prior to Entry
Manhole Vault with Protective Barrier
Vault Entry Rescue training
Vault Entry Rescue Equipment
Testing Equipment
1910.269(g):Personal Protective Equipment Follow Part 1910, Subpart I:
Eye and face Respiratory Head, foot Electrical protective devices
Lineman with Protective Gear
Supplied Air Respirator
Air-Purifying Respirator Negative-pressure fit check
Air-Purifying Respirator Positive-pressure fit check
1910.269(g)(2): Fall Protection
When required: Heights greater than 4 feet Poles, towers, and similar
structures
Pole Climbing
Body Belt
Pole Climbing Strap
Tower Climbing
Tower Climbing with proper person protective equipment
Tower Climbing
Tower Climbing with proper person protective equipment
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
1910.269(g)(2): Fall Protection
Does not address working on: Portions of buildings Electric equipment
(transformers, capacitors) Aerial lifts
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
Special Ladder Special ladder secured in position
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
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
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
Live Line Tools
Live Line Tools
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
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
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
Safety Equipment Inspection
Installation of Rubber Blankets
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
100% Cotton Shirt
100% Cotton Shirt
Synthetic Shirt
Clothing Issue What method are you using to protect
employees from electric arcs and flames? Flame Retardant. Treated. 100% Cotton.
Appropriate weight. Documentation.
Denim Jeans
100% Cotton Sock
Flame Resistant Shirt
1910.269(m): Deenergizing Lines and Equipment for Employee Protection
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
Employee Protection Deenergize line:
Open disconnecting means Tag disconnecting means Test for deenergized conditions Install protective grounds
Employee Protection Work on line Release clearance:
Notify employees Clear employees Remove protective grounds Report to the system operator
Employee Protection Reenergize Line:
Remove tags Close disconnecting
means
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
Grounds
Grounds
Grounding of Lines
Checking Ground Wire
Ground Installation Proper order of connection and
removal: Install ground end first Remove line or equipment end
first
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
1910.269(p):Mechanical Equipment
Mechanical considerations: Inspection Provisions for backing up Roll-over protective structures Outriggers Load ratings
Bucket Truck
Digger Derrick Truck
Bucket Truck
Bucket truck with outriggers fully extended
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
Warning Label on Bucket Truck
Lineman in Bucket
1910.269(p):Mechanical Equipment
Additional precautions: Insulate the lines, or Insulate the mechanical
equipment, or Protect employees from
hazardous differences in potential
Insulating Lines
Insulating Lines
Protecting Employee form Differences in potential
Protecting Employee form Differences in potential
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
1910.269(r): Line - Clearance Tree Trimming Operations
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
Tree Limb Lodged Between Two Energized Lines
Mechanical Equipment Requirements for:
Brush chippers Sprayers Stump cutters Power saws
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.
1910.269(s):Communication Facilities
Microwave Transmission: See 1910.97 Radiation protection guide
Power Line Carrier
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.
Access ladder for Underground Electrical Installation (Vault)
First Aid Training Inside a Vault
1910.269(t): Underground Electrical Installations
Defective cables: Deenergize, if possible Use shield to contain fault
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
Substation Overview
Detailed View of Transformers
Insulators & Connectors
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
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
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
Traffic Control
Warning Sign