Appendix L: Safe Work Rule Description
- Positively ensure
the correct circuit is identified before lockout and
tagout: Almost every week, some electrician or technician is hurt
in the United States because the breaker he/she locked out was the wrong
one. This is type of accident is so easily preventable, yet it
is far too common. Before you lock out a circuit breaker or power
disconnect switch, check that you are locking out the correct breaker
--- the one that controls the equipment on which you will be working.
Breaker off, the equipment stops. Breaker on, the equipment runs.
Then, and only then, lock it out!
- Whenever possible
de-energize the equipment before testing: Conduct tests with the
electrical equipment deenergized, or, if there is no other way to perform
the test, with reduced hazard.
- The employee
in charge must conduct a briefing before all energized electrical work: Before starting any energized electrical work the supervisor
or his/her designee, must conduct a job briefing with the employee(s)
performing the work.
- Identify hazards
and anticipate problems: Think through what might go wrong and the
consequences of that action. Do not hesitate to discuss any situation
or question with your supervisor and coworkers.
“hurry-up” pressure: Program pressures should not cause you
to bypass thoughtful consideration and planned procedures.
- Don’t hesitate
to use the Stop Work Policy: LBNL has a stop work policy (PUB 3000,
Chapter 1.5) Do not hesitate to use it if you see a fellow worker performing
- Always consider
electrical equipment energized unless positively proven
otherwise: When working on electrical equipment, treat the equipment
as live until it is tested, locked, tagged, shorted, and/or grounded,
- Use suitably
rated electrical devices only as intended: Electrical devices shall
be fully rated for the system to be tested, and must not be modified
beyond the intent of their design.
- Remove or cover
all jewelry before performing energized electrical work: This includes rings, watches, or metal pendants and chains that could
inadvertently fall into the work. Metal-framed glasses must be restrained
when working around electrical equipment.
- Know how to
shut down equipment in an emergency: Know the location, and operation of, emergency disconnects for all sources
of power to equipment before beginning energized work.
- Know LBNL emergency
procedures: All persons working in areas of high hazard (with high-voltage power supplies, capacitor banks, etc.) must be trained in emergency
response procedures, which should include cardiopulmonary resuscitation
- Design for safety: Consider safety to be an integral part of the design process. Protective
devices, warning signs, and administrative procedures are supplements
to good design—not a substitute for it. Engineering controls are always
preferable to administrative controls. Completed designs should include
provisions for safe maintenance.
- Reset circuit
breakers only after the trip problem has been corrected: When a
circuit breaker or other over current device trips, it is usually due
to an overload or fault condition on the line. Repeated attempts to
re-energize the breaker under these conditions may cause the breaker
to explode. Do not attempt to reset a circuit breaker unless the problem
has first been identified and corrected or isolated.
- Maintain the
protection of covers, barriers and shielding: When you remove a
panel or cover for access (a barrier), replace it with a temporary barrier
to restore at least some of your protection. This could be a transparent
Lexan sheet, a rubber sheet or blanket, etc., place over the portions
of the equipment under test to which you do not need access.
drill into a wall or floor slab without Facilities approval. See Admin 053 Facilities Penetration Policy.
When drilling into a wall or floor, wear suitable PPE for the working
conditions (dirt, slurry, debris) in case of an unknown electrical hazard.
At a minimum, this will include safety glasses, hard hats, all leather
shoes, and fully rated gloves.
modify or penetrate premises wiring conduit or enclosed wireways: Only qualified and authorized Facilities
Department personnel are allowed to work on premises wiring, conduits
or enclosed wiring. See Section 8.8.4.
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