WAC 296-304-120
Electrical machinery -- Electrical circuits
and distribution boards. (1) Before an employee is permitted to
work on an electrical circuit, except when the circuit must
remain energized for testing and adjusting, the circuit shall be
deenergized and checked at the point at which the work is to be
done to insure that it is actually deenergized. When testing or
adjusting an energized circuit a rubber mat, duck board, or other
suitable insulation shall be used underfoot where an insulated
deck does not exist.
(2) Deenergizing the circuit shall be accomplished by
opening the circuit breaker, opening the switch, or removing the
fuse, whichever method is appropriate. The circuit breaker,
switch, or fuse location shall be tagged to indicate that an
employee is working on the circuit. Such tags shall not be
removed nor the circuit energized until it is definitely
determined that the work on the circuit has been completed.
(3) When work is performed immediately adjacent to an
open-front energized board or in back of an energized board, the
board shall be covered or some other equally safe means shall be
used to prevent contact with any of the energized parts.
Note:
WAC 296-304-120 is applicable only to shipbuilding and ship repairing.