34 Pa. Code § 39.185 - Guarding live parts
(a)
Current-carrying parts of arresters on circuits above 750 volts, unless
effectively isolated by elevation, shall be adequately guarded to protect
persons from inadvertent contact with them, or from injury by arcing.
(b) Lightning arresters, unless provided with
disconnectors, which are always opened before work is done on the arresters
shall be so arranged that necessary adjustments are possible, without approach
to current-carrying parts, through the use of permanently grounded mechanisms
or suitable insulating appliances. If it is necessary that charging or
adjustments be made with arresters alive, permanently grounded mechanisms or
suitable insulating appliances shall always be provided.
Notes
This section cited in 34 Pa. Code § 39.201 (relating to storage batteries, transformers and lightning arresters).
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