§ 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.
(c) Guarding shall comply with § § 39.105 and 39.143 (relating to guarding live parts; isolation by elevation).
Cross References This section cited in 34 Pa. Code § 39.201 (relating to storage batteries, transformers and lightning arresters).
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