TUNNEL AND SUBWAY OPERATION
§ 39.471. General requirements.
(a) Tunnel and subway electricians, operators, and others working on or about underground electrical equipment, not in stations, substations, or in underground conduit systems, shall study and strictly observe this section and § § 39.472—39.481 in addition to § § 39.331—39.371, § § 39.411—39.419 and § § 39.431—39.438 so far as they apply to their work.
(b) The value of insulation, insulating covering, as protection from shock is reduced by the dampness usually present in these and similar locations. The restricted spaces often bring the worker closer to equipment and wires than in other kinds of electrical work, and the imperfect illumination also makes special care necessary to avoid contacts. The human body and surrounding surfaces become more conducting if dampness exists, and electrical shocks are therefore more severe.
Cross References This section cited in 34 Pa. Code § 39.461 (relating to general requirements).
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