§ 70-1135. Load center
Purdon's Pennsylvania Statutes and Consolidated StatutesTitle 52 P.S. Mines and Mining
52 P.S. § 70-1135
§ 70-1135. Load center
Transmission voltage shall be reduced to machine utilization voltage by a portable transformer or load center of adequate capacity for the equipment powered by it. The transformer shall be of the dry type, ventilated, nonventilated, or sealed, substantially constructed and completely enclosed in a metal case. The metal enclosure shall be connected to the high voltage system ground conductor in the high voltage cable. Complete load center construction shall render it essentially fireproof. In addition to these requirements, the following shall be observed:
(1) Connection of the high voltage cable to the load center shall be made through a cable coupler of the type described in subsection (c) of section 1134.1
(3) The restriction of subsection (5) of section 1132 of article XI2 pertaining to transformer connections and use of “zig-zag” grounding transformers also apply to the load center.
(4) The transformer secondary neutral of load center transformers, direct or derived, shall be connected to machine trailing cable safety ground conductors through a ground current limiting resistor capable of limiting ground fault current to twenty-five amperes or less. The inby side of this resistor shall be grounded to the load center frame.
(5) The load center shall be equipped with a main secondary breaker of adequate interrupting capacity with tripping devices which shall feed individual machine breakers located either in the load center or external to it in a separate distribution center. External utilization voltage connections shall be made through receptacles so arranged that they cannot be uncoupled under load.
Credits
1965, Nov. 10, P.L. 721, No. 346, art. XI, § 1135.
52 P.S. § 70-1135, PA ST 52 P.S. § 70-1135
Current through Act 11 of the 2024 Regular Session. Some statute sections may be more current, see credits for details.
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