Report of Proceedings of the American Mining Congress Thirteenth Annual Session
Report of Proceedings of the American Mining Congress Thirteenth Annual Session
Cal American Mining Congress 13th 1910 Los Angele
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All joints in insulated wire shall, after the joint is complete, be reinsulated to at least the same extent as the remainder of the wire. INSULATION AND COVERING: (46) All high voltage conductors inside of the mines shall be in the form of insulated lead-covered or armored cables, subject to ap- proved insulation tests, and having carrying capacities in accordance with paragraph No. 35, Section III. (47) Where lead covered or armored cable is used, the lead or armor shall be electrically contin...uous throughout, and shall be effi- ciently grounded. CABLES ENTERING FITTINGS: (48) The exposed ends of cables where they enter fittings of any description, shall be so protected and finished off that moisture cannot enter the cable, or the insulating material, if of an oily or viscous na- ture, leak out. (49) Where unarmored cables or wires pass through metal frames, or Into boxes or motor casings, the holes shall be substantially bushed with insulating bushings, and, where necessary, with gas tight bushings which cannot readily become displaced.
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