Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 136
allel service connection. Sen,4ce wires tapped to the main wires, are ruri to insu-lators on an auxiliar> cross arm, thence to insulators on the side of the building, andthrough the drain tube to the service switch. 824 HAWKINS ELECTRICITY on the cross arm so as to prevent the service main… … Fig. 974.—Joint pole crossing, showing wires of two lines crossing each other. Four guardwires (shown heavier than the others) extend for one span either side of the joint poleparallel to the wires of the lower circuits and protect them from contact in case of a breakin the wires of the upper…
Electrical engineering
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