Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 200
prevent the absorptionof moisture. Entrance Wires. Where the service wires enter a build-ing thev should have drip loops outside, and the holes throughwhich the conductors pass should be bushed with non-combustible,non-absorptive insulating tubes slanting upward toward the in-side. See Fig. H.… … SUPPORTING NN \ \INSULATORS 1\ \ Fig. 5. 176 ELECTRIC WIRING 25 tion, unless expensive special construction, such as the transposingof the lighting circuits, be resorted to at regular intervals. Evenunder these conditions it is bad practice, as an accidental contactwith the lighting or power…
Electrical engineering
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