International Library of Technology · Scranton, International Textbook Co. · leaf 319
rcuit-breaker; it mustthen be connected to the streetwires by means of a jumper thatpasses through a switch placedoutside of the building, so that incase of fire the whole house wiringcan be disconnected. The wiresin the house are supported onbarn hangers made for this classof work (see Fig. 17).… … Fig. 17. §23 ELECTRIC RAILWAYS. 39 barns, the trolley wire is run in an inverted wooden troughplaced over it, and the hangers are screwed to the bottomof this trough. In such a case, the trough generally catchesthe wheel if for any reason it leaves the wire; it also servesas an insulated support…
Electrical engineering
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