International Library of Technology · Scranton, International Textbook Co. · leaf 443
out of communication withthe trolley wire when it is desired to inspect or work on anyof the controlling devices. A motorman should never try toadjust a controller finger or to replace a broken motor brushwithout first throwing the canopy switch handle to the off-position. 11. Westingliouse Canopy… … Fig. 13. which the switch can be fastened to a wooden baseboardscrewed to the under side of the bonnet. The iron covercan be taken off by taking out the three screws «, «, a,exposing the inside to view. These switches are sometimescalled upon to break currents from 200 to 300 amperes, and §25…
Electrical engineering
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