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), 1833-1928 · New York : T. Audel & Co. · leaf 238
s a service switch cannot be so locatedthat it may be conveniently opened at night, or at other times whenthe elevator is idle for considerable periods. This condition is frequentlymet with in over mounted installations, and unless some provision bemade for opening the circuit to the motor from the…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
