International Library of Technology · Scranton, International Textbook Co. · leaf 454
current may be cut off at anytime. These switches must be substantially made, must bemounted on incombustible bases, and must be placed wherethey may be easily reached by policemen and firemen.There are many different types of these cut-out switches,but they should all have good contacts and be… … fig. so. Fig. 51. illustrate the operation of cut-out switches in general. Theparts here shown are mounted in a waterproof cast-iron boxwith an opening past which an indicator moves to showwhen the current is on or off. Fig. 51 shows the external appearance of the switch.Two blades a, b, Fig. 50,…
Electrical engineering
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