Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 320
rns, single- and double-pole, three-and four-way, and in special designs for turning on the lamps of achandelier one after the other or for controlling small motors or heat-ing devices. The standardized ratings include 125, 250, and 600volts for currents of 3, 5, and 10 amperes in the more… … Fig. 146. Group of Approved Snap Switches switches of all kinds samples are tested by Underwriters Laboratories in the following way: they are connected to control groups oflamps taking full rated current of the switch at full rated voltageand are then put on a special machine which operates them…
Electrical engineering
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