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 228
7. Complete Panel Board in Steel Cabinet Their rules require that switches have sufficient metal for the neces-sary mechanical strength, and that the temperature rise shall notbe more than 28 degrees centigrade above the surrounding air, whencarrying full rated load continuously. With good contacts… … MQH s p W 9^ S O -5 CO,- o .0- g so ^is ;> O o> ^ MANAGEMENT OF DYNAMO-ELECTRIC MACHINERY 81 conducting wires must be soldered. In practice, lever switches ofless than 30-ampere capacity are seldom manufactured and, onthat size, lugs are usually furnished. Lever switches should be mounted on…
Electrical engineering
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