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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 310

An illustration from 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, leaf 310
Fig. 130. Common Tvpe of()utlet Box 277 154 UNDERWRITERS REQUIREMENTS Set screw connections have been found unsatisfactory as theyloosen with the vibration of buildings and with changes of tempera-ture, and only regular screwed thread joints or substantial clampsshould be used at all conduit and…

Electrical engineering

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