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 194
ed on glass or por-celain insulators, not more than 15 feet apart. Where not exposed toweather, porcelain knobs may be used if not more than 4^ feet apart.Trolley JJires. Trolley wires must be of ample size for mechanicalstrength (No. 0 B. & S. gauge copper or No. 4 B. & S. gauge… … Fig. 45. Section of Approved Conduit WiringSiiowing Provision Against Moisture 170 UNDERWRITERS REQUIREMENTS 49 of fire on the railway route, the current may be cut off from theparticular section and not interfere with the work of the firemen. Electrolysis. Whenever an electric current passes…
Electrical engineering
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