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 288
255 132 UNDERWRITERS REQUIREMENTS a fire from any arc resulting from withdrawing the plug. These pockets may be for one or several plugs. Portable equipments for use on theater stages include, in addition to special devices of all sorts—arc lamps, bunch lamps, strip lights, pin plug connectors, and… … Fig. 131. Non-Approved Form of StageArc Lamp Fig. 132. Approved Form of StageArc Lamp modern approved form. These should be of approved pattern,made of non-combustible materials only and fitted with standardstage cable the specifications for which are as follows: To consistof not more than three…
Electrical engineering
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