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 287
Fig. 128. Section of Theater Footlights Stage Pockets. Stage pockets (see Fig. 130) are iron boxes,having trap doors flush with the stage floor and containing receptacles … Fig. 129. Section of Theater Borders for special plugs and cables by means of which arc lamps, flood lamps,and other temporary and portable devices may be connected. The circuits should have a capacity ofat least 35 amperes for arc lampsor 15 amperes for incandescentlamps, wired to the full…
Electrical engineering
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