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 265
le for interior wiring consists ofdouble-braided, rubber-insulated, twin wires, covered with a spiralsteel strip armor which protects the conductors from injury and isat the same time flexible. It is largely used in wiring old buildingssince it can be drawn into concealed spaces without fear of… … Fig. 112. Armored Cable and Fittings With armored cable all joints must be made at outlets or in cabinetsor junction boxes which are always accessible. No taps or jointsare permissible except at such outlets or boxes. Great care shouldbe taken to secure the armor very firmly to all outlet boxes in…
Electrical engineering
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