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 277
246 UNDERWRITERS REQUIREMENTS 123 In concrete buildings it is often somewhat difRcult to placethe conduits and the boxes so as to clear the reinforcing materialand at the same time keep the metal parts well covered at all points.Special methods have to be adopted varying with the type of con-crete… … Fig. 125. Method of Placing Outlet Boxes in Tile Partitions is very liable to get into the conduit system at the outlets or else-where, and w^hen once this occurs it is difficult to get it out. Itspresence is, however, most objectionable as it tends to injure thepiping by rusting and also to…
Electrical engineering
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