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 260
Fig. 107. Knob and Tube Wiring Showing Objectionable Features is objectionable and knobs should have been used instead. It isvery desirable to use metal outlet boxes at all outlets and the addedexpense of so doing is not large. Where flush switches or receptacles 231 108 UNDERWRITERS REQUIREMENTS … ^^^^B?_^^ -i^ ^H||HH|| ^a 1 1 HmBIiMit tii ^^^ n 1 1 VWt5t (311 11 1 Skj^^hv ^^i^J i 1 ~f-i .,Mm^ 1 PPi ^m I N- 1 WlJ 1 1 ■Hfc*! ii 11 ^H^M^^/l I 9HtiRaii^^^i«!^^R 1 Fig. 108. Proper Use of Outlet Boxes Fig. 109. Wiring in Partitions Showing Use ofPorcelain Tubes 232 UNDERWRITERS REQUIREMENTS 109…
Electrical engineering
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