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 258
Fig. 104. Approved Wiring Systemon Entering Building 229 106 UNDERWRITERS REQUIREMENTS From the service cabinet and meter as many circuits are run asmay be required to feed the lamps and other devices to be connected, … Fig. 105. Knob and Tube Wiring in Floor each being fused at the service center unless there is no change at thatpoint in the size of wires. These circuits will pass up through thefloor within porcelain tubes and will thence be carried on porcelainknobs fastened to the timbers and studding not more…
Electrical engineering
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