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 233
M Fig. 74. Correctly Mounted CombinationFixture 204 UNDERWRITERS REQUIREMENTS 83 in any way with any grounded metal work. Thus in bath rooms if aperson attempted to turn on a lamp by means of the key of a brasscovered socket while at the same time he was touching a water pipeor faucet, he might… … Fig. 75. Result of Defective Fixture Insulating Joint numerous instances where persons have been killed and it is cer-tainly wise to prevent even the chance of such an accident by eitherusing all porcelain sockets or by putting the sockets out of reach,and controlling the lamps by means of a switch…
Electrical engineering
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