Modern electrical construction; a reliable, practical guide for the beginner in electrical construction, showing the latest approved methods of installing work of all kinds according to the safety rules of the National board of fire underwriters (1905)
Horstmann, Henry C[harles], 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. J. Drake & Co. · leaf 112
a lampswitched in this way isnever safe to handle.There is just as muchdanger from shockswhen the lamp isswitched off as when on.With switches as de-scribed above there is no spark whatever when lamps are switched ofif, but there is usu-ally quite a spark when the lamps are switched in. Should… … Fig. 58. 110 MODERN ELECTRICAL CONSTRUCTION. In handling live wires of this system great care is neces-sary. The wireman should insulate himself from the groundby a dry board, or, if all about him is damp, by a board restingon insulators. Rubber gloves and rubber boots, if kept dry,are useful.…
Electrical engineering
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