Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 215
ut-outand this should be thoroughly cleaned and tested. Adefective cut-out generally results in burned out coils. Arc Lamps 211 SERIES ARC SWITCHBOARDS The switching of series arc light circuits is a prob-lem altogether different from any other. At the pres-ent time, very few new systems of this… … Ov^ Figure 138 are two horizontal rows of holes, one at the right andone at the left for each machine. There are also tw^overtical bars containing holes for each circuit on theboard. The board may be built for any number ofcircuits or machines. The low^er row^ of holes is extraand is provided to…
Electrical engineering · Electric testing
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