International Library of Technology · Scranton, International Textbook Co. · leaf 400
owever, 32 ELECTRIC LIGHTING. 18 used for interior illumination in some large concerns where alarge number of lights must be operated. Enclosed-arc lampsare operated in parallel by connecting them, directly acrossthe line, as indicated in Fig. 20. Each lamp is here pro-vided with a double-pole… … Line. x£M.FCcm/-a/7f. (WV\AH AM/W^T Fig. 20. shown, when it is wished to control the lamp from a dis-tant point. Of course, the switch is arranged to open thecircuit through the lamp, and not short-circuit it, as whencutting out a series lamp. Fig. 21 shows the lamps connected to an ordinary…
Electrical engineering
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