Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 219
POCKET BLOW TOUCHFig. 01. … Fig. 92 Fig. 93. Where a feeder loins the mains, a junction box is sunkin the ground, flush with the street level. The conductors ELECTRICAL ENGINEERING 217 and thin tubes enter this box from below. In a threewire system, there are three metallic rings provided in thejunction box, insulated from…
Electrical engineering
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