International Library of Technology · Scranton, International Textbook Co. · leaf 571
ur differ-ent sized grooves sothat it will accommo-date wires of variousthicknesses. Fig. 28shows a double-headedtube used when wirescross each other. Por-celain tubes should al-ways be used wherecrossings of this kindoccur. The tube, Fig.22, is frequently usedfor this purpose; butif this is done,… … Fig. 29. 48 INTERIOR WIRING. §26 ceiling and the lamp is hung from the cap b. The linesare attached to the terminals c, c and the lamp cord tod, d; /,/ are the small fuses. When the cover b is attachedto a by a twisting movement, terminals g, g lock with h, h!and make the connection from the mains…
Electrical engineering
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