International Library of Technology · Scranton, International Textbook Co. · leaf 650
ith iron-armored conduit.Outlet boxes are alsomade for use with com-bination fixtures; theyare provided with open-ings for the gas pipe topass through. When a change inthe size of wire is madein a junction box, itis necessary to protectthe branch circuits bya cut-out. Special cut-outs are made… … Fig. 34. 27 INTERIOR WIRING. 57 60. Fig. 36 (a) and (/?) shows the method of mountingan outlet box in a fireproof ceiling. By crossing the ells
Electrical engineering
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