International Library of Technology · Scranton, International Textbook Co. · leaf 656
re there are to be many electricconduits, architects usually provide channels in the brick-work in which the conduits can be placed, so as to bringthem behind thesurface of the brick without having to cutthe brick with a chisel after it is in place, which is a labori-ous and objectionable method.… … Fig. 38. and take the ells better. A snake is first run throughthe tube and the wire pulled through by means of it. Thesnake usually consists of a steel ribbon about \ inch wide § 27 INTERIOR WIRING. 63 With a ball about £ inch diameter on the end. If the con-duit has many turns, it is advisable to…
Electrical engineering
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