International Library of Technology · Scranton, International Textbook Co. · leaf 649
tion and outlet boxes are now made ofstamped steel and are arranged so that one or more opemings may be made in the side by taking out a small disk.Fig. 32 shows a box of this kind. The conduit enters thebox and, projecting through itabout \ inch, is held in place byan insulation cap a that… … 56 INTERIOR WIRING. 27 knocking out or removing the disks whenever openings areneeded. This avoids the necessity of carrying a large
Electrical engineering
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