International Library of Technology · Scranton, International Textbook Co. · leaf 343
are made 2 inchesthick with a bevel around the edge of 4 inch or 4 inch. §17 ELECTRIC LIGHTING. 51 They are supported by bolting to angle irons, z, z, Fig. 55,and are stood out from the wall by means of braces b, b.Station boards built up as shown in Fig. 55 are usually about90 inches high. It has… … Pig. 55. panels ; those carrying the instruments for the feeders asfeeder panels. This system allows the board to be easilyextended as the plant grows in size, as additional panels canbe added to those already in use. The extra panels areattached to those already installed, as indicated by…
Electrical engineering
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