International Library of Technology · Scranton, International Textbook Co. · leaf 576
Fig. 32. Fig. 33. Fig. 34. the mains. Waterproof sockets are also made of porcelain.Sockets of this type are required by the Underwriterswhenever wiring is done in damp places, such as breweries,dye-houses, etc. Fig. 35 (a) and (b) shows two styles of keyless recepta-cles. That shown in Fig. 35 (a)…
Electrical engineering
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