International Library of Technology · Scranton, International Textbook Co. · leaf 639
plate must be surrounded with non-combustible, non-absorptive insulating material,such as glass or porcelain. 42. Great care should be taken to see that the socketsare good, and also that they are strong enough to bear the 27 INTERIOR WIRING. 45 weight of shades. Faulty sockets are more likely to… … fig. 35. INSULATING JOINTS. 43. The insulating joint is the most important elec-trical fitting used in fixture work. Joints are made for allpossible combinations.Fig. 25 shows a verygood style; piece ascrews on to the gaspipe and b to the fix-ture. The parts areseparated by insula-ting material e,…
Electrical engineering
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