Modern electrical construction; a reliable, practical guide for the beginner in electrical construction, showing the latest approved methods of installing work of all kinds according to the safety rules of the National board of fire underwriters (1905)
Horstmann, Henry C[harles], 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. J. Drake & Co. · leaf 143
ue too much, giving thenut a chance to work itself diagonally across it, so as to comein contact with both wires and, in time perhaps, cause shortcircuits. Although toggle bolts are mostly used, screws havebeen successfully used in tile. It is only necessary to firstdrill a hole of just the proper… … Figure 89 the capping hides the botch work. Such work will not bepassed by inspectors if noticed. The proper way of fittingmoulding is shown in Figure 88. LOW POTENTIAL SYSTEMS. 141 Figure 89 shows methods of running round corners. Thesaw cuts, a, b, c, etc., should be made with a fine saw and…
Electrical engineering
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