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
Figure 87 Figure 88 more than ordinary care is exercised). Many wiremen arecareless and cut away the middle tongue 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…
Electrical engineering
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