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 197
reakers. (Sec Figure 123.) {For installation rules, see Nos. ly and 21.) General Rules. - a. Must be supported on bases of non-combustible, non-absorptive insulating material. b. Cut-outs must be of plug or cartridge type, when notarranged in approved cabinets, so as to obviate any danger ofthe… … Single Pole. Figure 123 Double Pole. meet in practice, at 25 per cent above their rate of voltage andthe fuses rated at 50 per cent above the current for which thecut-out is designed. There is always the possibility of a larger fuse being putin the cut-out than it was designed for. Again, the…
Electrical engineering
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