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 170
s. a. Must have a cut-out (see No. 17 a) for each lamp oreach series of lamps. The branch conductors should have a carrying capacityabout 50 per cent, in excess of the normal current required bythe lamp to provide for heavy current required when lamp isstarted or when carbons become stuck without… … Figure 101 volts. A steadying resistance, R, is always placed in serieswith constant potential lamps, its object being to keep downthe current while the lamp feeds. During the short time thatthe two carbons are together, the resistance of the lamp is solow that an enormous amount of current would…
Electrical engineering
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