Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 214
s is done four times.If the wire has a copper color after the fourth time, itis a proof that the iron is exposed and that the zinc wastoo thin. The wire must show black. Insulation 160. An electriccurrent returns to itssource by the easiestpossible path, or alongthe line of least resis-tance. The… … Fig. 88. 212 MODERN ELECTRICITY force, provision must be made against any portion of ittaking a short circuit, that is returning to its source throughthe ground. In fig. 88 imperfect insulation of a telephone ortelegraph conductor causes portions of the current to short-circuit down the poles P P…
Electrical engineering
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