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 221
rings of leadare put on, oneover the other,with the aid ofhydraulic pressure,squeezing the fibreinto a solid mass. Over this is a layer of jute, treatedwith an impervious compound. A double sheating of ironribbon protects the jute from mechanical injury, and isitself protected against moisture by… … Fig. 95. ELECTRICAL ENGINEERING 219 Tough paper forms an excellent insulating material forelectric light and power cables, but it must be kept perfectlydry, and for this reason is encased in a lead sheathing.Such a cable is especially suitable for alternating currenttransmission because of the very…
Electrical engineering
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