International Library of Technology · Scranton, International Textbook Co. · leaf 324
heostat ar-ranged in this way. The oneshown is of the enamel type,in which the wire is made upinto flat zigzag coils and embed-ded in enamel on the back ofa ribbed iron plate. This holdsthe wire securely in place andat the same time allows it toimpart the heat generated to theribbed iron plate,… … § 17 ELECTRIC LIGHTING. 33 GROUND DETECTORS. 27. It is necessary to have some device by means ofwhich grounds on the system may be detected. A volt-meter makes a very good ground detector, because it not
Electrical engineering
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