Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 104
ING APPARATUS 523 Before attempting locations for opens it is well to make thefollowing measurements: 1. The insulation of the broken wire and the insulation of thegood wire with which it is to be compared; This may be done as shown in fig. 606. It is best that the insulationresistance be fairly… … SwifchSetfing /V BAD PA/R^ GOOD f^/R Pig. 607.—Diagram of connections in testing for opens with Leeds and Northrup fault finder.The apparatus required consists of fault finder, buzzer, dry cell to operate buzzer, smallinduction coil, and telephone receiver. Connect the battery to the primary of the…
Electrical engineering
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