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 106
e. TESTING AND TESTING APPARATUS 525 EXAMPLE: A cable 1.45 miles long contained a broken wire. It wasfound that the insulation resistance of the end of this wire was over 10megohms, as was that of the good pair selected to test against it. Theresistance between the two pieces of the good wire was… … •Switch-5ctf I pg. BAD R^/R N GOOD PAIR Fig. 609.—Diagram of connections for reading Tn testing for opens with Leeds and Northrupfault finder, when broken wire and good wire are not in the same cable. Location of Opens.—{Case II) Open wire in telegraph orother cables in which the wires are not…
Electrical engineering
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