Numerical - Fault distance from testing end of cables for given ratio of testing network

Q.  In a test by Murray loop for ground fault on 500 m of cable having a resistance of 1.6 Ω / km, the faulty cable is looped with the sound cable of some length and area of cross section. If the ratio of the other two arms of the testing network at balance is 3:1, what is the distance of fault from the testing end of cables?
- Published on 24 Nov 15

a. 100 m
b. 200 m
c. 250 m
d. 300 m

ANSWER: 250 m

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