Which of the following faults is most likely to occur in cables?

Which of the following faults is most likely to occur in cables?

Right Answer is:

All of the above

SOLUTION

Most of the distribution and part transmission of electrical power is nowadays carried out through underground cables because of several advantages over the over-head system. Many times locating a fault becomes a difficult task because the cable is hurried under the ground and is not accessible. The faults which are most likely to occur are :

  1. Ground fault: A breakdown of the insulation of the cable which allows current to flow from core to earth or to cable sheath.
  2. Short circuit fault: A cross or short circuit between two cables or between two cores of a multicore cable.
  3. Open circuit: Where the conductor becomes broken or a joint pulls-out. The method for locating an open circuit fault differs from those used for the other two faults. Amongst various methods used for localizing cable faults. Murray loop test is very common and is described here.
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