Aux 1 Unit 13

Earth Faults

(a) State FIVE causes of earth faults.(5)
(b) Explain how EACH fault stated in part (a) could be rectified.(5)

1.Quiz. Study Notes

Answer

(a) Compare the effects of earth leakage occurring in an earthed distribution system and in an insulated distribution system.(6)
(b) State the reasons why an instrument type earth leakage detector will be fitted in preference to simple earth lamps.(4)

2.Quiz. Study Notes

Answer

With reference to electrical maintenance:
(a) explain the procedure for proving a motor circuit is dead using a multimeter;(5)
(b) explain the procedure for testing the insulation resistance and earth bonding of the motor, giving examples of acceptable readings.(5)

3.Quiz. Study Notes

Answer

Describe TWO methods for detecting earth faults within a distribution system. (10)

4.Quiz. Study Notes

Answer