Question 7
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The metal part of an electric kettle gives an electric shock when touched. State two
- Possible causes of the problem;
- Steps that should be taken in diagnosing fault;
- Instruments that can be used for diagnosing the fault.
Observation
(a) - Live conductor touching the frame of the kettle
- Poor or improper earthing.
(b) - Switch off the appliance
- Unplug it from the supply
- Test for earth continuity.
(c) - Insulation resistance tester (megger tester)
- Ohmeter.
- Multimeter (ohm range).
Many candidates who attempted this question did not do well.