An electrician connects the two terminals of the megger to red and yellow conductors of a 4-core cable with RYB and N conductors. It is evident that he is troubleshooting for:
- Earth fault
- Open circuit fault
- Short circuit fault
- Insufficient data
Correct answer: 3. Short circuit fault
Explanation: In present scenario, the electrician is troubleshooting for short circuit fault.
- Short circuit fault: Whenever two conductors of a multi-core cable come in electrical contact with each other due to insulation failure, it is called a short-circuit fault.
- How to check short circuit fault: Megger can be used to check this fault
- Using Megger for short circuit fault troubleshooting: In order to do this, the two terminals of the Megger are connected to any two conductors. If megger gives zero reading, it indicates short-circuit fault between these conductors. The same step is repeated for other conductors taking two at a time.