Electric Reference

- Polarity testing is to ensure that all protective devices are connected in Line conductors of the circuit
- If the test “continuity of circuit protective conductors” has already been completed. Then polarity has been correctly proved

1. Safely Isolate Circuit
2. The ciruit you are testing for polarity shall have the CPC & Line conductors cross-connected at the origin of the circuit (Consumer Unit)

3. At the furtherest point of the circuit you are testing, a test shall be made between the CPC & Line. THis means if testing ed a cokker, the the switch should physically removed and tested on the incoming side of the switch.

4. A further check should be made, by removing the cross connected CPC & Line conductors at the Consumer Unit and performing the same test again (the reading should be high as the circuit is open). This shall proved that you are testing the orrect circuit.

note: this test can be preformed at the ceiling rose on a light circuit, or at the switch