Testing order

Question 1

There are five ‘dead’ tests listed below, place them in the correct order:
* Continuity of CPCs
* Insultation Resistance
* Polarity
* Mains voltage/ Safe isolation
* Continuity of ring final circuit conductors

Answer 1

The correct order of ‘dead’ tests is as follows:
1. Safe isolation
2. Continuity of CPCs
3. Continuity of ring final circuit conductors
4. Insulation resistance
5. Polarity

Question 2

True or false:
Functional testing of RCDs can be done at any time in the testing order.

Answer 2

False.
This test must be done after establishing that the Earth Fault Impedance of the circuit is low enough to satisfy requirements in order for the RCD to be tested.