Irish sparks

[Irish sparks]

How do you find (R1 + R2) in a lighting circuit? Do you just put a link between the breaker and the earth terminal and measuring between live and Earth at any lighting circuit!

 

[Leesparkykent]

Carry out safe isolation, connect Line and cpc together of the circuit you want to measure, null/zero the leads on your low resistance Ohmmeter and measure between line and CPC at each point on the circuit, record the highest reading/value you obtain.

 

[Octopus]

Not being pedantic but make sure that you take the reading between the SL and earth if you also have the loop available.....