Zs testing on a light circuit.

[Octopus]

Hi,

Need some help on Zs testing on lighting circuits.

I am an electricians mate, recently passed my 2330 and 2392 test/inspection. I have been doing live testing on a lighting circuit and when I test earth and phase on earth loop I seem to always get trip on my megger testers. As I havent been testing long im not sure if im doing something wrong so any help would be great. I know lots of people say you shouldnt live test but I'm working in pubs where you cant dead test to get R1 + R2 readings.

I am not as experienced as you guys so please explain it in a way I can understand.

Many thanks

Jonny.

1. As you are the "mate" couldn't you get your gaffer to show you? or try it at home first?

2. I wouldn't recommend getting a R1 + R2 on a live circuit.