Insulation resistance test on a EICR/PIR

[oldtimer]

View attachment 17645

this is pic 1 as per my original post

test carried out with L/N joined to Earth and no need to disconnect loads/vunerable devices

pic1 to test whole insulation, shows link between L/N (incoming) at main switch with supply isolated.

Q. if linked on incoming side of main switch and switch is off, then i wouldnt be testing pass the switch, would i? also if linking on incoming side then i am working live?

This drawing is wrong as you say you are on the incoming side of the switch where 99% of the time is live due to no local DNO isolator being available in this case I have made up a jump lead with croc clips on it and yes the main switch should be off and even then you need to test the dead side to confirm it is safe

 

[richard1972]

thanks for everyones help with this, i was doubting what i knew, because i am new to testing and inspecting.