minor works insulation ressistance

[slocm3105]

You should always test the whole circuit. As previously mentioned you put your work(no matter how good it is) onto a dangerous circuit, you will be held responsible if it should cause any danger to persons, livestock or damage to the property. Always test the whole circuit.

 

[jammy]

....if i am upgrading/replacing an existing fixed appliance, do i still need to test the circuit? i cannot see the spur for the current piece of equipment, the mains supply runs through the wall into the garage the other side, maybe to dist. board directly or spurred off from something else...( i did'nt check whilst onsite, silly me ), it was installed in 1992.. it is an alarm system....

 

[Des 56]

The insulation resistance test is for the whole of the installation
It seems a bit pointless testing a bit thats been added on and getting a 200+ reading when the insulation resistance of the whole may be much lower

 

[xraytek]

My vote is also for the reading of the whole circuit (including existing) to be recorded.
If you are spurring from a ring then you are modifying the ring circuit, not creating a new one.

The insulation test result should be that of the ring, and Zs result be the highest reading on the circuit so not nessassarily just the spur you have added.

Or at least that is my opinion.