Electrical Installation Condition Report

Acceptable? If agreed with the client, yes.

Presumably there has been a L-N insulation test done at 250volts, others may have been done (l-e/n-e), but gave low results due to electronics in the circuit, 

so they have put that down as a limitation.

I've found recently that is is harder now than ever to get insulation testing done, as so much commercial lighting is controlled by other ways, not a single switch now, hence there is the chance of a N-E fault showing, or, damage to the equipment if not done correctly. Even when joining L+N, then testing to E gives a low reading, so, the only way of testing the circuit is to take out all of the fittings, then test the fixed wire connections between them. This is very time consuming, and gives rise to introducing faults when you put it back together, so a compromise is needed.

Global insulation test of the whole installation at the main switch between the coupled lives and earth with hopefully a test result of more than a couple of megaohms resistance. 

No live to live insulation test. 


Whoever wrote that report isn't any good at fudging the test results, suggesting that they weren't sure of what to do in the first place .