EICR Limitation - no L to N IR Test

[Carlosfandango]

Seriously? You don't even know the alternative Zs test method?

With the circuit isolated at the mcb:
Link L to E at the far end of the circuit
Connect the tester live probe to the incoming L of the RCD
Connect the tester E probe to the outgoing side of the appropriate MCB
Carry out the test.

This way you are testing exactly the same circuit but from a different point within the circuit.

I didn't know that either. Another nugget of knowledge I've learned today!

 

[trev]

There is no reason why this test should be omitted ,especially in a house,where I would of thought it would be no problem isolating all equipment plugged in etc,cheers

A little more difficult in a warehouse though, the roof is 5 or 6 metres from floor level and they don't want to shift things around so you can get access to delamp. For example.

 

[smity]

Thanks for all your replys, In my opinion I think it's a bit lazy not to check in this circunstance but I presume he said to the client it will be an extra £££ to do this and they said well don't bother but I can fully understand in some circumstances and definitely in commercial jobs.

 

[Deleted member 26818]

Was the IR tested by linking the L+N and testing to earth?
I don't have the latest copy of GN3, but I would be very concerned that it would suggest the results of a test can be calculated.
I would also wonder what point would be served by recording such a value?

 

[N6rul]

Thanks

Brilliant tip buddy...

 

[N6rul]

Could you please explain how to do a live Zs test 'correctly' when there is an RCD present?

.

Seriously? You don't even know the alternative Zs test method?

With the circuit isolated at the mcb:
Link L to E at the far end of the circuit
Connect the tester live probe to the incoming L of the RCD
Connect the tester E probe to the outgoing side of the appropriate MCB
Carry out the test.

This way you are testing exactly the same circuit but from a different point within the circuit.

Brilliant tip!!! Thanks