Specs, where do I start???
You are very intelligent, but let's try stick to the facts.
Indeed, not all courses teach you to test this way.
Some people take out the line conductor and connect it to the earth bar.
Some croc-clip between MCB and earth bar.
In fact, GN3, which we both like quoting, on page 35, shows a 'temporary link' inserted between the MCB and the Earth Bar for test method 1.
The proper way, of course, is to test R1 + R2 before terminating the circuit into the CU, and connect together as you suggest - isolated L & CPC.
A periodic is supposed to be un-obtrusive i.e. not start disconnecting circuits etc. unnecessarily - maybe thats why they don't insist on a R1 + R2 measurement...............slightly different on a board change, maybe.
I'm sure there are other methods as well - these could all introduce parallel paths to a test that isn't required anyway.
It is a guidance note on Inspection and Testing, giving explanations of what the Regulations require, and methods of inspection and test which may be used to satisfy the Regulations - although you are entitled to use other methods as well.
It refers to the Regulations, but it isn't part of them.
For instance - you don't have to measure Zs the way they tell you to.....it's not a regulation.
And, as it doesn't state anywhere that a measurement of R1 + R2 is required, why would you?
You could 'wander lead' the whole installation to confirm 'Continuity of CPC'.
You didn't have to be so pedantic - I was trying to give a couple of people who weren't sure, a rough guide to the tests, and trying to get them out of the R1 + R2 syndrome.
A lot of people have this 'gotta do an R1 + R2 test' going on.
I included the quote from the ESC Best Practise Guide, so they can make their own minds up on the required tests, but I certainly wouldn't be wasting time doing R1 + R2 tests on PIRs or board changes. :|
You are very intelligent, but let's try stick to the facts.
Not everybody tests this way.
Indeed, not all courses teach you to test this way.
Some people take out the line conductor and connect it to the earth bar.
Some croc-clip between MCB and earth bar.
In fact, GN3, which we both like quoting, on page 35, shows a 'temporary link' inserted between the MCB and the Earth Bar for test method 1.
The proper way, of course, is to test R1 + R2 before terminating the circuit into the CU, and connect together as you suggest - isolated L & CPC.
A periodic is supposed to be un-obtrusive i.e. not start disconnecting circuits etc. unnecessarily - maybe thats why they don't insist on a R1 + R2 measurement...............slightly different on a board change, maybe.
I'm sure there are other methods as well - these could all introduce parallel paths to a test that isn't required anyway.
Yes, we know it's on the 'Schedule of Test Results' - we fill them in often enough - and the regs gives an example of the form - but it's not mentioned in the Regulations (Just to be clear....The numbered regulations)
Guidance Note 3 is not part of the regs.
It is a guidance note on Inspection and Testing, giving explanations of what the Regulations require, and methods of inspection and test which may be used to satisfy the Regulations - although you are entitled to use other methods as well.
It refers to the Regulations, but it isn't part of them.
For instance - you don't have to measure Zs the way they tell you to.....it's not a regulation.
Not if you don't measure R1 + R2 in the first place.
And, as it doesn't state anywhere that a measurement of R1 + R2 is required, why would you?
You could 'wander lead' the whole installation to confirm 'Continuity of CPC'.
You didn't have to be so pedantic - I was trying to give a couple of people who weren't sure, a rough guide to the tests, and trying to get them out of the R1 + R2 syndrome.
A lot of people have this 'gotta do an R1 + R2 test' going on.
I included the quote from the ESC Best Practise Guide, so they can make their own minds up on the required tests, but I certainly wouldn't be wasting time doing R1 + R2 tests on PIRs or board changes. :|
