Initial verification question

[allybally69]

So I've got my 2391... and was always taught and was under the impression that when carrying out R1+R2 tests on all circuits you must carry out the test at all points on the circuit, not the furthest point or a selection of points, I thought the test was to A. Prove a earth path that is suitable and B. Check polarity!

However one of the guys on the firm I work for yesterday has a grumble I was testing all points because it was 'taking too long' should I ignore him and carry on doing it my way or am I doing it wrong

Cheers

 

[Risteard]

I would verify cpc continuity at all points. After all, the purpose of the test is to ensure that it is connected at all points and not just that there's a cpc path to the end of the circuit.

I would only conduct the Zs test at the end of the circuit though, having already proven continuity of the cpc.

 

[Ian1981]

When doing spot checks as QS I have observed that test results have been conducted at the last point of say a lighting circuit but as the permanent live in and out are at the switch then by testing only the last point of the circuit only confirms that the cpc is present at the last point.
I found that a light containing only a switch live and neutral did not have a cpc connected to the means of earthing as it had not been adequately connected at the switch point, so it’s important that it is done at all points.
This was a school job in which all lighting is metallic and as such ,exposed conductive parts.