Test Selection:
The person undertaking the testing can decide which of the tests are
appropriate and the oder in which they are carried out. They should use their
knowledge and experience of the installation and consult existing records where
available.
Test Sample
Consider this, whilst performing safe isolation of the installation you have
your voltage tester in your hand - so you might as well perform the same tests
on the incoming side of the main switch and confirm supply polarity;
Then, as you have the cover off the board anyway, disconnect the earthing
conductor and measure Ze;
Re-connect the earthing conductor and measure your PFC;
These three tests have took you 5 minutes and you have not moved.
Then onto your sequence of tests - continuity, ring final, IR,
Polarity.
Now, really speaking, you should put the cover back on the board before
re-energising (HSE and all that) - but that's okay, because you are finished in
there and should not have to take it off again.
On with the remaining live tests - Zs, RCD and the functionals.
References:
• https://www.electriciansforums.co.uk/threads/basic-testing-procedures.16621/• http://www.electriciansblog.co.uk/2011/10/periodic-inspection-electrical-testing-procedures/
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