OP
RETIREDSPARKY
How to fail section B. Not measuring the continuity of earthing conductor. not removing parallel paths. Not testing to the the pipework when testing the bonding continuity. Not testing the integrity of the cpc at all points on the S-plan.Not proving polarity on all circuits. Not performing all three steps on the ring cct.Not verifying your ring cct values. Not removing equipment that could be damaged with 500V dc.Not testing the lighting [two way and intermediate] as stated in the GN3 insulation resistance. Testing ring [3 tests] and sy cable 6 tests. Not disconnecting earthing conductor when testing Ze. Not re-connecting said conductor when testing for PFC. Not testing PEFC and PSCC take highest value and multiply by 2. Not recording values correctly on SOTR. Not carrying phase sequence. Just a few point to watch for. If you follow GN3 you'll be OK.