[quote author=ChubbyPhaseWire link=1090322505/0#11 date=1090527234]Where metallic enclosures have been used as the protective
conductors, e.g. conduit, trunking, steel-wire armouring etc the
following procedure should be followed:
(i) inspect the enclosure along its length for soundness of
construction
(ii) perform the standard ohmmeter test using the appropriate test
method described above.
Instrument: Use a low-resistance ohmmeter for this test. [/quote]
That covers the continuity but you have to do insulation resistance to earth conductors and between live conductors. That's the one where real care has to be taken with testing. don't want to 'Megger' the shop cat or the boss won't pay.