Electric Reference

1. Safely isolate the supply
2. Disconnect one end of the conductor, preferably the end at the consumer unit.
3. (Null out test leads) or ( record and remember to subtract from end result)
4. Connect one test lead at the consumer unit’s disconnected end
5. Connect the other test lead to the metal work of which the conductor you are testing is connected to (ensure any painted metal work has been scratched off, to make a solid connection) by not connecting it to the clamp will prove that the integrity of that clamp is efficient enough/correct BS 951
6. Test
 - the result will give the total resistance of the conductor (remembering to subtract the test lead resistance, if not previously nulled out)
7. Re connect bonding conductor