How to Do Testing For New Installations

 Before Supply is Connected

1. Continuity of Earth conductors {(MEC and CEC) - Main earth conductors and Circuit Earth conductors}. -- Test Procedure: 1
2. Continuity of Main & supplimentary bonding conductors- Test Procedure: 1
3. Continuity of Ring Circuit conductors. ----- Test Procedure: 2
4. Insulation Resistance                      -- Test Procedure: 3
5. Polarity Test                          - Combined with Test: 1
6. Earth Electrode Resistance     --- Test Procedure: 5

After Supply is Connected

1. External Earth fault Loop Impedence Test  ----- Test Procedure: 4
2. Re-confirm Polarity.                                 ------ Test Procedure: 4
3. Earth fault Loop Impedence                      ----- Test Procedure: 4
4. Operation of RCD and earth fault devices. ---- Test Procedure: 4
5. Operation of Switches and Isolators.           ---- Test Procedure: 4
6. Prospective Fault Current Measurement     ---- Test Procedure: 4

 
Instrument and Tools Used

1. Continuity Tester
2. Insulation Tester. ( Megger Meter)
3. Loop Impedence Tester.
4. Probes.
5. Rubber Gloves when applying 500V
6. Earthing terminal 4- pin lead.
7. Isolation Transformer 230/230 Volt for safety Reasons.