Ampere Electrical Contracting Est

Ampere Electrical Contracting Est
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Thursday, March 3, 2011

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.

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