Method Statement Title: Testing of LV Cables / Wires
1.0 Scope
- Testing of LV Cables / Wires installed in Tower according to the requirement of the Project Specification.
2.0 Material
- XLPE / SWA / PVC cables,
- PVC Insulated Cables and Flexible wires.
3.0 Testing Equipment
- Continuity Tester
- Insulation resistance tester. (Megger)
Note : The Calibration certificates of testing instruments shall be verified to have current certificate, prior to usage.
4.0 Testing and Commissioning Method
4.1 Physical Checks
- Physical checks will be conducted as follow, prior to testing:
- Check the cables are layed properly with proper and adequate support arrangement (i.e. supported in cable trays, trunking, ladder etc.) properly layed, dressed and cleated/tied with cable cleats/ties.
- Check the cable support arrangements are fixed to the building structure rigidly.
- Check the Identifications and labeling are provided according to the specification and DEWA requirement.
- Check the glanding and gland earthing termination is correct.
- Check if there are any physical damages. Replace as required if any major damages are noticed.
4.2 Insulation Resistance Test
- Insulation resistance test will be done by applying 0.5kV for the below mentioned points with suitable insulation resistance tester (Megger).
- Phase to Phase.
- Phase to Neutral.
- Phases to Earth.
- Record all results and details as per attached format. The readings to be verified with permissible limits.
- Phase rotation test shall be conducted after energisation.
- Check if there is any over heating of cables after a 2 hours of energisation.
- Suitable corrective action shall be taken if any discrepancies are found.
- Inspection requests shall be raised for consultant to witness the testing (random test).
5.0 Records
5.1 Inspection request duly signed-off by NMX and Consultant.
- Attachment
- Cable continuity and Insulation test report .