完工證明書WR1
What is WR1? An Introduction to the Certificate of Completion
WR1 is a Certificate of Completion primarily used to confirm the safety and compliance of fixed electrical installations. According to the Electricity (Wiring) Regulations, registered electrical workers responsible for repairing, modifying, or adding to electrical installations must inspect and test the installation upon completing the work.
After completing the inspection and testing, they are required to issue the WR1 Certificate to certify that the electrical installation meets the technical and safety standards.
When is a WR1 Certificate Required?
New Meter Installation or Power Supply Application
When a property applies for a new electricity meter or power supply service, a WR1 certificate must be submitted to certify that the electrical work complies with safety standards.
Replacement or Upgrade of Electrical Equipment
- Replacement of distribution boards
- Replacement of wires or sockets
- Upgrading the electrical system (e.g., increasing load capacity)
After completing such work, a WR1 certificate must be issued.
Major Repairs or Modifications
Major repairs or modifications to the electrical system (e.g., rewiring) require a WR1 certificate to confirm the work has been completed and is safe for use.
Inspection and Testing
After installing, modifying, or repairing any electrical installation, the registered electrical worker must conduct inspections and tests. A WR1 certificate is then issued to verify the safety and compliance of the installation.
WR1 Certificate
1. Inspection of the Distribution Box
- Verify that each Miniature Circuit Breaker (MCB) corresponds to wires of appropriate thickness that meet legal requirements.
- Check that all wires are securely fastened.
2. Wire Color Code Inspection
- Ensure that the colors of the wires inside the distribution box comply with the required standards.
- Place an electricity hazard warning label on the front of the distribution box door.
3. Insulation Resistance Testing
- Inspect the insulation resistance of the wires.
- Test the leakage protection time and values of power sockets.
4. Grounding Requirements
- Ensure that water pipes, gas pipes, fire hoses, and other elements are independently connected to the ground wire of the unit’s distribution box.
- Attach a grounding terminal tag to confirm proper grounding.
