How to Test an RCD
Quick Answer
Press the test button on the RCD - it should trip instantly. If it does not, call an electrician immediately.
How to troubleshoot How to Test an RCD
RCDs are vital safety devices that prevent electric shock. This guide covers testing your RCD using the test button.
Step-by-Step Fix
- Locate your consumer unit and identify the RCD (usually marked with a T or Test button).
- Press the test button firmly - the RCD should trip instantly.
- Reset the RCD by pushing the switch back to the ON position.
- If the RCD does not trip, it may be faulty and require replacement.
- Test quarterly to ensure continued protection.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| RCD does not trip | Faulty RCD | Contact a qualified electrician to replace the RCD immediately. |
| RCD trips on reset | Earth fault on circuit | Check appliances on the circuit and isolate the faulty device. |
Frequently Asked Questions
How often should I test my RCD?
Every 3 months to ensure it is working correctly.
What does RCD stand for?
Residual Current Device - it protects against electric shock.