Experiencing power cuts or your RCD constantly tripping? This 2025 guide explains the most common electrical fault causes in Clapham homes — and when it’s time to call in a qualified electrician.
What Is an RCD and Why Does It Trip?
A Residual Current Device (RCD) is a life-saving safety component inside your fuse board that automatically cuts power when it detects an electrical imbalance. Tripping usually means there’s a potential fault somewhere in your system.
Common Causes of RCD Tripping
- Faulty or damp outdoor sockets and garden lights.
- Worn appliances such as washing machines, kettles, or ovens.
- Neutral-to-earth faults caused by damaged cables or insulation.
- Overloaded circuits with too many devices plugged in.
How to Identify Which Circuit Is Causing the Trip
Try switching all breakers off, then turn them on one by one until the RCD trips again. The circuit that causes the trip is likely to contain the fault. Always stay safe — if in doubt, leave the circuit off and contact a professional.
When to Call an Electrician in Clapham
If your RCD continues to trip or won’t reset, it’s best to arrange professional testing. Electricians use insulation resistance and continuity testing to isolate the fault safely and prevent recurring power loss.
Preventing Future Trips
- Keep outdoor connections dry and weatherproof.
- Replace ageing appliances and damaged extension leads.
- Book periodic electrical inspections (EICR) every 5–10 years.
- Upgrade your consumer unit to modern RCBO protection for better circuit separation.
Areas We Cover
Clapham (SW4), Battersea (SW11), Stockwell (SW9), Brixton (SW2), Balham (SW12), and surrounding South West London postcodes.
FAQs – RCD Tripping in Clapham
Why does my RCD trip randomly at night?
Condensation, outside lighting circuits, or faulty fridges/freezers often trigger nighttime tripping.
Can I reset the RCD myself?
Yes, but only once. If it trips again, leave it off and call an electrician to test safely.
Do RCDs wear out?
Yes — mechanical components can fail over time, particularly in older consumer units. Testing every 6 months is recommended.
Book Professional Fault Finding in Clapham
For persistent tripping or electrical faults, arrange a safe diagnostic visit from a qualified Clapham electrician. Fast, reliable testing and clear remedial solutions.