Why Your RCD Keeps Tripping (And What To Do)
If your power suddenly cuts out and you find yourself heading to the switchboard to reset a switch, chances are your RCD has tripped. This is a common issue in homes around Wellington and the Kāpiti Coast, and while it can be frustrating, it’s usually a sign that your safety system is doing exactly what it’s meant to do.
An RCD, or Residual Current Device, is designed to protect you from electric shock. It constantly monitors the flow of electricity through a circuit and quickly shuts off power if it detects a fault or current leakage. This helps prevent serious injury, electrical fires, and damage to your home.
Why Does an RCD Trip?
There are several common reasons your RCD may trip.
- Faulty Appliances
Appliances are often the culprit. Older or damaged appliances can leak small amounts of electricity, which causes the RCD to shut off power. Items like kettles, heaters, washing machines, or outdoor equipment exposed to moisture are common causes.
- Water or Moisture Exposure
Water and electricity don’t mix. Outdoor sockets, garden lighting, or equipment exposed to rain or damp conditions can cause faults, particularly in Wellington’s windy and wet weather.
- Overloaded Circuits
Plugging too many high-powered appliances into one circuit can sometimes cause issues, especially in older homes where circuits weren’t designed for modern electrical demand.
- Wiring or Installation Faults
Damaged cables, loose wiring connections, or ageing electrical installations can also lead to repeated tripping. Sometimes faults aren’t immediately obvious and require testing to locate.
What Should You Do When It Trips?
First, try resetting the RCD at your switchboard. If it trips again straight away, unplug appliances on that circuit and try resetting it once more.
Then plug appliances back in one at a time until you identify what causes the trip. If one appliance causes the issue repeatedly, it likely needs repair or replacement.
If the RCD still trips with everything unplugged, the problem may lie within the wiring or electrical system itself.
When to Call an Electrician
If your RCD trips frequently, won’t reset, or you can’t identify the cause, it’s time to call a professional. Electrical faults can sometimes be hidden behind walls or in ceilings, and professional testing ensures the issue is safely resolved.
At Cableworks Electrical, we regularly help homeowners across Wellington and the Kāpiti Coast diagnose and fix nuisance tripping and electrical faults. Our goal is not just to get your power back on, but to ensure your home remains safe and reliable long term.
The Good News
While repeated tripping can be annoying, it’s reassuring to know your safety system is working. RCDs save lives every year, and a quick investigation usually identifies the problem.
If your switchboard is giving you grief, the Cableworks Electrical team is always happy to help get things running smoothly again.