An RCD that keeps tripping is responding to an electrical imbalance that needs investigation. Repeated resetting is not a repair: record what happened and arrange help with the affected equipment or circuit.
In this guide
Identify the device from its visible label
An RCD monitors the balance of current flowing through a circuit. A circuit breaker responds to overcurrent, and some devices combine both functions. From outside the closed switchboard, note the device label and the circuit name if you can read them safely.
You do not need to identify the technical fault before calling us. Our residential electrical team can investigate the installation and explain which device is operating.
Respond to warning signs first
If there is a burning smell, visible damage, unusual heat, water around electrical equipment or an electric shock, stop using the affected equipment and keep people clear. Seek urgent electrical assistance. For smoke or fire, move to safety and call 111.
Do not remove switchboard covers, open sockets or touch damaged cables. Do not hold a device on, bypass it or repeatedly reset it. Leave fault-finding inside the installation to an electrician.
Record what was happening
A useful report explains the circumstances without trying to recreate the fault. Note whether the trip happened when something started, during wet weather, after cleaning or after recent electrical work. Tell us which rooms lost power and which appliances were already in use.
- Date and approximate time of each trip.
- Visible device and circuit labels.
- Equipment in use, including outdoor appliances.
- Recent changes, building work or water exposure.
- Whether the same pattern has happened before.
Why the cause needs testing
Possible causes include a faulty appliance, moisture or a problem with the fixed wiring. Several small leakage currents can also contribute to an RCD operating. The timing alone does not show which cause applies, so replacing the device without testing may leave the problem unresolved.
If lights also flicker, describe that separately using our flickering-light fault report. A clear sequence of symptoms is more useful than guessing that the board is too old.
Make the visit easier to arrange
Tell us if the loss of power affects essential equipment, a fridge, a work area or a tenant. Explain access arrangements and provide any previous electrical reports. Keep the area around the switchboard accessible without moving or touching damaged equipment.
If assessment identifies a need for board work, our switchboard quote guide explains how repairs and an upgrade should be scoped separately. Testing will show whether a repair or wider board work is needed.
Questions about RCD tripping
Does an RCD trip always mean the appliance I just switched on is faulty?
No. The timing is useful information, but the cause can involve the appliance, the installation or combined leakage from other equipment. Testing is needed to identify it.
Can I keep resetting the RCD until it stays on?
Do not repeatedly reset a device that keeps tripping. Stop using affected equipment and arrange electrical help to find the cause.
Contact us with the circuit label, timing and equipment affected. We will use that information to arrange the right investigation and explain the next steps.