Electrical & Lighting · 6 min read · Beginner

How to Reset a Tripped Breaker Safely

Identify a tripped breaker or RCD, reduce the connected load and attempt one safe reset without treating repeated tripping as a nuisance to bypass.

Key points & steps

If there is burning, smoke, scorching, unusual heat, buzzing, water ingress or an obvious electrical fault, do not attempt a reset; isolate the supply if safe and seek competent electrical help.
Open the consumer-unit cover only as intended for normal user access and identify the breaker or RCD whose handle is in the off or tripped position compared with the others.
Switch off or unplug appliances on the affected circuit where practical before resetting, especially anything that was operating when the trip occurred.
For a breaker that requires it, move the handle fully to the off position first and then firmly back to on. Do not hold it in place or repeatedly force it.
Restore appliances one at a time and watch for the breaker tripping again, which may help identify a faulty appliance or overloaded circuit.
If an RCD has tripped, remember that it may protect several circuits; isolate likely appliances before attempting one reset.
If the breaker or RCD trips again immediately, will not reset, feels damaged or repeatedly trips in normal use, leave it off and arrange competent electrical investigation.
Never remove the consumer-unit cover or work on exposed internal conductors as part of a simple reset.

A breaker is a safety device; repeated tripping is evidence to investigate, not something to defeat.
Do not assume a circuit is safe merely because a breaker stays on after resetting.
If you cannot confidently identify the affected circuit or there are signs of damage, use an electrician.