Turn off your electricity at the fuse box
Essential safety knowledge
5 mins · Beginner · Essential emergency skill
Last updated: March 2025
Before you start
Every adult in the home should know where the consumer unit (fuse box) is and how to turn off the power. In an electrical emergency, seconds matter.
Your consumer unit is usually under the stairs, in a hallway cupboard, or in the kitchen. It is a grey or white box with rows of switches inside.
Tools needed
- ✓Nothing needed — just your consumer unit
Find your consumer unit
Look under the stairs, in the hallway, kitchen, or garage. It is a white or grey box, usually mounted at head height, with a hinged cover. Open the cover to see the switches inside.
Where beginners go wrong
Not finding the consumer unit until there is already an emergency — find it now and tell everyone in the house.
Assuming turning off a light switch cuts the power to the wiring — it does not. Only the consumer unit breaker does.
Not confirming the power is off before working on electrics — always test with a lamp or socket tester first.
Stop and call a electrician if...
The main switch is already off but the property still has power — there may be a second supply
There is burning, sparking, or a burning smell from the consumer unit
The cover is damaged or the wiring inside looks burnt or scorched
Cost breakdown
What you just learned
You now know how to isolate power to the whole home or individual circuits in seconds. This is the most important electrical skill a homeowner or renter can have.
What this unlocks
With confidence at the consumer unit, you can now safely replace light switches, change sockets, and do any electrical work — knowing you can fully isolate the circuit first.
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⚠️ Watch out if you rent
Ask your landlord or letting agent where the consumer unit is when you move in. This is basic safety information they should provide. If the unit is locked in a communal area, ask for a key or access instructions.