Electrical Fire Safety Guide UK¶

Preventing electrical fires in UK homes - common causes, wiring safety, fuse boxes, and appliance checks to reduce fire risk.

Common Causes of Electrical Fires in UK Homes¶

Electrical fires account for around 20,000 fires in UK homes each year, according to Home Office statistics. The leading causes are faulty wiring, overloaded sockets, damaged appliance cables and ageing fuse boxes (consumer units). UK homes built before 1970 often have outdated wiring with rubber or lead-sheathed cables that degrade over time. Signs of dangerous wiring include flickering lights, burnt-smelling sockets, hot plugs, and discoloured switch plates. Never overload sockets using multi-way adapters - the UK standard 13A socket is rated for 3,000W maximum. Extension leads must be fully uncoiled to prevent heat build-up. Use a PAT testing plug-in checker at home (£15-£30 from Screwfix or Toolstation) to spot wiring faults in appliances.

Fuse Box, RCD Protection and Appliance Safety¶

Modern consumer units with RCBOs (residual current breakers with overcurrent protection) replace old fuse boxes and provide lifesaving protection. Any consumer unit installed or replaced since 2015 must meet BS 7671 (18th Edition Wiring Regulations). An RCD protected consumer unit costs £80-£200 supplied, £300-£600 installed by a Part P electrician. Test RCDs quarterly by pressing the 'T' button. For appliances, check cables for fraying, avoid trailing cables under rugs, and never leave washing machines or tumble dryers running overnight. Tumble dryer fires cause 3,000 incidents annually - clean the lint filter after every use. Register appliances for safety recalls via the Electrical Safety First website. Use an electrical safety inspection (EICR) every 10 years for owner-occupied homes, every 5 years for rented.

Specifications and Comparison¶

Fire Cause	Prevention	Check Frequency	Professional Cost
Overloaded sockets	Use extension leads with surge protection	Monthly visual check	Free
Old wiring	Rewire with BS 7671 compliant system	EICR every 10 years	£300-£600
Faulty appliances	PAT test portable checker	Plug in check every 6 months	£15-£30
Tumble dryers	Clean lint filter, don't run overnight	Every use	Free

FAQ¶

How do I know if my home's wiring is unsafe?: Look for flickering lights, hot or discoloured sockets, a smell of burning plastic, and a fusebox that trips frequently. Hire a Part P electrician for an EICR.
Are extension leads safe for UK homes?: Extension leads are safe if used correctly. Never daisy-chain multiple extensions, fully uncoil cable reels, and avoid exceeding the 13A/3,000W rating.
What is an EICR and how often is it needed?: An Electrical Installation Condition Report checks the safety of your fixed wiring. Needed every 10 years for owner-occupied homes, every 5 years for rentals. For more information see our Fire Extinguisher Guide for UK Homes.

Last updated: 2026-05-31.

External Resources¶

For further information consult authority guidelines at the Which?.