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uk Home & property emergencies buzzing fuse box • crackling consumer unit • fusebox making noise • consumer unit arcing • electrical panel buzzing • sizzling from fuse box • humming consumer unit • sparking in fuse box • breaker tripping with buzzing • burning smell by fuse box • lights flickering and buzzing • electrics crackling sound • suspected electrical arcing • main switch shut off • electrical fire risk at home • loose connection in consumer unit • fuse box overheating • noise from electrical cupboard

What to do if…
you hear buzzing or crackling from your electrical panel or fuse box

Short answer

Treat buzzing or crackling from a consumer unit/fuse box as a possible electrical fault (arcing/overheating). If it’s safe, switch off the electricity at the main switch and call a qualified, registered electrician urgently; if there’s smoke, fire, or a strong burning smell, get everyone out and call 999.

Do not do these things

  • Do not open the fuse box/consumer unit cover or poke around inside.
  • Do not keep flipping breakers/fuses back on “to see if it stops”.
  • Do not touch the box, switches, or nearby metal surfaces if they feel hot or you see scorching, melting, smoke, or sparks.
  • Do not use water to put out an electrical fire.
  • Do not ignore it because “everything still works” — noise can be a warning sign.

What to do now

  1. Pause and do a fast safety check (10 seconds): Is there smoke, visible sparking, flames, heat, or a strong burning/plastic smell?
  2. If any of those danger signs are present:
    • Get everyone out of the property, closing doors behind you if you can.
    • Call 999 and say you suspect an electrical fire/fault.
    • Don’t re-enter until you’re told it’s safe.
  3. If there’s no smoke/fire and you can reach it safely:
    • Go to the consumer unit/fuse box and switch OFF the main switch (this cuts power to the home).
    • If you have more than one main switch (common with some setups), switch off all main switches you can identify.
  4. Move away and keep the area clear: Don’t stand in front of the unit longer than needed. Keep children/pets away.
  5. Call a qualified, registered electrician (urgent): Tell them you heard buzzing/crackling from the consumer unit and that you’ve switched off the main switch (or that you couldn’t, if that’s the case).
  6. If you think the problem might be with the supply equipment or anything outside (service head, meter box, cables, street equipment) or you see damage outside:
    • Do not touch it. Step back.
    • In Great Britain, call 105 to reach your local electricity network operator and report it as a safety issue. In Northern Ireland, call 03457 643 643 (NIE Networks).
    • If it looks immediately dangerous (sparks/fire), call 999.
  7. Leave power OFF until it’s checked: Don’t restore power until a professional says it’s safe. If you later restore power on professional advice, do it calmly and stop immediately if the noise returns.

What can wait

  • You do not need to diagnose the cause (loose connection, failed breaker/RCD, overloaded circuit, etc.) right now.
  • You do not need to decide about rewiring or replacing the consumer unit today.
  • You do not need to check every socket or appliance immediately — focus on making the situation safe and getting professional help.

Important reassurance

This kind of noise can happen with faults that are fixable, and acting early is exactly what prevents bigger problems. Switching off and calling for help is a sensible, proportionate response — you’re not overreacting.

Scope note

These are first steps to stabilise the situation and avoid harm. A qualified electrician (or the network operator, if it’s supply-side) will need to inspect and confirm what’s safe before anything is turned back on.

Important note

This is general safety information, not professional electrical advice. If you feel unsafe at any point, prioritise getting out and calling emergency services.

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