Tripped protection
RCDs, breakers and main switches trip on faults, overloads or water getting in, taking out parts of the building.


Lost power at your shop, office, restaurant or rental property? Every hour offline costs you. We come out to Cardiff businesses day or night to restore power and keep you trading safely.
Commercial and landlord emergencies
When a business loses power it is not just the lights. Tills, card machines, refrigeration, IT, security and emergency lighting can all be affected. We understand the pressure that puts on you, and we work to restore what matters most first.
Our electricians work on single and three-phase supplies, distribution boards, sub-mains and emergency lighting. We find the fault, restore power to safe circuits as quickly as possible and keep disruption to customers, staff and tenants to a minimum, including out-of-hours visits.
Call us if you notice:
Common causes
We test properly to find the real cause, so the problem is fixed rather than patched.
RCDs, breakers and main switches trip on faults, overloads or water getting in, taking out parts of the building.
Losing one phase of a three-phase supply can stop motors, kitchen equipment and air conditioning, and needs fast diagnosis.
Heavily loaded boards and busbars can develop hot joints that fail without warning.
Faulty kitchen appliances, chillers, signage or machinery can trip whole circuits or boards.
Roof leaks, flooding and burst pipes can reach boards, trunking and fittings in commercial premises.
Problems on the incoming supply need the network operator. We confirm it and help you report it.
Before we arrive
What to do right now about commercial and business power loss, while a qualified electrician is on the way to you.
Look at neighbouring businesses and the street lights. If they are off too, call 105 to report it.
Look for tripped breakers or RCDs at the main and distribution boards, without forcing anything back on.
Check the emergency lighting has come on, keep exits clear and move customers and staff away from any hazards.
Keep fridge and freezer doors closed, and switch off sensitive equipment so it is protected when the power returns.
If water has reached the electrics, or a board smells hot, keep everyone away and do not reset anything.
Tell us what is off, any recent work and what is most critical, so we can prioritise it.

Warning signs
Overheated connections in busy commercial boards can fail suddenly and are a fire risk. Keep staff clear, do not reset anything and call us straight away.
Call 029 2209 0164How it works
Tell us what is affected and what is most critical. We agree the price first.
Critical circuits like refrigeration, tills, IT and emergency lighting come first.
The fault is found and repaired or isolated, and safe circuits restored quickly.
You get test results and a clear report for your records, insurer or landlord.
Call and get a Cardiff commercial electrician on the way.
Why Cardiff Emergency Electricians
We are a Cardiff team, not a national call centre. The person you speak to knows the city, the housing stock and how to get to you quickly.
Other emergency call-outs
Whatever the problem, one call gets a qualified Cardiff electrician on the way, day or night.
Trip switch keeps flicking off or will not reset? We find the faulty circuit or appliance and get your power back on safely.
Find out moreWhole house or a few circuits gone dead? We find out whether it is your installation or the network and get you back on.
Find out moreA hot, fishy or burning smell, or scorched fittings, can mean something is overheating. We trace it and make it safe.
Find out moreSparks, crackling or a socket that is hot to touch? We replace damaged fittings and check the circuit behind them.
Find out moreLights flickering, buzzing or a whole circuit out? We find loose connections and failed fittings before they become something worse.
Find out moreLeaks into lights, sockets or the fuse box are dangerous. We isolate the affected circuits, test them and make them safe.
Find out moreA shock from a fitting or appliance, or bare wires after DIY or damage, needs urgent attention. We make it safe and fix it properly.
Find out moreCall and describe what is happening. We will tell you what to do right now and get an electrician on the way.
029 2209 0164Areas we cover
From the city centre and Cardiff Bay out to Radyr, Creigiau and St Mellons, our electricians are based locally so help is never far away. Pick your area for local information. We also cover Penarth, Barry and the rest of the Vale of Glamorgan.
Check your areaFAQ
Common questions about commercial and business power loss. Still unsure? Call us and a qualified electrician will talk it through.
Yes. We work on single and three-phase supplies, distribution boards, sub-mains, commercial lighting and emergency lighting systems.
Yes. We attend 24/7, including early mornings, evenings, weekends and bank holidays, to keep disruption to your business to a minimum.
Yes. We attend tenant emergencies across Cardiff, keep you informed and provide paperwork for your records.
Yes. We test and repair emergency lighting so your premises stay safe for staff and customers to evacuate.
Yes. We provide details of the fault, the work carried out and test results, which you can pass to your insurer, landlord or head office.
Get in touch
For emergencies, always call. For quotes and planned work, send us a message and we will ring you back.
24/7 emergency line 029 2209 0164