Same-day attendance

Fuse box keeps tripping — Cardiff diagnostic visit

The certificate is emailed and kept on file, so replacing a lost copy is easy. The regulations change; the approach of measuring before advising does not.

There is no single price for fuse box keeps tripping in Cardiff, and anyone quoting one before looking is guessing. If your fuse box keeps tripping in Cardiff, the honest answer is that you don't need a rewire and you probably don't need a new consumer unit — you need a proper diagnosis. Most enquiries reaching us from Cardiff arrive after something has already been tried. Starting from measurements rather than the previous attempt saves time. For Victorian and Edwardian terraces across Cathays and Roath that detail matters more than it does elsewhere.

Board upgrades quoted separately if needed.. Where previous work has no certification behind it, we test it rather than take it on trust. We would explain the same thing on site, just with the board open. This page is for anyone in Cardiff trying to work out whether fuse box keeps tripping is their next job or next year's.

Likely causes

A faulty appliance dumping current to earth — kettles, washing machines and immersion heaters are the usual suspects.
A shared RCD tripping because two circuits together exceed the 30mA leakage threshold, even when each is fine on its own.
Water ingress into an outside socket, garden light or shed circuit after heavy rain.
A worn RCD at end-of-life — 15+ year-old devices lose sensitivity and false-trip.

Safe checks you can do first

Unplug everything on the tripping circuit, reset, then plug items back in one at a time.
Check whether the trip happens at the same time each day (immersion timer, storage heater).
Look for scorch marks, warmth or a burnt smell around sockets before touching anything.

When to stop and call

If the RCD won't reset with everything unplugged, or you smell burning, isolate the main switch and call.

How we fix it

We insulation-resistance test each circuit under the RCD, isolate the faulty one, then trace the fault to the exact accessory or cable. Most faults are found and made safe on the first visit; a full RCBO board upgrade is quoted only if the whole board is at end-of-life.

Typical price: £95–£180 for diagnosis + first-visit fix on a single fault. Board upgrades quoted separately if needed.

FAQs — fuse box keeps tripping in Cardiff

Is a tripping RCD dangerous?+

The trip itself is the safety device doing its job. What's dangerous is repeatedly resetting a trip without finding the cause — that's how socket fires start.

How long does diagnosis take?+

Most single-fault diagnoses are done inside an hour. Intermittent faults that only appear at certain times can take a return visit.

Can I keep resetting it until you arrive?+

No. If it won't hold, leave it off and turn on the circuits you actually need one at a time. Don't force the RCD closed.

Cardiff context

The short answer for fuse box keeps tripping in Cardiff: get it tested by someone who explains what the reading actually means. Owners in Cardiff often ask whether this is a repair or the start of something bigger. Testing answers that; opinion does not. That is the honest version, rather than the version that sells more work.

Send the details — Fuse box keeps tripping in Cardiff

You get one price, one electrician and one point of contact from first call to certificate. We cover Cardiff and the CF10–CF24 postcodes, including Pontypridd, for fuse box keeps tripping. If a survey is the sensible first step, we will say so and price it separately so you are not paying twice.

Call 07949 398 752 Request a quote

In summary

Fuse box keeps tripping: we survey, we test, we quote. In that order, every time. Older property, altered property and previously let property all get the same testing discipline. Access, timing and tenants are all workable — say what you need when you book.