Breaker and RCD replacement
Worn breakers, a dead RCD, protection sized for the wrong cable — replaced so the protection actually protects.
From 2.500 RSD · per unit, excluding materials
Protection in the consumer unit does one job: cut the supply before damage happens. When it is worn out or wrongly chosen it does not do that job — and it still looks exactly the same.
What we replace
Breakers that are worn, that fail to trip on a short circuit, or that are wrongly sized for the cable. The last one is more common than it should be: somebody "solved" nuisance tripping by fitting a 25 A device on a circuit designed for 16 A.
RCDs that fail the test button, that trip for no reason because the mechanism has aged, or that simply are not there.
Surge protection where it earns its place — in houses and top-floor flats, and anywhere lightning has already caused damage.
How we choose
A breaker is chosen from the cross-section of the cable it protects, not from what was there before. So before replacing anything we check what is actually buried in the wall. If the circuit is 1.5 mm² aluminium, there is no case for a 16 A device on it regardless of what has been sitting there.
The RCD is chosen by application: 30 mA for personal protection, type A wherever there is electronics and inverters, selective where two-stage protection is being built.
After fitting
We measure the earth fault loop — that shows whether the protection will actually disconnect fast enough — and test the RCD with both the button and an instrument. The results get written down. Without that measurement the installation is an assumption, not a job.
Not sure what is in your board?
If you do not know what is in your board, photograph it with the cover on and send it over. The picture tells us the number of circuits, the type of protection, and whether there is room to add anything.
Common questions
My breaker keeps tripping. Can I fit a bigger one?
No. A breaker does not protect the appliance, it protects the cable in the wall, and that cable does not get thicker because you fitted a larger breaker. A bigger breaker only moves the moment the cable overheats, and moves it the wrong way. When a breaker trips, you look for the cause.
How do I know my RCD works?
It has a T button for exactly that. Press it once a month — the device must trip. If it does not, it is faulty and protects nobody, even though it still looks like protection.
I have no RCD. Do I need one?
Yes. An RCD is the only protection that responds to current passing through a person; an ordinary breaker does not respond to that at all. In a flat without one, fitting an RCD is the single highest-value intervention on the installation.
How long does it take?
Replacing one breaker or RCD is half an hour including the checks. Adding an RCD where there was none needs room in the board and circuits split up — that is usually half a day.