Consumer unit replacement and rewiring in Sant Joan d'Alacant

Sant Joan d'Alacant is the municipality inland of the beach, not the Playa de San Juan district of Alicante city.

Its housing is mostly detached, and that puts a long buried cable between the meter and the board.

Why the supply itself is often the bottleneck here

In a flat the meter is a few metres from the consumer unit. On a detached plot it is frequently at the boundary wall or at the road, and the individual supply cable runs buried across the garden to the house. That cable is entirely your responsibility and it is the part of the installation nobody ever looks at.

It matters because voltage drop accumulates over distance. A cable sized correctly for a short run is not sized correctly for the same load forty metres away, and where a house has grown — air conditioning added, an induction hob, a pool pump, now a car charger — the original supply is being asked for far more than it was laid for.

The symptom is distinctive and it is not a tripped breaker. Lights dim when the pump or the oven starts, equipment runs warm, motors start sluggishly, and the whole property behaves slightly worse under load without anything actually failing. Owners tend to read that as ageing. It is usually a measurement.

This is why we measure at the meter and at the board under real load before quoting a rewire here. Replacing every circuit inside the house while leaving an undersized supply in place fixes the visible things and leaves the actual constraint untouched — and it is an expensive way to not solve the problem.