Electrician in Murcia

Spain's current low-voltage regulations (the REBT) date from 2002, and everything built before was wired to far less demanding standards. In flats from the 1960s to the 1990s we routinely find boards with a single diferencial (RCD) for the whole home — or none at all — cable too thin for modern loads, and entire rooms without an earth connection. The installation may 'work' for years, but it works without the protections now considered the bare minimum, and any fault costs you dearly.

The toma de tierra (earth connection) is what sends a current leak into the ground instead of through you. In many older Murcia homes only the kitchen and bathroom have one — or it is missing entirely. The telltale signs: old two-pin sockets without side contacts, or a faint tingle when you touch the washing machine or the sink. Adding earth to the circuits that lack it is one of the most cost-effective safety upgrades a home can get.

These homes were wired for how people lived thirty or forty years ago. Today they run air conditioning in several rooms, an induction hob, an oven, a tumble dryer and, increasingly, an EV charge point. If the installation was never extended, all of that hangs off two or three circuits designed for far less: constant tripping, warm cables and worn-out fittings. The fix is not bigger breakers — it is splitting the load across properly sized circuits.

During the 1960s and 70s, some buildings of the era were wired with aluminium conductor instead of copper. Aluminium expands and loosens at connection points over time, which can create hot spots inside junction boxes and fittings. If your building dates from that period and the wiring has never been renewed, an inspection is worthwhile: it does not always mean an immediate rewire, but you should know what is actually behind the wall.

On ground floors, in basements, patios and terraces we see plenty of RCDs that trip when it rains or during humid spells. The usual culprits are outdoor junction boxes, garden sockets or buried cable runs absorbing moisture and leaking current to earth. It is a genuine warning, not the board being temperamental: we locate it by isolating circuits with test instruments and fix it with proper sealing and outdoor-rated protection.

Rewiring a home means replacing the cabling, junction boxes and fittings, and installing a new board with modern protections. Wherever possible we pull the new cable through the existing corrugated conduit — so there is far less chasing and breaking than people expect — and we size every circuit for how the home is really used. In an average flat it is a matter of days, and it is the ideal moment if you are planning a full renovation.

If the budget will not stretch to everything at once, a staged rewire done intelligently works well: first the board and its protections — the single biggest safety gain in one go — plus the kitchen and bathroom circuits, which work hardest. The rest of the home follows zone by zone. The key is planning the whole sequence from the start, with cable sizes and conduit already laid out for the final installation, so you never pay twice for the same work.

A modern board splits the home into several circuits, each with its own magnetotérmico (breaker), and protects the whole with one or more RCDs. Compared with the old 'plomos' fuse setup many Spanish flats still have, it is a leap in both safety and convenience: when something fails, only the affected circuit trips rather than the whole house, and finding the fault is far quicker. In most homes it is a one-day job, and it is the foundation for every later improvement.

We fit more and more surge protectors — against transient spikes and sustained overvoltage — which save appliances and electronics when a storm or grid switching sends the voltage soaring. And while the installation is open, it pays to prepare for what is coming: provision for an EV charge point, a line for a heat pump, basic home automation. Leaving the conduit and the board space ready costs very little during the work and considerably more afterwards.

If the supply cuts out when you switch on several appliances at once, you may need more potencia contratada — the maximum power your electricity contract allows. The request goes through your retailer, but the distributor can require the installation to be in good condition and, in some cases, a current boletín (CIE). We check first whether your installation can take the increase: sometimes the real problem is a badly balanced circuit, solvable without paying for more power every month.

The diferencial trips when it detects current escaping where it should not — to earth or, potentially, through a person. The cause can be damp, a failing appliance or deteriorated insulation. One isolated trip after a storm may be nothing; repeated trips are a serious warning. Note down when it happens and which appliances were running: that information dramatically shortens the diagnosis once the electrician arrives.

A smell of burning plastic, or a socket or switch that is warm to the touch, points to a connection making poor contact and generating heat. Unplug whatever is connected to it, switch off that circuit's breaker if you know which one it is — or the main switch if you do not — and do not use the point again until it has been checked. It is one of the few electrical faults that can genuinely end much worse if ignored.

If the RCD or a breaker trips and trips again the moment you reset it, insist exactly once. It is cutting out for a reason, and every reset hits the installation — and the fault — with another surge of current. Unplug the appliances on the affected circuit and try once more; if it trips again, leave that circuit off and call. Resetting on a loop is the fastest way to turn a small fault into an expensive one.

Changing a bulb, resetting the board once or unplugging a suspect appliance is all within reach. Opening up sockets, joining cables or working inside the board is not: even with the main switch off, live current from the grid still enters the board up to that switch. Never work on live parts, and never touch the board with wet hands or standing on a wet floor. Electricity does not forgive 'almost right'.

In Spain, work on the fixed installation — adding circuits, replacing the board, modifying the derivación individual (the supply line from the building's meters) or issuing certificates — must be done by installation companies registered with the regional industry authority. It is not just red tape: it is what gives the work legal standing with your utility and your insurer. If someone offers to do it 'without paperwork', cheap can turn very expensive.