Why does a plug get overloaded and how can it lead to fires?
This is the question behind the investigation into the La Vila Joiosa incident, where three people died. Beyond the specifics of that case, authorities and industry associations point to a simple mechanism: an overload happens when many devices are plugged into a single outlet or strip, causing heat buildup and a spark. If the residual protective device, the breaker, does not trip, the circuit keeps feeding electricity and the risk grows. This is the core idea the electrical trades often reference when explaining what can go wrong in a home.
In practical terms, typical household outlets are rated around 16 amperes. The problem arises when people rely on power strips and extension cords to connect multiple devices. A television or a radio might be fine, but serious risks appear when higher-energy appliances are added, such as a heater. The mix of heavy loads with a poorly maintained installation increases danger. If protections like the breaker or residual-current device are worn or not functioning, they may fail to interrupt the current during an overload, turning a small fault into a dangerous event.
To prevent this, it is advised to avoid plugging many devices into a single outlet and to be cautious with high-consumption items. Appliances like stoves, air conditioners, refrigeration units, ovens, and washing machines should not be run from the same shared outlet or power strip. It is also important to use high-quality power strips and extension cords, avoiding cheaper options that do not meet safety standards. Regular checks of the differential protection mechanism, commonly called the breaker, are essential. Testing the breaker occasionally helps ensure it will trip when needed, especially if a unit has sat unused for long periods, which could reduce its responsiveness in a real overload scenario.
Another issue involves electrical products that come from outside the European Union without CE certification, which signals compliance with European safety rules. With the rise of online shopping from factories abroad, consumers risk connecting devices that lack essential warranties and safety testing. Batteries, power strips, mobile devices, and tablets are among the items that can be affected. European manufacturers tend to subject their products to testing and inspections to verify safety and performance, while uncertified imports may not meet the same standards. It remains important to ensure that any device connected to a plug complies with applicable safety regulations and carries the appropriate certification, regardless of where it was made.
Additional concerns apply to how devices are charged. For example, leaving mobile phones plugged in overnight can pose a risk of overheating while people are asleep, underscoring why mindful charging habits are part of home electrical safety. Periodic attention to charging practices and the status of charging equipment can help reduce the chance of problems developing during rest or extended use.