I’m an Electrician – These Are the Most Common (and Dangerous) Electrical Mistakes I See in Homes

Whether it’s overloaded sockets or DIY fixes gone wrong, small mistakes with your home’s electrics can lead to serious safety risks. James Harrison, Director at Fusion Electrical, one of the North West’s leading electrician firms, shares the most common – and often dangerous – electrical errors he and his team see in UK homes every day.

Mistake 1: Overloading Extension Leads

“One of the most frequent issues we see is overloaded extension leads, especially in kitchens and bedrooms,” says Harrison. “People plug in multiple high-power appliances like kettles, toasters, and microwaves without realising these all draw a lot of current.”

“Just because there are four plug sockets doesn’t mean it’s safe to use them all at once,” he warns. “This can easily lead to overheating or even fires.”

Mistake 2: DIY Electrical Work Without Proper Knowledge

“Trying to fix or install electrical components yourself without the right training is incredibly risky,” Harrison says. “We often get called out to sort dangerous wiring jobs or fuse boards tampered with by someone trying to save money.”

“If you don’t know what you’re doing, you could cause a short circuit, electrocution, or create a fire hazard. It’s simply not worth the risk.”

Mistake #3: Not Testing or Replacing RCDs

“Residual Current Devices (RCDs) are designed to trip and cut power if they detect a fault – but they need to be tested regularly,” Harrison explains. “We see a lot of properties where the RCD hasn’t been tested in years, or it’s faulty and no one realises.”

“Every home should have working RCD protection – it could literally save your life in the event of an electrical fault.”

Mistake #4: Covering Cables and Sockets

“People often hide cables behind furniture, under rugs, or even paint over sockets,” Harrison says. “While it might look tidy, it can trap heat, wear down insulation, and increase the risk of faults or fires.”

“Sockets and cables need room to breathe – and they need to be visible so you can spot signs of wear or overheating early.”

Mistake #5: Ignoring the Warning Signs

From buzzing switches to flickering lights or the infamous fishy smell from melting plastic, electrical issues often come with warning signs. The real danger is ignoring them.

“People think, ‘It’s probably nothing,’ and carry on using the faulty socket or switch,” Harrison warns. “But those signs usually mean something is overheating or arcing – and that’s a serious fire risk.”

How to Stay Safe

“If you’re unsure about something electrical in your home, always get it checked by a professional,” says Harrison. “It’s much cheaper and safer in the long run.”

Fusion Electrical recommends getting an Electrical Installation Condition Report (EICR) every five years and calling an electrician immediately if you notice anything unusual – smells, sounds, flickering, or tripping circuits.

“Your home’s electrics might look fine on the surface, but behind the scenes, problems can build up. We see it all the time,” he adds. “Regular checks and small fixes can prevent major issues – or even save lives.”