Asger Risom
“If you connect several small appliances to a power strip, you have a very serious problem.” An electrician explains the dangerous thermal physics behind overloading your kitchen circuits.
“If you connect several small appliances to a power strip, you have a very serious problem.”
That is the blunt, zero-compromise warning from professional electrician Fran Carbonell. And if you look closely at the average modern countertop, it is easy to see exactly what he is talking about.
Over the last decade, we have fundamentally transformed how we cook, filling our kitchens with high-wattage hardware like air fryers, multi-blenders, and espresso machines. But the actual electrical infrastructure of our homes hasn’t changed. The vast majority of kitchens only have a couple of usable wall sockets.
To bridge that gap, millions of people resort to a cheap, seemingly harmless workaround: buying a plastic extension cord and plugging everything in at once. According to a breakdown by elEconomista, it is one of the most common—and most dangerous—mistakes a homeowner can make.
The thermal limit of cheap plastic
The core issue comes down to raw electrical draw and heat. A standard power strip is engineered to safely distribute low-amperage electricity to home office or entertainment setups—routers, televisions, and phone chargers. Kitchen appliances operate under entirely different physical demands. Devices designed to generate rapid heat or mechanical force, such as a toaster oven or a Thermomix, require massive, sustained bursts of electrical current.
When you daisy-chain multiple heating appliances into a single plastic extension block, the hardware simply cannot handle the load. To demonstrate the physics at play, Carbonell tested a standard power strip with four small kitchen appliances plugged in.
While the machines were idle, the strip hovered at a perfectly safe 32 degrees Celsius. But the moment those appliances were turned on simultaneously, the internal temperature of the strip spiked to 74 degrees Celsius almost instantly.
That sudden, intense heat actively degrades the plastic housing inside the power strip. Once the internal plastic casing melts, the wiring is exposed, creating the exact conditions required for an electrical arc, a short circuit, and ultimately a severe structural fire.
Upgrade the wall, not the cord
A power strip is not a substitute for a permanent electrical installation. You cannot patch a poorly designed kitchen with a ten-dollar plastic extension block.
If your kitchen lacks the necessary sockets to support your daily cooking habits, Carbonell’s professional recommendation is to adapt the room itself. The only secure solution is to replace the extension cord entirely and install a permanent, four-socket wall base that is properly rated for high-wattage hardware.
