Besides putting too many devices on a single wall socket, that draw too much power, what is supposed to happen?
Like say I chain ten dividers and put a single vacuum cleaner at the end. Is that more dangerous than plugging it directly into the wall?
Besides putting too many devices on a single wall socket, that draw too much power, what is supposed to happen?
Like say I chain ten dividers and put a single vacuum cleaner at the end. Is that more dangerous than plugging it directly into the wall?
Short answer, it’s actually not.
The actual danger is overloading a socket. This is significantly easier with a chain of extensions.
Resistance on the individual plugs shouldn’t be an actual issue. The only way it might come into play is if you are using a switch mode power supply at the end. This would adjust its current draw to account the reduced voltage. This would increase the current draw at the plug.
E.g. a PSU trying to draw 1000W. At 120V this would be 8.33A. If you drop 30V, then the supply would draw 11.1A. The intermediate plugs would dissipate 333W. You would be drawing 1333W from the wall.
In countries with low AC voltages, and a lack of fused plugs, this could overload a socket and cause a fire.
It’s also worth noting that long extensions have the same issue though it’s less. They also have a far lower rating when coiled than when uncoiled. E.g. I have a 13A extension that can only provide 4A when fully cooled.