In the UK we use both 240V and 110V (nominal). Our supply is at 240V. Our appliances are pretty safe out of the box - several standards.
We also utilise 110V devices but that requires a step down transformer. I have one. My big hammer drill runs on 110V.
Fire is not caused by electric current. Fire requires a source of ignition and that's not EMF.
More details please.
> Fire is not caused by electric current. Fire requires a source of ignition and that's not EMF.
All electrical cable/wire is rated for so many amps and a certain temperature: if you mismatch the breaker and the cable ratings then you could allow too much current through, and because of I^2 resistance, a fire could happen.
Do a search for "Ampacity Chart".
If you're claiming the UK uses 110V, then you must also include that it uses 415V.
Both of these are only used outside domestic settings. (Until recently, 415V for a car charger is becoming more common)
110V is regularly used via transformers, generally for safety - 110V doesn't kick you as much as 240V. Perhaps I didn't emphasise that 110V is not grid delivered here.
I have a 110V transformer and a 110V rated SDS hammer drill. The idea is that if I manage to hit an electrical cable then I will probably not die, with luck.
We also have three phase which I think is normal in the US, for example and is why ethernet over power line is a bit fraught.