Specifically to being careful: put a GFCI upstream of the kettle outlet. Which should be there anyway because it's a kitchen, but even more important with a phase-to-phase setup.

I live in Japan where we have a paltry 100V. In our apartment it's made by for by having lots of (20A) circuits - 3 for the (small) kitchen alone [which uses gas for the stove anyway]. Total of 14 breakers for a small 3 bedroom + living + kitchen apartment.

In 3 years we've only tripped a breaker once - running a microwave, toaster oven and dishwasher all off the same outlet at once.

You could imagine it driving you nuts, in my experience trips are rare (once every few years?) unless you love space heaters. Electric ranges (hobs?) run on their own dedicated 240V circuit. As a tradeoff, the plugs are small and convenient; I can fit a phone charger in my pocket, plus the phone and cable—true in Europe, but not the UK. I can also get a power strip with 8 outlets and it won’t take up much space.

A couple days ago I tripped a circuit breaker for the first time in many years. It turns out that the refrigerator shares a circuit with the rest of the kitchen, so when I ran a rice cooker and deep fryer off the same circuit, when the compressor turned on it tripped.

Note that many businesses, and some circuits in residential homes, are wired for 20 amps. The sockets that definitely support 20 amps have an additional slot for 20 amp connectors. See: https://upload.wikimedia.org/wikipedia/commons/thumb/4/42/El...

Older houses have interesting wiring. I've even seen a 5A circuit (once) in a really old place, varnished cotton clad copper wire and other interesting stuff.

Also (in NL), a fire that had started in a junction box that somehow died out without becoming more serious. That was a pretty scary find in a house that I had just bought.