[OJFord]

Yes, and a kettle is a likely candidate for the cause of a trip, but (in normal operation) the vast majority aren't near that, a little over half.

AmazonBasics kettle (first result for searching kettle) for example is rated 1.5kW.

I'm just sceptical that all American kettles can suck, and mains voltage be the cause. If that were the only reason, and otherwise you'd all love them, you'd have a 'kettle socket' on higher amperage, as for ovens (here too, 32A).