I think you're thinking about it on the kettle side, and I was thinking on the breaker side.
I think the kettle side would not care. It may be a ground fault in UK wires, but the kettle has no reason to detect it, and nothing sensitive enough inside to care. If I'm wrong, I'd expect to know shortly after starting the very first use. :)
> Most UK kettles are not 3000W, and most of the ones that are, are junk. Y
They may not be 3 kW, but even the most basic of them are 2200W [0], and 3000W ones are readily available are not much more expensive [1]. They're also not really junk - they're a lump of plastic, a hot plate and a thermistor - the difference between a £8 one and a £80 one is almost all aesthetics.
I watched the video already before this HN thread, being a Technology Connections subscriber, but I genuinely forgot or missed that it discussed that aspect. I'm not surprised, though.
I think the kettle side would not care. It may be a ground fault in UK wires, but the kettle has no reason to detect it, and nothing sensitive enough inside to care. If I'm wrong, I'd expect to know shortly after starting the very first use. :)