I grew up in the UK. Electric kettles are more common there than they are in the US because: - People drink at all times of day, and - Household power sockets can deliver a lot of power (a typical $30 kettle in the UK is rated at 3kW vs. US where 1.8kW is normal even for more expensive ones) Anyway, before kettles became cordless[0], they all had detachable leads. And there was a standard. So you could use any 'kettl…
I've always called them kettle leads, I don't even know what the real name for them is. Everyone I've known in IT calls them that. That's basically their official name in the UK :p