A colleague has just moved into a flat. He bought a new cooker, they've refused to wire it up because it requires a 40amp socket and he only has a 20amp socket. Now, am I right in thinking replacing the 20amp for a 40amp may require re-wiring? In which case, is he better off getting a cooker that can cope with 20amp? And how do you know what the cooker can and can't cope with when you're buying? If you look on comet/currys website, nothing about socket required. It's a gas hob/electric oven cooker, so it's not as if he'd have massive electricity draw running the hob and oven simultaneously.