UK plug load

A 3 kW heater leaves almost no spare room on 13 amps.

Use the real input rating, voltage, other same-time load and lead condition. Warm plugs, damaged sockets or coiled reels mean stop — not “try a different adaptor”.

Maths first, safety boundary always.

This is a load and red-flag check only. It does not inspect the socket, cable, fuse carrier or circuit behind the wall.

Check how tight a 3 kW heater is on a 13 amp plug.

A 3 kW heater can be right on the edge before other equipment, run time, lead rating or a warm plug is considered. Use this as a planning check, not as permission to run damaged kit.

Heater input watts Voltage Plug / supply rating Other same-time watts Run time Lead/reel rating if used

Extension lead or cable reel is involved Plug, socket or lead is warm, hot, melted or damaged Cable reel is partly coiled