i bought one to try and teach myself to stick weld. the results weren't pretty but it seemed to work much better when my son used it so cannot blame the clarke
we used ours on a 13amp socket (tight fit for the cable) with 3.2mm rods but my son had a found it did trip his board sometimes when he was welding thicker stuff
It should, provided were talking about the massive transformer based unit, be on a minimum of a 32a plug and breaker if the data plate is anything to go by!!