haha dodgy bastard!!
nah its all good, 10 amp wires are rated more then what they can take 12 or 13?, the C/B trips it but overload takes like 30 mins before it trips, so if you constantly welded for 30 mins itd probably trip haha. it could probs run a welder no issues if you didnt have other shit on the circuit too, like if you ran a stove/oven and other shit itd probs trip quicker.