[TheForge] extension chord

[Mike Shpeley]

Hi;
I need to make up a 20 ft extension chord for my 225 amp buzz box in a hurry for a job and am wondering if I can get away with using # 12 wire without stressing it out. Live on an island and that is the biggest size that is rubber coated  that the hardware store has in stock. I could get the plastic coated #10 and put a steel coiled shield around it but it would seem to be really inconvenient trying to coil it up. Any suggestions. Thanks in advance.
Mike S