You could also take a gravity reading to confirm the fermentation is done, but you will loose some liquid... along with the yeast in suspension. Unless you use a refractometer.
When I got home tonight I measured my extension cord. It is exactly 53 feet long (not over 60' finally - sorry). I run a 3500 watt RIMS, a 2500 watt element and a pump. All together they pull a little less than 27 amps. I always thought I was complying with the code. I get between 237 and 242...
Eamster,
I am not an expert.
This being said, I have a 10/4 extension cord of more than 60 feet that runs from a 30 amp Gfci breaker box to the control panel of my brewery. Never had any problem with it. It supplies 240v/30A to my RIMS based system.
You should be able to find one for cheap on kijjiji.ca:
http://www.kijiji.ca/v-hot-tub-pool/ottawa/50-amp-spa-hot-tub-panel-new/1120381558?enableSearchNavigationFlag=true