I'm in discussions with a representative of The Ridge Motorsports Park about installing a temporary 14-50 receptacle. The recommendation from this representative was to bring 20' of length of wire and, of course, the receptacle itself. I'd prefer to error on the side of overly cautious on wire gauge, etc. unless it's 5x the cost. I'll likely just ship direct to them via Amazon, or pick up the parts myself from Home Depot. Recommendations? Any other warnings, advice, or guidance that I should be aware of or that I should pass along to them? Thanks.