I happen to love the outlet boxes made by Woodhead - http://www.woodhead.com/products/electrical/portablepower/
They are very pricey, but need little maintenance down the road. FWIW,
Thanks for that. I wonder if they make those in black. Yellow doesn't cut it for the corporate work I do.
Edit: They come in black, also.
Also, do you really need to be 20 amp capable?
Problem is if you put 10 250 watt movers on the string the load would be at 2500 watts and you would need the full 12/3
Remember the breaker is to protect the cable, so if you can over load the cable before the breaker trips, you run the danger of having problems with an underrated ampacity For the price difference IMO 12/3 Soow is worth the price
I can't imagine doing that. At roughly 4 amps or more per fixture, that would be more power than the typical 15 amp circuit could handle. At most I run 2 moving lights on a circuit. Mostly, I'm working in hotel ballrooms and we're not allowed to use the panel without paying a hefty premium for the house electrician to open the electrical panel. And if the client's budget can't handle it we have to work around it. We have to design the rig based on available wall power. A pain, but a reality. So having 12 gauge wire isn't worth the expense.