There are 20A rated power strips with 12/3 wire. I'm not clear on whether you're anticipating continuous loads of 30+ amps or that's just your start up current? What size breaker is in your service panel where this will be plugged in? I don't have a shelix head but I can run my 735 planer and dust collector at the same time on a 20A circuit with no issues. It seems unlikely that the shelix head causes that much of an increase in current draw?