Maintenanceguy:
First and foremost consideration for any band/house/etc source of power is....a responsible person/qualified person on-site when any terminations are made. No, not after the fact, but from the moment the 'boys' walk in.
For the country clubs that I worked at, we had a 200 amp, 120/208 3 phase 'band' panel for the ballroom stage, a 200 amp locked disconnect ahead of the panel, and had 1 electrician on site for connect/disconnect. The same type setup was outside near the pool/patio areas.
Granted....it cost $$$ to have a qualified electrician 'on site' for +/- 8 hrs.....but it's cheaper then legal issues here in the lawyer capital!
BTW, a good solution to keep the shaggy hairs, and bald guys out of the panels is a hasp/padlock from backbox to cover...play with the cover screws all you want boys!!!
Installing various voltage/amperage/phase recepts proved to be a waste; no matching male caps owned by the 'boys'.
