most tanning beds i ran into most were plug in attachment but the much larger one useally are hardwired and with single phase unit i just simply put in a pullout disconnnect switch.
for 3 phase unit it is little diffrent but not a whole lot most 3?'s useally are twist lockers.
for the BB.,, AFAIK most have plug and connector device so you can plug in one side and connector on other side of BB. [ with the unit with 30 amp supply or smaller but larger one useally are hardwired ]
Merci,Marc