680.44 should not be used, on the package unit, the unit was not field assy, it was built in a factory, not the field, so that brings us to the inspector, so why should he take on the liability for passing something, that was wired by factory workers, thet may or, may not be qualified to wire the package,
it looks like listed spas, is the only answer, unless the EC wants to take on the liability of the unit wiring, and i don't think his insurance underwriter would be very pleased if he did.