Lately I have been installing alot of new and used spas. When reconnecting used spas I sometimes run across a wiring method where the wires are run in a raceway to the spa enclosure and then it is open wiring to the control box. Most of the time there is a romex connector at the control box. Something doesn't seem right. When I hook up a spa I take a flexable raceway, usually non-metalic, straight to the control box with the appropiate fittings. Are open wires considered concealed in the spa enclosure?