Abstract: An improved electrical panel assembly of the type providing a plurality of receptacles for use with cable connectors and requiring that the connectors must be connected with their respective receptacles in a given order and disconnected therefrom in the reverse of that order. The panel assembly comprises a planar panel element having an opening therein for each receptacle and a receptacle mounting housing element behind each panel opening, constituting an integral, one-piece molding. Each panel opening is provided with a cover swingable between a closed position and an open position. The connectors and receptacles are of the known type having single contacts which lock together when the connector is mated with the receptacle and rotated a partial revolution. Polarizing devices are provided in association with each receptacle and each cable connector.