An electrical power or electronic data unit includes an outer housing and an inner housing that is insertable into the outer housing. The outer housing has an outer front face panel defining an outer receptacle opening and the inner housing has an inner rear housing portion plus an inner front face portion defining an inner receptacle opening aligned with the outer receptacle opening. A circuit board substrate is positioned inside the inner housing with an electrical contact mounted to the board substrate and aligned with and accessible through the inner and outer receptacle openings. A contact support extends rearwardly from the inner front face portion adjacent the inner receptacle opening, the contact support serving to limit movement of the electrical contact during insertion of a plug or prong into engagement with the electrical contact.