Electrical receptacle connectors are provided including an insulative housing and AC power contacts disposed therein that are configured for engaging an external power supply. The receptacle connectors are employed with a safety guard for restricting operator access to hot AC power contacts when disconnected from complementary header connectors. Preferred safety guards include projections extending along at least a portion of perimeter areas surrounding housing apertures that provide access to engaging portions of the AC power contacts. The projections define a safety gap between human digits directed toward the housing apertures and the AC power contacts.