A sealed power distribution module includes a nonconductive body defining a terminal receptacle, a barrier seal engaged to and surrounding the body adjacent the receptacle on an exterior surface of the body, a terminal element grid fitted within the receptacle, and provisions for installing commercially available sealed terminals to complete the wiring. The grid is engaged to the body at a location interior to the barrier seal. The power distribution module may also include one or more bus bar assemblies oriented such that simultaneous switching of relay packages is possible.