A modular power distribution system, comprising a client device configured to be inserted into a host device, and having a series of independently configurable electrical connections and predetermined electrical connections connecting the host device, the client device, and a cable to deliver power from the cable to a peripheral of the client. A modular power distribution system, comprising a host device having first and second compartments, the second compartment being dimensioned to automatically align the client electrical coupler with the host electrical coupler and form a protective barrier while the client electrical coupler is in contact with the host electrical coupler. A modular power distribution system comprising a multi-gang host device and a client assembly, and having a series of independently configurable electrical connections and predetermined electrical connections connecting the multi-gang host device, the client assembly, and a cable(s) to deliver power from the cable the client assembly.