I have been progressing slowly with my reprap build, spending a little time here and there modifying the electronics so that the wiring is neater. There are some details on the reprap wiki about how hack an ATX power supply to give you a universal power supply. This is my sightly neater solution which is specifically suited to reprap only.
With minimal filing the standard ATX power supply grommet hole can be opened out to fit a standard XLR socket. I used a female socket as opposed to the male socket mounted on the reprap. This is standard practice and ensures that the pins of the socket cannot be touched if the connector is removed. In general the live end is protected and the cold end is not.