At 03:44 AM 11/9/98 -0800, you wrote: Not necessarialy. It could be grounded or it could be floating. But as long as the connector supplies power and the return path (two wires supplying + and -), you should be able too leave it disconnected from ground with no problem. Circuits are grounded for two reasons; (1) to provide a power return path through the chassis and saving the cost of a wire or (2) for safety reasons. Reason 1 is a poor practice since chassis grounds aren't very reliable and cause galvanic corrosion. Reason 2 is generally only required in high voltage (> 100 Volts) crcuits. Joe