Originally Posted by The Nebuchadnezzar
12v wiring question: a lot of the 12v devices have a single hot wire to them then they're grounded to the frame, my distribution panel has a ground bar, is there any benefit in grounding to the ground bar in the panel vs. grounding to the frame?
On rare occasions it actually does make a difference to run the ground return on a wire of its own. They're the exception though. Most loads (lighting, fans, etc) work fine with a frame/body ground. Do make sure the frame/body-to-source connection is big enough for the aggregate of all the loads! The sort of thing where a separate ground return could help are things like radio transceivers or audio amplifiers -- they can (but don't always) pick up noise through a shared ground path and manifest it as whine or other noise in the audio.