Have a question for anyone who is up on welding. Have a 3 by 5 ft heavy build steel trailer. Have the welder, plasma cutter and wire feed all mounted on the trailer and all Miller. Just added a 6-3 with ground 25 foot feed cable and a sub panel. Does anyone know for sure if it is safe and allowable to run the clamp from all the units to one point and then use only 1 work clamp cable instead of having 3 separate cables. All the cases have the common (green)ground wire attached but not sure if there would be any internal circuit issues bu using one common cable??? As they say a ground is a ground the world around, but does the work side clamp have the common ground potential or is it a floating return to the unit and not common to all 3.