Okay to MIG on chassis of AC equipment?

admin

Very much a newbie question here.  At work we (not "me", I spend most of my day in the office) do tons and tons of welding on trucks.  We are pretty good about installing battery isolators before doing anything to protect ECU's and other on-board electronics.I'm helping a friend with a simple little cart for a pizza over.  The oven has some on-board electronics like timers, relays, thermocouples, motors for the conveyors, etc.  All that runs of 120 AC.  The oven will mount to the cart on four mounting plates that each have 4 bolt holes. It'd make life a lot easier if I could bolt the mounting plates to the oven, set it down on the frame, tack the plates to the frame, then lift the oven off to finish weld everything.  I just worry, based on the horror stories about frying ECU's, that it might damage some electronic bits.  If I've got a good ground very near where I'm tacking, am I risking messing anything up?  From a hole alignment perspective, I don't quite trust myself to layout the mounting plates accurately enough to get all 16 bolts in, without essentially using the oven as a jig.If I was really worried about it, would bolting the mounting plates to the oven with nylon bolts and a thin sheet of rubber between the oven while tacking be good insurance?Last edited by nogirlsatgt; 08-28-2014 at 09:30 AM.