If Bubba only connects the genny ground and not the neutral to the welder plug ground, yeah, the 120 can get really wonky, especially if he's actually pulling 240 off the generator. It can also get wonky if the system ground/neutral tie point is a significant distance from the welder plug.
Knew one guy (a Bubba wannabe) who killed the compressor in his fridge because he hooked the genny Hot wire to one leg of his welder outlet, and Neutral to the other from a cut off extension cord, splitting a floating 120 between both phases. At least he properly connected the ground... O_o I'm guessing the fridge was trying to run on about 80 volts. I had to explain why the lights were going from not quite bright to dim as it tried to cycle.
Scott, to verify what buickanddeere said, yes a 4 wire (twistlock) plug and cord from the generator takes care of both providing a proper isolated neutral and bonding the generator frame to system ground.
A local electrical supply house has a Clint Eastwood quote on the wall behind the counter that is very apt, in a font size that can not be missed: "A man has to know his limitations." Unfortunately, the ones who should heed it most, don't get it.
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Today's Featured Article - On the Road with Dave Gohl: Deere Departed Friend - by Dave Gohl. Have you ever had to part with a dear friend? It's not easy. If it's due to death, your feelings could be in disarray for days, months or even years. Even now after almost 4 years, I still miss my dad. I remember when I was a kid my dad sometimes would tuck my brother and I in at night and we would ask him questions about his childhood on the farm. To this day, it's some of the best stories I've ever heard. And now, I'm so glad that I asked those questions, and if I were a little smarter i
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