Goanna Posted June 7, 2017 Share Posted June 7, 2017 These guys building our car port, have cobbled my inverter welder to their own machine, and running two hand pieces. Bugger me. Never seen this before, and I am a boilermaker by trade. Any derogoratory comments, just don't please. Link to comment Share on other sites More sharing options...
Crossy Posted June 7, 2017 Share Posted June 7, 2017 Nah, no issue using a single common point. The guys doing our roof had two, often three welders in action all commoned to a single bit of re-bar poking out at ground level. Are both machines running of a single outlet? Link to comment Share on other sites More sharing options...
stubuzz Posted June 7, 2017 Share Posted June 7, 2017 Is that safe joining an inverter and an arc like that. I know 2 arcs can be put in parallel to bump up the amps, but i see the inverter earth is connected to the arc live. Link to comment Share on other sites More sharing options...
Goanna Posted June 7, 2017 Author Share Posted June 7, 2017 9 hours ago, Crossy said: Nah, no issue using a single common point. The guys doing our roof had two, often three welders in action all commoned to a single bit of re-bar poking out at ground level. Are both machines running of a single outlet? No. The inverter is in a gpo, and the other is joined directly to the power up on the pole. My side of the meter. I see now, that is just the same as being earth on the same job. The earth clamped directly onto the terminal had me tricked. Cheers. Link to comment Share on other sites More sharing options...
RichCor Posted June 8, 2017 Share Posted June 8, 2017 18 hours ago, stubuzz said: Is that safe joining an inverter and an arc like that. I know 2 arcs can be put in parallel to bump up the amps, but i see the inverter earth is connected to the arc live. In this instance they are not running them in series, just connecting to the common (metal ground) point. I'm guessing the arc welder is running EN (Electrode Negative), so the positive terminal is clamped to common. Electrons return to the transformer they originated from. Just have to hope they don't overwhelm the common cable. Link to comment Share on other sites More sharing options...
Jdietz Posted June 8, 2017 Share Posted June 8, 2017 Smart little things those electrons, so you're saying they have memories? Link to comment Share on other sites More sharing options...
RichCor Posted June 8, 2017 Share Posted June 8, 2017 Simplistic, I know. It's more like musical chairs, while death metal music is playing. Link to comment Share on other sites More sharing options...
timkeen08 Posted June 11, 2017 Share Posted June 11, 2017 Good point Jdietz. Electrons do not care in a closed loop parallel system. They have a common return and go where needed. If you give them a path of least resistance to go to than the system, they will go. Never will return home.Sent from my SAMSUNG-SM-N910A using Tapatalk Link to comment Share on other sites More sharing options...
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