![]() Looked in both panels and that is the only circuit fed with multiple wires like that.Ĭheck your voltage drop, under load, at the panel your welder is powered from. I opened it today and it has 2-6awg wires for each hot leg coming from the main panel. ![]() The sub-panel was there when we moved in so we just fed welder from it. So you have the 1 sub panel off of a service entrance "main" panel? Or are you saying your "main" panels are other sub-panels off of service entrance = panel powering the welder circuit is daisy chained several panels deep? The welder now is powered off a sub-panel that has 100 amp breaker in it which is fed from one of the main panels off a 100 amp breaker. I believe I can still fit 2-2-6 in 1" conduit according to southwires calculator. Looking at your formula I think I actually may need #2 and use a 125 smp breaker. Don't really have room in the budget right now for another welder. I bought an Invertig 221 a while back but ended up taking it home during the Covid shutdown and decided I like having it at home. It seems that's what most rides are going with these days not sure why. Yeah, we do a lot of work on amusement rides etc. I guess your Syncrowave can be jumpered for 200 volts, so bigger conductors is the only concern. Not a wire in the world can lose only one volt. At 253 volts, a 230 volt motor runs cooler, with more torque than at 207. Still, they perform best at or above design voltage. Motor manufacturers agree to build motors to function plus or minus 10% from nameplate rating. I'm not a fan of 208 volt WYE three phase. If I recall correctly, mine Dynasty 280DX draws 37 amps 240 volt single phase. Your situation would surely benefit from a Dynasty, or other inverter able to sort out single phase, or three, at any voltage from 200 to 600 50 or 60 cycle. I could plug it into a separate circuit but I know if I did that I would forget to turn it on at some point. The reason I added the cooler is it is plugged into the 110 outlet on the welder. In any case 200 amps would hold any load. I'm not clear where the cooler belongs in this equation. I'm presuming 240 volt incoming power & 230 is welder design voltage.īreaker can be up to 200% for the welder. as long as your system of service conductors, feeder conductors etc, don't contribute much voltage loss at all. KIL/Ed = CMA 12.9 X 111 X 300 / 10 = 42957ĬMA is cross sectional area in circular milsĤ2957 is less than 52620 of #3 from table 8 Chapter 9 NEC. column as some terminal will be limited to 75 degrees C.ģ-3-6 conductors THHN will fit at under 40% fill. 81.9 + 6 = 87.9 You need #3 THHN to comply with code because you must use the 75 degree C. Your circumstances may be different.Ī 60% duty cycle welder needs at least. Don't know if I1max is listed on your nameplate. I have it in mind that yours is similar in load. I had a Dialarc 250HF it was rated 105 amps max at 60%.
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