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Two 240v 15 amp motors off single 240v 30 amp outlet?

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发表于 2022-7-3 15:51:54 | 显示全部楼层 |阅读模式
First reason for the odd question. :-)I’m off grid and only have one big generator and only have one 240v 30 amp outlet.I need to setup to run two 240v 15 amp motor air compressors. Currently I run line from 240v 30 amp generator plug to  sub panel with 240v 20 amp breaker and corresponding outlet that one compressor plugs into.I need a second compressor to run in tandem for more CFM. One possibility is setting up the second compressor to run off gas engine but would prefer not to have to do that.Sorry for the long description…Question: can I run line from 240v 30 amp outlet to sub panel and split power to two 240v 15 amp plugs to run both compressors simultaneously?Hopefully this isn’t a stupid question! :-) Cheers, Allen
Reply:How many KW is the generator? Compressors pull a lot of amps on startup however I'll assume your already running one on the gennie. I doubt a 20 amp breaker will start a compressor but I may be wrong.Ol' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Two ways of look at this.1) In construction the compressor will slow down the generator . This works like soft start.2) But powering a home 🏡 you not want the generator to slow more that 10% or 56 Hz or lights will dim and electronics will flicker.Note some generator may need slow blow fuses used to start a motor .The breakers on generators may flip off before the motor starts. Dave

Originally Posted by abosely

First reason for the odd question. :-)I’m off grid and only have one big generator and only have one 240v 30 amp outlet.I need to setup to run two 240v 15 amp motor air compressors. Currently I run line from 240v 30 amp generator plug to  sub panel with 240v 20 amp breaker and corresponding outlet that one compressor plugs into.I need a second compressor to run in tandem for more CFM. One possibility is setting up the second compressor to run off gas engine but would prefer not to have to do that.Sorry for the long description…Question: can I run line from 240v 30 amp outlet to sub panel and split power to two 240v 15 amp plugs to run both compressors simultaneously?Hopefully this isn’t a stupid question! :-) Cheers, Allen
Reply:It’s a 8000 running & 10,000 watt surge generator.The motor is 240v 15 amp supposed to run on a 240v 15 amp outlet.I got it new but with a blown motor, they tried to run it on 120v, fried the motor. :-) It’s a Kobalt 60 gallon 3.7hp 11.5 CFM at 90 psi. Got a 5hp motor of same brand & specs, 240v, 15 amp 3450 rpm because 3.7hp wasn’t available, same 240v, 15 amp.The generator runs the H190 fine and H210 when had it too.Cheers, AllenLast edited by abosely; 7 Hours Ago at 08:12 PM.
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