OP
GeneV
Elite Member
Guys, here's a thread I started on fume extractors: https://www.tractorbynet.com/forums/welding/429959-dyi-fume-extractor-ideas.html
220v outlet for welder powered by (2) 20 amp breakers
- Thread starter GeneV
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DieselBound
Elite Member
Here's some fun (quick- there's a TON of debate out there) reading on this:
21 .8(B) Ground-Fault Circuit-Interrupter Protection for Personnel. Other Than Dwelling Units.
Receptacles are key here. In general if you have corded devices plugging/un-plugging then there's a concern that cords can become damaged and present a hazard to one's person. The wording of the code is a mess, especially to a lay person.
My garage and shop was built about three years ago, right on the cusp of the 2017 electrical code changes that expanded GFCI use/requirements. The circuit for my compressor, which is hardwired, did not require GFCI protection (it was passed): the 2017 code says that this is OK. At that time I put off a circuit for a welder because I first wanted to find out where I would use one (took me a while to get a feel for my space use), as well as come up with the funds. I JUST purchased a welder (and a plasma cutter) and installed a 50 amp GFCI protected circuit (6awg, 2 wire).:dance1: A 50 amp GFCI breaker added about $80 to the cost of this circuit. I figure that it will help my commitment to my wife of her not having a dead husband
"Code" is "minimum."
grsthegreat
Super Star Member
Gfci is not required on 240v shop equipment. Only on 120v outlets.
DieselBound
Elite Member
From the link I posted above:
As mentioned, it's awkward wording for a lay person.
In my case I'm single phase. I'm 50 amps or less. AND, each conductor IS 150 volts to ground or less. I am not an electrician, in which case I cannot say whether I would only need to test ONE conductor (which would be under the 150 volt limit).
I don't think that a person has any license to proclaim what code means (if it's seemingly ambiguous) IF they are not a licensed electrician.
grsthegreat
Super Star Member
Your circuit is 240 volt. They dont measure each leg. Only 120v circuits (all 120 v circuits) in any shop or garage have to be gfci protected. A 240 volt welder or air compressor does not need to be GFCI protected.
The 2020 code updates this to include 240 volt circuits. But this may or not be adopted.
The 2020 code updates this to include 240 volt circuits. But this may or not be adopted.
ultrarunner
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Does that include a single dedicated outlet behind a garage freezer and a dedicated above 8' outlet for door opener?
All of my code books date from the 1980's when I was heavy into additions and remodels ..
As a side note I love reading home inspection reports on 100 year old homes with knob and tube, copper gas lines, no tempered glass in doors, etc.
All of my code books date from the 1980's when I was heavy into additions and remodels ..
As a side note I love reading home inspection reports on 100 year old homes with knob and tube, copper gas lines, no tempered glass in doors, etc.
DieselBound
Elite Member
A circuit that's dedicated to a machine -not a plug-in- doesn't require a GFCI, that is my reading (all code seems pretty clear on this). Doesn't matter what it is (welder or compressor).
A receptacle that is for an EV DOES require a GFCI protected circuit. The way I read this is that it's really the same for my situation, a plug-in (welder). The theory is the same.
Curious, are you an electrician? I'm intrigued by this issue and am thinking about asking my electrician: though, I actually taught him something that he wasn't all that up on (pertaining to wiring generators for dedicated power)
A receptacle that is for an EV DOES require a GFCI protected circuit. The way I read this is that it's really the same for my situation, a plug-in (welder). The theory is the same.
Curious, are you an electrician? I'm intrigued by this issue and am thinking about asking my electrician: though, I actually taught him something that he wasn't all that up on (pertaining to wiring generators for dedicated power)
grsthegreat
Super Star Member
ALL 120v outlets. Including refrig or freezer and garage door opener.
DieselBound
Elite Member
I think it applies for anything that's plugged in. For sure the freezer. I'd have to look at the circuits for my garage door motors, but I think they're on GFCI circuits as well. I still feel that there's no way you can go wrong by going more than code (yeah, it can cost a few bucks more).
grsthegreat
Super Star Member
im an electrical contractor. Different states use different parts of the NEC. Here in Idaho they never adopt the entire code. But an electric vehicle charger does NOT have to be gfci protected under current codes.A circuit that's dedicated to a machine -not a plug-in- doesn't require a GFCI, that is my reading (all code seems pretty clear on this). Doesn't matter what it is (welder or compressor).
A receptacle that is for an EV DOES require a GFCI protected circuit. The way I read this is that it's really the same for my situation, a plug-in (welder). The theory is the same.
Curious, are you an electrician? I'm intrigued by this issue and am thinking about asking my electrician: though, I actually taught him something that he wasn't all that up on (pertaining to wiring generators for dedicated power)
