A/A Fuel GTX
Senior Member
- Location
- WI & AZ
- Occupation
- Electrician
Three wire feeders to sub panels were legal until what code cycle?
Probably around the time equipment grounding conductors became a requirement on everything (but ranges and dryers) at the latest, is my best guess, 1960ish?Three wire feeders to sub panels were legal until what code cycle?
2008 is the first edition to require an EGC.They were legal only to detached buildings with no metallic connections between them and the home up until recently. ...
Assuming you mean to separate structures?Oregon still allows 3 wire feeds. Is anywhere else still allowing them?
2008 is the first edition to require an EGC.
So within the same structure, a 3 wire feeder to a sub panel was never legal?
So within the same structure, a 3 wire feeder to a sub panel was never legal?
Assuming you mean to separate structures?
Whichever the case may be, a feeder with a grounded conductor.Are talking about three phase without a neutral or a residential 120/240 feeder?
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Whichever the case may be, a feeder with a grounded conductor.
This brings up a noteworthy point. The three in three-wire feeder refers to the number of circuit conductors. EGC is not included. I believe most participating or reading this thread understand we are discussing the associated equipment grounding of said feeder on the load end.
That's why I stated what I did.The OP is kinda vague and I don't think that it's good to assume that it was clear to everyone.
The fact it supplies a separate building makes a difference. As mentioned 2008 NEC is the year all new installations were required to have separate EGC to separate buildings. Before then it was allowed, with conditions. If it is 10 years old it very well could have been legal at time of install - and still would be under later codes as long as you are not replacing the feeder.This is a 3 wire, 30A/240V, Black/Red/White feeder from a residence to a detached garage. No EGC present. Wiring method is UF. Grounded conductor is bonded to the sub panel. It was written up by a home inspector as being a violation. Sub panel has been in for 10 years.
This is a 3 wire, 30A/240V, Black/Red/White feeder from a residence to a detached garage. No EGC present. Wiring method is UF. Grounded conductor is bonded to the sub panel. It was written up by a home inspector as being a violation. Sub panel has been in for 10 years.
They were legal only to detached buildings with no metallic connections between them and the home up until recently. Subpanels within the same buildings have always been required to have a separate EGC of some type (wire or approved conduit).
The fact it supplies a separate building makes a difference. As mentioned 2008 NEC is the year all new installations were required to have separate EGC to separate buildings. Before then it was allowed, with conditions. If it is 10 years old it very well could have been legal at time of install - and still would be under later codes as long as you are not replacing the feeder.
Legal as long as there were no other metallic paths between the buildings, like a water pipe, phone or CATV cable, branch circuit switching, gas piping or water piping.
I do not know this to be a fact but I would still bet money that those restrictions are much newer then the allowance to use the neutral as the grounding means at remote structures and buildings.