Timeline for NEC 2020 Compliant feed to an outbuilding
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 13, 2020 at 0:42 | comment | added | Tom Getzinger | Thanks ThreePhaseEel. I just didn't want a ton of repeated info. Harper, if I go with 1 AWG AL in 1.5" conduit, I believe the 100A breaker in the garage is enough. If I wanted to limit to 70A, I could place a 70A breaker in the mini-panel. I still haven't seen an answer to whether I must have a breaker there or if the one in the garage is sufficient. If I don't hear back, I may just use lugs there. If AHJ says I need a breaker, that's an easy add. | |
| Aug 12, 2020 at 23:02 | comment | added | ThreePhaseEel | @TomGetzinger -- you are correct in starting a new question btw, so there's absolutely no need to be apologetic about it :) | |
| Aug 12, 2020 at 20:07 | comment | added | Tom Getzinger | With further research, I think you are right, Harper, the 100A panel does come with a 100A breaker. But, if I stick with that, do I need to size the feeder wire to support 100A? I would think if I don't, I risk potentially overloading the feeder wire. Maybe not now, but if someone adds more circuits in the garage... | |
| Aug 12, 2020 at 19:44 | comment | added | Tom Getzinger | To answer my own Q above, I believe I should use 1.5" Schedule 80 PVC conduit to go from the house under the road to the garage. I believe that will work for 2 or 1 AWG. Not sure on 1/0, but I probably won't go that thick. | |
| Aug 12, 2020 at 19:21 | comment | added | Tom Getzinger | $600 sounds way cheaper than the ~$3,500 for the Square D the other person had. And, yes, full plan is 200A to house main panel (I assume that can be main lug on the other side of the wall from this panel), and on the mini-panel, have 40A go into the house, 70A go to the garage, and 60A go to another outbuilding next to the main house (a bunk house). I'm still wondering if the outbldg feeds can just be lugs on the mini-panel (since there is a 200A breaker between them and the meter) or if I need breakers in the mini-panel and again in the outbuildings. | |
| Aug 12, 2020 at 19:20 | comment | added | Tom Getzinger | The BR270 is the main breaker in the garage. I don't believe the 100A panel comes with any breakers (is that what you meant by the 100 handle?). I could get a 100A, but then I'd definitely need beefier feeder wire, right? No need for data. Once the well goes in, water will flow across the street to the house, but that's on the opposite side of the property from the garage. | |
| Aug 12, 2020 at 18:23 | comment | added | Harper - Reinstate Monica | OK so that $600 panel is a meter + dual main (once upgraded) plus mini-subpanel on one side. Come off that into the house to two subpanels. OK works for me. Shame it's so expensive, but we're all at teething pains with this new outside disconnect requirement. | |
| Aug 12, 2020 at 18:10 | comment | added | Harper - Reinstate Monica | Do you have any expectation to want to bring other utilities over there? Water? Data? | |
| Aug 12, 2020 at 18:01 | comment | added | Harper - Reinstate Monica | What's the BR270 for? There's no earthly reason to replace the disconnect switch with a "100" on the handle, with a disconnect switch with a "70" on the handle. That does not help you in any way. Better to spare that money and put it into more panel spaces. | |
| Aug 12, 2020 at 17:48 | comment | added | Ed Beal | You do not need red tape. black, white and green are all that is required even on a 3 phase job unless a wild leg then it is required to be orange. | |
| Aug 12, 2020 at 17:39 | comment | added | Tom Getzinger | One more question. Any requirement or even recommendation for the width of the trench? | |
| Aug 12, 2020 at 17:22 | comment | added | Tom Getzinger | Reading more, I think I need 2 AWG XHHW-2, not 4. I was looking at the 90C column. I also saw comments about going up to 1 or 1/0 for futureproofing. What conduit size do I need for 2, 1, or 1/0? | |
| Aug 12, 2020 at 17:20 | comment | added | Tom Getzinger | It is a public road (county road). I originally asked about a 2nd service. That becomes costly each month, as there is a minimum monthly charge for each service. I doubt anyone would want to dig there - it's a public road, but my house is on one side, and my garage on the other. This is one of many houses built similarly on this road. With that said, I will definitely check with the county what is involved in doing this. | |
| Aug 12, 2020 at 17:15 | comment | added | PhilippNagel | Is the road between the house and garage public or private? If public, it may honestly be easier to get a second service placed there. You would have to deal with right-of-way permits, and locating your private utility in the pubic right-of-way whenever someone wants to dig in the vicinity. | |
| Aug 12, 2020 at 16:59 | comment | added | Tom Getzinger | One more note. On two of the XHHW-2 wires, I believe I need three bands of electrical tape on each end: one with white (for the neutral), and one with red (for the second hot? not sure of correct term). Is that right? I can get colored XHHW-2, but only in 500 or 1000' spools. | |
| Aug 12, 2020 at 16:57 | history | asked | Tom Getzinger | CC BY-SA 4.0 |