sterlingmoss
New member
CanI use 4/0 aluminum wire to feed a 200amp panel in my garage? the garage is about 200 ft. away from the meter on the house . 
4/0 Feeder Wire
- Thread starter sterlingmoss
- Start date
- Status
Re: 4/0 Feeder Wire
I beleive that with even a 3%(I think you would need to apply 5%) voltage drop you come just shy. I came up with 235,556 cir. mils needed and 4/0 has 211,600. I must add that voltage drop is a fine print note, but I wouldnt try skirting around it. I would try either 250k or 300k. good luck.
I beleive that with even a 3%(I think you would need to apply 5%) voltage drop you come just shy. I came up with 235,556 cir. mils needed and 4/0 has 211,600. I must add that voltage drop is a fine print note, but I wouldnt try skirting around it. I would try either 250k or 300k. good luck.
Re: 4/0 Feeder Wire
What type insulation? Is it overhead, underground, in conduit, UF?
Nathan, with out doing the math, I take it that you are using the 200 amps for your calculation, which would only be necessary if this was a known connected load value. It is doubtful the panel would ever see this or even close to it fo any length of time. (I could be wrong)
Sterling needs to give more detail.
Roger
What type insulation? Is it overhead, underground, in conduit, UF?
Nathan, with out doing the math, I take it that you are using the 200 amps for your calculation, which would only be necessary if this was a known connected load value. It is doubtful the panel would ever see this or even close to it fo any length of time. (I could be wrong)
Sterling needs to give more detail.
Roger
pierre
Senior Member
- Location
- Westchester County, New York
Re: 4/0 Feeder Wire
Sterling
If this feeder is on the load side of the premise service, you can not use 310.15(B)(6).
Table 310.16 shows 4/0 Al at 180 amps. You size the conductor to the overcurrent device-250.122.
If you intend on a 200 OCPD, then you will need a larger conductor, as well as figuring voltage drop.
Pierre
Sterling
If this feeder is on the load side of the premise service, you can not use 310.15(B)(6).
Table 310.16 shows 4/0 Al at 180 amps. You size the conductor to the overcurrent device-250.122.
If you intend on a 200 OCPD, then you will need a larger conductor, as well as figuring voltage drop.
Pierre
Re: 4/0 Feeder Wire
Sterling,I guess we are all assuming that you have already adressed the power source which you are feeding from which i would guess is a residential metered service panel. Hopefully a 400 amp main with distribution. Or are you upgrading the service. It sounds to me like you will be using a lot of machinery in this garage if you need such a large ampacity panel.
Sterling,I guess we are all assuming that you have already adressed the power source which you are feeding from which i would guess is a residential metered service panel. Hopefully a 400 amp main with distribution. Or are you upgrading the service. It sounds to me like you will be using a lot of machinery in this garage if you need such a large ampacity panel.
- Status