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I am building a house and need to run wire from the meter to the breaker panel. I've pulled my own permit and done this before, but it was a short distance (~50') and I just went and bought 4/0,4/0,4/0,2/0 SER and wired straight from the meter to the panel in 2" SCH80 PVC raceway.

In my current home though the distance from the meter to the house is going to be ~250', and needs to be buried underground, so I plan to use individual wires. According to the NEC, I should add 20% to the AMP for each 100 feet, so I am estimating 50% more which makes it 300 AMPS. Using the 83% rule, that means I need a wire sized for 249 amps, or ideally 300 MCM aluminum.

My issue is that the breaker panels I am looking at have a max wire size of 250 kcmil. And I am not really sure what the maximum wire size at the meter is either.

Do I just run 4/0 from the meter to a junction box located near the meter, then run 300MCM from the junction box to another junction box near the front of the house, and then 4/0 from there to the breaker panel? Is there another obvious solution I am missing here?

I am building a house and need to run wire from the meter to the breaker panel. I've pulled my own permit and done this before, but it was a short distance (~50') and I just went and bought 4/0,4/0,4/0,2/0 SER and wired straight from the meter to the panel in 2" SCH80 PVC raceway.

In my current home though the distance from the meter to the house is going to be ~250'. According to the NEC, I should add 20% to the AMP for each 100 feet, so I am estimating 50% more which makes it 300 AMPS. Using the 83% rule, that means I need a wire sized for 249 amps, or ideally 300 MCM aluminum.

My issue is that the breaker panels I am looking at have a max wire size of 250 kcmil. And I am not really sure what the maximum wire size at the meter is either.

Do I just run 4/0 from the meter to a junction box located near the meter, then run 300MCM from the junction box to another junction box near the front of the house, and then 4/0 from there to the breaker panel? Is there another obvious solution I am missing here?

I am building a house and need to run wire from the meter to the breaker panel. I've pulled my own permit and done this before, but it was a short distance (~50') and I just went and bought 4/0,4/0,4/0,2/0 SER and wired straight from the meter to the panel.

In my current home though the distance from the meter to the house is going to be ~250', and needs to be buried underground, so I plan to use individual wires. According to the NEC, I should add 20% to the AMP for each 100 feet, so I am estimating 50% more which makes it 300 AMPS. Using the 83% rule, that means I need a wire sized for 249 amps, or ideally 300 MCM aluminum.

My issue is that the breaker panels I am looking at have a max wire size of 250 kcmil. And I am not really sure what the maximum wire size at the meter is either.

Do I just run 4/0 from the meter to a junction box located near the meter, then run 300MCM from the junction box to another junction box near the front of the house, and then 4/0 from there to the breaker panel? Is there another obvious solution I am missing here?

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esac
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  • 24

Wiring from meter to panel over longer distances

I am building a house and need to run wire from the meter to the breaker panel. I've pulled my own permit and done this before, but it was a short distance (~50') and I just went and bought 4/0,4/0,4/0,2/0 SER and wired straight from the meter to the panel in 2" SCH80 PVC raceway.

In my current home though the distance from the meter to the house is going to be ~250'. According to the NEC, I should add 20% to the AMP for each 100 feet, so I am estimating 50% more which makes it 300 AMPS. Using the 83% rule, that means I need a wire sized for 249 amps, or ideally 300 MCM aluminum.

My issue is that the breaker panels I am looking at have a max wire size of 250 kcmil. And I am not really sure what the maximum wire size at the meter is either.

Do I just run 4/0 from the meter to a junction box located near the meter, then run 300MCM from the junction box to another junction box near the front of the house, and then 4/0 from there to the breaker panel? Is there another obvious solution I am missing here?