I have a 150 amp 30 circuit panel in this house.I am going to run a 100 amp feeder from the 150 amp panel to a pole barn 50 feet from the house.My question is.I want 100 amp wire from the house to the pole barn.Table 310.16 says 75degree wire would be a #3 from the table.Can I use table 310.15(B)(6)says I can use #4 wire for 100 amps.Would you use #3 or #4 for this prodject?
Residential Pole Barn
- Thread starter z-men
- Start date
- Status
bphgravity
Senior Member
- Location
- Florida
Re: Residential Pole Barn
It is my opinion that Table 310.15(B)(6) is reserved for main service or main feeders to a dwelling. If you read 310.15(B)(6), it states that the feeders for this section shall be the conductors between the main disco. and the lighting and appliance panelboard. You are going from the loadcenter to another panelboard (subpanel). Table 310.16 would apply for these conductors.
It is my opinion that Table 310.15(B)(6) is reserved for main service or main feeders to a dwelling. If you read 310.15(B)(6), it states that the feeders for this section shall be the conductors between the main disco. and the lighting and appliance panelboard. You are going from the loadcenter to another panelboard (subpanel). Table 310.16 would apply for these conductors.
- Location
- Bremerton, Washington
Re: Residential Pole Barn
I agree the feeder to the barn would fall under 310.16. The issue of what the main power feeder is, was clarified in the 1999 NEC.
You could always ask your AHJ for their opinion.
I agree the feeder to the barn would fall under 310.16. The issue of what the main power feeder is, was clarified in the 1999 NEC.
You could always ask your AHJ for their opinion.
luke warmwater
Senior Member
Re: Residential Pole Barn
I agree with Bryan and Tom, use the #3.
I agree with Bryan and Tom, use the #3.
Re: Residential Pole Barn
Z-Men,
You could use #2 al. direct use and still maintain the 100 amp system with no problem. Question is the house has 150 amp service and you are running a 100 amp service out to pole barn. Will both the house and barn survive on 150 amp total, have you ask the owner what he has intended to do in his pole barn? Does the house have A/C, electric range, electric Dryer that all could possibly be running at the same time as well as a welder in the barn
Doug
Z-Men,
You could use #2 al. direct use and still maintain the 100 amp system with no problem. Question is the house has 150 amp service and you are running a 100 amp service out to pole barn. Will both the house and barn survive on 150 amp total, have you ask the owner what he has intended to do in his pole barn? Does the house have A/C, electric range, electric Dryer that all could possibly be running at the same time as well as a welder in the barn
Doug
roger deas
Member
- Location
- North_Carolina
Re: Residential Pole Barn
Doug,
If so, this would mean we have a Main Breaker / Disconnect downstream of a Main Breaker / Disconnect.
Roger
Doug,
so you are saying this feeder to the barn is a Main Power Feeder, and the 100 amp breaker in the "lighting and appliance branch-circuit panelboard" is a Main Breaker.
If so, this would mean we have a Main Breaker / Disconnect downstream of a Main Breaker / Disconnect.
Roger
Re: Residential Pole Barn
Bennie, if this structure and house were served per 230.40 ex # 3, I think table 310.15(B)(6) would be applicable.
But in the wording of 310.15(B)(6) the feeder from the lighting and appliance branch-circuit panelboard to the barn would not be allowed to be sized per 310.15(B)(6)
Roger
Bennie, if this structure and house were served per 230.40 ex # 3, I think table 310.15(B)(6) would be applicable.
But in the wording of 310.15(B)(6) the feeder from the lighting and appliance branch-circuit panelboard to the barn would not be allowed to be sized per 310.15(B)(6)
Roger
- Status