underground conduit
- Thread starter j87
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: underground conduit
A few off of the top of my head, service entrance conductors inside of a building, feeders for fire pumps inside of a building.
A few off of the top of my head, service entrance conductors inside of a building, feeders for fire pumps inside of a building.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: underground conduit
The NEC does not require service entrance conductors inside of a building to be concrete encased, local codes may. However when concrete encased, the conductors are considered outside of the building, for example running feeders thru a ceiling would require a disconnect at each building if a multiunit building, but by running encased in concrete there is no disconnect requirement.
The NEC does not require service entrance conductors inside of a building to be concrete encased, local codes may. However when concrete encased, the conductors are considered outside of the building, for example running feeders thru a ceiling would require a disconnect at each building if a multiunit building, but by running encased in concrete there is no disconnect requirement.
- Location
- Massachusetts
Re: underground conduit
The NEC does not really allow service entrance conductors inside a building.
?
The NEC does not really allow service entrance conductors inside a building.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: underground conduit
Bob: I think you and Tom are essentially saying the same thing. I think that what Tom meant was that you can bring service conductors past the wall that separates inside from outside. But if you do, you need to encase them in concrete. That causes them to be considered still outside the building, so that you don?t need to install a disconnect until you bring them up from the concrete encasement. But beyond this scenario, there is no requirement that the service conductors ever be encased in concrete.
One more consideration is that once the service conductors are inside the building, you need to install a disconnect. Washington State Code requires that disconnect to be within 15 feet of the point at which the conductors are no longer "outside the building." I don't think the NEC specifies a distance limit. I can look it up after I unpack my NEC.
Bob: I think you and Tom are essentially saying the same thing. I think that what Tom meant was that you can bring service conductors past the wall that separates inside from outside. But if you do, you need to encase them in concrete. That causes them to be considered still outside the building, so that you don?t need to install a disconnect until you bring them up from the concrete encasement. But beyond this scenario, there is no requirement that the service conductors ever be encased in concrete.
One more consideration is that once the service conductors are inside the building, you need to install a disconnect. Washington State Code requires that disconnect to be within 15 feet of the point at which the conductors are no longer "outside the building." I don't think the NEC specifies a distance limit. I can look it up after I unpack my NEC.
- Location
- Massachusetts
Re: underground conduit
It is certainly a posability.
- Status