Sometimeselectric
Member
- Location
- North Dakota
- Occupation
- Electrician
In an isolated phase installation, with all of the A phase conductors in one pipe, all of B phase in one pipe, all of C phase in one pipe.... do you derate for more than one currrent-carrying conductor in a raceway, or are they considered one conductor?
300.3(B)(1) refers you to 300.20(B) which talks about them like a single conductor.
If this is a service, would your grounded conductor be reduced to the 12 1/2% and only require one conductor?
ex: 2000A service, fed with six 750MCM aluminum per phase in 6" PVC, and then a 2" PVC with one 600MCM for the grounded conductor.
Thanks!
300.3(B)(1) refers you to 300.20(B) which talks about them like a single conductor.
If this is a service, would your grounded conductor be reduced to the 12 1/2% and only require one conductor?
ex: 2000A service, fed with six 750MCM aluminum per phase in 6" PVC, and then a 2" PVC with one 600MCM for the grounded conductor.
Thanks!