DMG_1
Member
- Location
- Boston, MA, USA
I have an electric duct bank design that is presently has 6 circuits:
(2) 22.9 kV Lines - 350 MCM
(4) 4.16 kV Lines - 750 MCM
Six circuits would classify this, according to NEC 310.60, as Detail 3. I am thinking about splitting this up into two seperate electrical duct banks so that each would be classifed as Detail 2. The difference in conductor ampere rating between Detail 2 and Detail 3 is approximately 20%. I am looking for information indicating the distance of seperation between the two electrical duct banks so that they can be considered seperate entities. Can anyone give me some insight on this?
Thanks.
(2) 22.9 kV Lines - 350 MCM
(4) 4.16 kV Lines - 750 MCM
Six circuits would classify this, according to NEC 310.60, as Detail 3. I am thinking about splitting this up into two seperate electrical duct banks so that each would be classifed as Detail 2. The difference in conductor ampere rating between Detail 2 and Detail 3 is approximately 20%. I am looking for information indicating the distance of seperation between the two electrical duct banks so that they can be considered seperate entities. Can anyone give me some insight on this?
Thanks.