Kyle2022
Electrical
- Jan 26, 2005
- 20
Good morning folks,
I am trying to size some 15kV cables that will be laid in cable trench. I would rather not use ventilated cable trench though some have said these can achieve "free-air" ratings.
I've gotten my hands on a study titled "Ampacity of Conductors in Ventilated Cable Trench" by Emil F. Buettner, P.E. of Oklahom Gas & Electric, 1985. This is somewhat useful, but, again, for ventilated trench.
NEC applies here, but there is nothing that applies specifically to trench. Does anyone have any thoughts on this matter? Or, maybe there is a table in NEC that has been deemed acceptable to use for cable trench installation?
Thank you for your time,
Kyle
I am trying to size some 15kV cables that will be laid in cable trench. I would rather not use ventilated cable trench though some have said these can achieve "free-air" ratings.
I've gotten my hands on a study titled "Ampacity of Conductors in Ventilated Cable Trench" by Emil F. Buettner, P.E. of Oklahom Gas & Electric, 1985. This is somewhat useful, but, again, for ventilated trench.
NEC applies here, but there is nothing that applies specifically to trench. Does anyone have any thoughts on this matter? Or, maybe there is a table in NEC that has been deemed acceptable to use for cable trench installation?
Thank you for your time,
Kyle