- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
I don't get the ordeal. You do not need to do a volume calc if the conductors are #4 or larger. The volume is based on 314.28 using conduit size. We all know this and we all assume that the math was done based on conduit size that the art. address. You know a 1" conduit cannot have 3/0 copper conductors so the dimensions are probably based on the largest size possible for a given size conductor. Overkill in most cases for sure. Tell me where this is an issue for someone to know volume of the wires 4 or larger.
The op's question is simply answered by saying he must use 314.28
Ok, here is what I have. I have a 2" raceway containing six #2 conductors and one # 4 conductor entering a box from the top. Then two 1" raceways containing three #4 and one #6 in each raceway entering the bottom of the box. The box is/will be mounted on the wall. The box is for splicing the #2 conductors to the #4, and for splicing the #4 EGC to the #6 EGC.
I just need to know the box size needed. I'm not used to splicing large conductors and didn't think of 314.28.:happyno:
I'm used to 314.16 and the table (B) so I automatically went there.