Hey, how is everybody? With the NEC requirement that the conduit body (an LB in my case) be twice the cross-sectional area of the largest conduit (1/2" EMT), is the proper calculation pie times the radius squared? I would have posted this on the calcs forum but for some reason I was denied access so thanks for anything anybody has to offer.
Sizing conduit bodies
- Thread starter pvitt
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- Illinois
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- retired electrician
There are no calculations required. The manufacturer designs the conduit body to comply with that code rule.
Are you manufacturing a conduit body? If not, I think you can safely assume that any listed conduit body will meet the basic design rules given the size conduit terminations on it. If you have a larger conduit than the terminations on the body, and are wanting to use a reducer, then I could perhaps see why you're asking. I'd avoid reducing down a conduit if at all possible, and in fact prefer to oversize a conduit body one size than go the other way.
You could use pi * r^2 for the area of a conduit. But it is probably better to look in table 4 of chapter 9 under the Total Area 100% column.
You could use pi * r^2 for the area of a conduit. But it is probably better to look in table 4 of chapter 9 under the Total Area 100% column.
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