jar546
CBO
The 2017 also brought some other changes to NEC 314.28(A)(3) by specifying how you could handle wires smaller than what was specified for the conduit body and how to achieve that calculation. I'm only going to post the new verbiage:
NEC 314.28(A)(3) Smaller Dimensions
..................For other conductor sizes and combinations, the total
cross-sectional area of the fill shall not exceed the crosssectional
area of the conductors specified in the marking,
based on the type of conductor identified as part of the product
listing.
Informational Note: Unless otherwise specified, the applicable
product standards evaluate the fill markings covered here based
on conductors with Type XHHW insulation.
It may be advisable for everyone to keep the conduit body charts available as the wires is usually already in place and you cannot read the wire limitations embossed inside the back of LB's. You will find that the wrong size LB is often used.
NEC 314.28(A)(3) Smaller Dimensions
..................For other conductor sizes and combinations, the total
cross-sectional area of the fill shall not exceed the crosssectional
area of the conductors specified in the marking,
based on the type of conductor identified as part of the product
listing.
Informational Note: Unless otherwise specified, the applicable
product standards evaluate the fill markings covered here based
on conductors with Type XHHW insulation.
It may be advisable for everyone to keep the conduit body charts available as the wires is usually already in place and you cannot read the wire limitations embossed inside the back of LB's. You will find that the wrong size LB is often used.