Condulet Fill

[aramg83]

Suppose I have 3#1 phase conductors, 1#6G and 32#12 control wires (all wire rated 600V, for an industrial motor application) in a 3" conduit and an electrician has already installed a bunch of Form 8 LB condulets throughout the run which don't meet the 6x rule.

Per 314.28 (A)(3) Smaller Dimensions: the distance to the opposite wall rule for conduits containing #4 or larger does not have to be adhered to as long as the conduit body has been marked with maximum size of conductors permitted.

In my case, these condulets are stamped at 3#2/0, so my question is this: Are we compliant simply because the only wires in my condulet larger than #4 are the 3#1's which occupy less space than the 3#2/0's or do I somehow have to account for the 1#6 and 32#12's in conjunction in a different manner?

Thanks

 

[infinity]

IMO the code provides little or no guidance on situations like the one that you've proposed. It also doesn't really care about conduit body fill since it's concern is being able to pull in the condcutors without damaging them. For conductors sized #6 and smaller there is no 6X rule for sizing the conduit body and you can use the conduit fill as your guide. {314.28(A)(2)} The 6X rule would apply in this case to the 3#1's. Since the conduit body is suitable for 3-#2/0's I would go out on a limb and say that your instillation is compliant because the code really doesn't say that it's prohibited.

314.28 Pull and Junction Boxes and Conduit Bodies.
Boxes and conduit bodies used as pull or junction boxes shall comply with 314.28(A) through (D).
Exception: Terminal housings supplied with motors shall comply with the provisions of 430.12.
(A) Minimum Size. For raceways containing conductors of 4 AWG or larger that are required to be insulated, and for cables containing conductors of 4 AWG or larger, the minimum dimensions of pull or junction boxes installed in a raceway or cable run shall comply with (A)(1) through (A)(3). Where an enclosure dimension is to be calculated based on the diameter of entering raceways, the diameter shall be the metric designator (trade size) expressed in the units of measurement employed.
(1) Straight Pulls. In straight pulls, the length of the box shall not be less than eight times the metric designator (trade size) of the largest raceway.
(2) Angle or U Pulls, or Splices. Where splices or where angle or U pulls are made, the distance between each raceway entry inside the box and the opposite wall of the box shall not be less than six times the metric designator (trade size) of the largest raceway in a row. This distance shall be increased for additional entries by the amount of the sum of the diameters of all other raceway entries in the same row on the same wall of the box. Each row shall be calculated individually, and the single row that provides the maximum distance shall be used.
Exception: Where a raceway or cable entry is in the wall of a box or conduit body opposite a removable cover, the distance from that wall to the cover shall be permitted to comply with the distance required for one wire per terminal in Table 312.6(A).
The distance between raceway entries enclosing the same conductor shall not be less than six times the metric designator (trade size) of the larger raceway.
When transposing cable size into raceway size in 314.28(A)(1) and (A)(2), the minimum metric designator (trade size) raceway required for the number and size of conductors in the cable shall be used.
(3) Smaller Dimensions. Boxes or conduit bodies of dimensions less than those required in 314.28(A)(1) and (A)(2) shall be permitted for installations of combinations of conductors that are less than the maximum conduit or tubing fill (of conduits or tubing being used) permitted by Table 1 of Chapter 9, provided the box or conduit body has been listed for, and is permanently marked with, the maximum number and maximum size of conductors permitted.