Allowable Fill For Outdoor Cable Trench
Allowable Fill For Outdoor Cable Trench
(OP)
I've looked through the NEC but I can't seem to find anything that points to the allowable fill for outdoor precast cable trench. Does anyone know the applicable guide/section for this?






RE: Allowable Fill For Outdoor Cable Trench
Art.390 Underfloor Raceways
(C) Trench-Type Raceways Flush with Concrete
390.6 Maximum Number of Conductors in Raceway
shall not exceed 40 percent of the interior crosssectional area of the raceway.
RE: Allowable Fill For Outdoor Cable Trench