NEC User
Senior Member
- Location
- Marlboro, NJ, USA
What code section indicates that a pull box is required prior to service entrance conductors going to the main distribution panel within a building?
I found this online:
Service Entrance Pull Box: The primary service shall enter the building through a multi-cell concrete duct envelope in the basement wall and not directly into the unit sub-station. Provide a No. 12 gauge sheet steel pullbox over the ducts. Box size shall be determined by the number of ducts to be covered as well as the sizes of cables entering or leaving the box. Provide a steel barrier to separate the ducts for use of low voltage fire alarm and signal cables. The box shall have a screw-on cover and shall be painted with two coats of gray enamel paint with "high voltage" stenciled on cover. The depth of box shall be a minimum of 9 times the diameter of the primary cable.
Because this is a service entrance box, bushings and grounding are required in this box. Cables are required to be identified in the box.
Comment: In the past, the U of I has had several problems with water entering the building through the service entrance box. Conduits should have an upward slope coming to the building, the exterior of the raceway should be sealed at the foundation wall and the interior of the raceway should also be sealed, with or without wiring installed.
I found this online:
Service Entrance Pull Box: The primary service shall enter the building through a multi-cell concrete duct envelope in the basement wall and not directly into the unit sub-station. Provide a No. 12 gauge sheet steel pullbox over the ducts. Box size shall be determined by the number of ducts to be covered as well as the sizes of cables entering or leaving the box. Provide a steel barrier to separate the ducts for use of low voltage fire alarm and signal cables. The box shall have a screw-on cover and shall be painted with two coats of gray enamel paint with "high voltage" stenciled on cover. The depth of box shall be a minimum of 9 times the diameter of the primary cable.
Because this is a service entrance box, bushings and grounding are required in this box. Cables are required to be identified in the box.
Comment: In the past, the U of I has had several problems with water entering the building through the service entrance box. Conduits should have an upward slope coming to the building, the exterior of the raceway should be sealed at the foundation wall and the interior of the raceway should also be sealed, with or without wiring installed.
