Mike Dolt Enterprises
Mike Dolt Enterprises
User: dennis5150, Location: Mission Viejo, CA
Asked on: Wednesday, March 23, 2011 at 11:32 am EDT
Answered on: Tuesday, May 14, 2024 at 3:09 am EDT
Question: The contractor asked if he could use NEMA 4x enclosures or Form 7 LB's as pull points (pull boxes) and sealed all of the conduit openings with seaing putty (duct seal). No arcing, sparking or heat generating devices, terminations, or splices would be inside, these are simply pull boxes or LB's, and the cables would simply pass through. It would seem that this would comply with 502.10 (4), and 502.15 (1) and FPN, but would appreciate any input. Thanks.
Yes, NEMA 4x enclosures or Form 7 LB's can be used as pull points (pull boxes) as long as they meet the requirements of 502.10 (4) and 502.15 (1) of the National Electrical Code (NEC).502.10 (4) Pull Boxes.- Shall be accessible.- Shall not contain devices, terminations, or splices unless they meet the requirements of 502.15.502.15 (1)- In damp or wet locations, where condensation or splashing liquid can occur, boxes, conduit bodies, and fittings shall be listed for use in such locations.- All openings shall be sealed with sealing putty (duct seal) or other approved means.
FPN: It is recommended that boxes, conduit bodies, and fittings with unused openings have such openings closed with sealing plugs or closed with sealing putty, duct seal, or other approved means.As long as the enclosures or LB's are accessible, do not contain any arcing, sparking, or heat-generating devices, terminations, or splices, and all conduit openings are sealed with sealing putty, they would be compliant with the NEC requirements for pull boxes. Flag for review