Electrical · E-AB8VG

Roof Conduit Support

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A feeder or branch circuit raceway is carried across the roof on a rubber channel support measuring five inches high by six inches wide, such as a B-Line Series C or equal. A Unistrut number P-1000 galvanized channel is secured to the top of the rubber support block using two one-quarter-inch by one-and-a-half-inch lag screws. The rigid steel conduit is held in place within the Unistrut channel by a galvanized Unistrut pipe clamp sized as required. Channel supports must be installed at a maximum spacing of eight feet center-to-center, with a minimum distance of three feet from each termination, per manufacturer recommendations. The support block is attached to the roof surface with mastic, which must be coordinated with the roofing contractor.

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