How Often Does Rigid Conduit Need To Be Supported?
How Often Does Rigid Conduit Need To Be Supported? Running threads shall not be used. (Title 24, Part 3, Section 3-346-9(b).) (c) Support. Conduit shall be supported at least every 10 feet. How often does conduit need to be supported? PVC must be supported every 3 ft. for trade sizes 1⁄2 inch through 1 inch.