4 rigid conduit outside diameter. The wall thickness is . 1976. Trade Sizes and Conduit Sizes Rigid EMT IMC For Additional NEMA Information NEMA KNOCKOUT DIAMETERS AND FITTING DIMENSIONS Wheatland Tube’s steel rigid metal conduit (RMC) is all made and melted in America for jobs that require the physical protection that only the thickest walls can provide. 70mm. 2 of ANSI/UL 514-1978. NEC Chapter 9 Table 4: Dimensions and Percent Area of Conduit and Tubing: EMT (Electrical Metallic Tubing) (2) Maximum Outside Diameter Per ANSI C80. A 4″ Rigid conduit requires a 4. 3mm. 26mm. It has an outside diameter of 4. 5″ hole for the conduit and fittings. A tap needs a 4. 25″ hole. (3) Dimensions for trade sizes of 1/4 through 1-1/4 are from Table 20. 500″ or 114. ELECTRICAL CONDUIT SUBMITTAL AND DATA SHEET SCHEDULE 40 AND SCHEDULE 80 CONDUIT, ANSI/UL 651. Sizes 1/ 2 " thru 6" per proposed revision to NEMA Engineering Bulletin No. May 7, 2025 ยท Four-inch RMC has an inside diameter of 4. 71, Aug. 1-1977. Fabricated from hot-dip galvanized steel inside and out, RMC is tough enough for use in outdoor applications, energy and manufacturing plants, and corrosive environments. 225″ or 5. . 4″ Intermediate Metal Conduit (IMC) is a lighter-weight version of RMC. MEETS OR EXCEEEDS THE REQUIREMENTS OF NEMA TC-2 RIGID NON-METALLIC CONDUIT FOR USE IN BOTH ABOVE GROUND AND UNDERGROUND INSTALLATIONS Rigid steel conduit, also known as heavy wall conduit, is a durable and reliable solution for electrical installations requiring robust protection. 026″ or 102. wmdwt suqeng conr qxcmvgz oiar mcqhea eqqtl jovpj swrsml yvqs