Trade Size Max. external diamater Min. external diameter Max. thickness Min. thickness Length w/o coupling
½ IN. 0.820 IN. 0.810 IN. 0.085 IN. 0.070 IN. 9' -11/14"
¾ IN. 1.034 IN. 1.024 IN. 0.090 IN. 0.075 IN. 9' -11/14"
1 IN. 1.295 IN. 1.285 IN. 0.100 IN. 0.085 IN. 9' -11"
1-¼ IN. 1.645 IN. 1.63 IN. 0.105 IN. 0.085 IN. 9' -11"
1-½ IN. 1.890 IN. 1.875 IN. 0.110 IN. 0.090 IN. 9' -11"
2 IN. 2.367 IN. 2.352 IN. 0.115 IN. 0.095 IN. 9' -11"
2-½ IN. 2.867 IN. 2.847 IN. 0.160 IN. 0.140 IN. 9'10-½"
3 IN. 3.486 IN. 3.466 IN. 0.160 IN. 0.140 IN. 9' 10-½"
3-½ IN. 3.981 IN. 3.961 IN. 0.160 IN. 0.140 IN. 9' 10-¼"
4 IN. 4.476 IN. 4.456 IN. 0.160 IN. 0.140 IN. 9'10-¼"
Trade Size Max. external diamater Min. external diameter Max. thickness Min. thickness Length w/o coupling
16mm 20.83mm 20.57mm 2.16mm 1.79mm 3030mm
21mm 26.26mm 26.01mm 2.29mm 1.90mm 3030mm
27mm 32.89mm 32.64mm 2.54mm 2.16mm 3025mm
35mm 41.78mm 41.40mm 2.67mm 2.16mm 3025mm
41mm 48.01mm 47.72mm 2.79mm 2.29mm 3025mm
53mm 60.12mm 59.74mm 2.92mm 2.41mm 3025mm
63mm 72.82mm 72.31mm 4.06mm 3.56mm 3010mm
78mm 88.54mm 88.04mm 4.06mm 3.56mm 3010mm
91mm 101.12mm 100.61mm 4.06mm 3.56mm 3005mm
103mm 113.69mm 113.18mm 4.06mm 3.56mm 3005mm

Intermediate metal conduit, or IMC, is a rigid steel electrical conduit designed for outdoor exposure and strong connections. It was designed specifically to protect insulated electrical conductors and cables. It does the work of a similar metal conduit, rigid metal conduit (RMC), but weighs about a third less. By utilizing IMC in any areas allowed, you can all but eliminate the need for a heavier-walled conduit.

IMC conduit is coated with a hot galvanized coating on the exterior and a special corrosive-resistant coating on the inside to extend the conduit’s lifespan. Common conduit sizes range from 1/2 inch to 4 inches in diameter. It is sold in 10-foot lengths, with or without threaded ends

Intermediate Metallic Conduit

Manufactured under the UL standard

All IMC is UL 1242 certified, manufactured at ISO 9001-2015 certified facilities and meet all the technical requirements for electrical installations

 
 
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