Question: what is the difference between imc and rigid conduit?
Answer: Rigid metal conduit (RMC) is the thickest-wall and heaviest-weight steel conduit. Intermediate Metal Conduit — IMC (ferrous metal). ... Intermediate metal conduit (IMC) has a thinner wall than RMC and weighs about one-third less. IMC has a thinner wall than RMC and weighs about one-third less than RMC.