Best Answer: the rate of diffusion is directly proportional to the concentration gradient. The greater the difference in concentration between two areas, the greater the rate of diffusion.
EPC-40: Electrical Plastic Conduit : Designed for normal duty application. EPC-80: Electrical Plastic Conduit : Designed for heavy duty application.
Intermediate metal conduit (IMC) is a circular metal raceway with an outside diameter equal to that of rigid metal conduit (RMC). The wall thickness of IMC is less than that of RMC, so it has more interior room for conductors.