BSM White Electrical Conduit
Type 1: Electrical Metallic Tubing (EMT)
Thin wall, both ends are smooth.
According to American standards ANSI C80.3 and UL 797.
Type 2: Intermediate Metal Conduit (IMC)
Medium-thick wall, both ends are threaded.
According to American standards ANSI C80.6 and UL 1242.
Type 3: Rigid Steel Conduit (RSC)
Thick wall, connected by threads.
According to American standards ANSI C80.1 and UL 6.