UL-797 — Standard for Electrical Metallic Tubing — Steel

ANSI C80.3 — American National Standard for Steel Electrical Metallic Tubing

Rigid Metal Conduit — Steel (RMC)

UL-6 — Standard for Electrical Rigid Metal Conduit — Steel

ANSI C80.1 — American National Standard for Electrical Rigid Steel Conduit

Intermediate Metal Conduit — Steel (IMC)

UL-1242 — Standard for Electrical Intermediate Metal Conduit — Steel

ANSI C80.6 — American National Standard for Electrical Intermediate Metal Conduit

Additional information on the titles and designations of standards or requirements that have been used for the investigation of products in a specific category can be found in the UL Product IQ Guide information (https://iq.ulprospector.com/en). The UL product category for EMT is FJMX, for RMC is DYIX, and for IMC is DYBY.

The federal government, in an effort to reduce costs, has undertaken a process of identifying non government and industry-wide practices that have been accepted previously by the Department of Defense under the Single Process Initiative (SPI) for use in lieu of a specific military or federal specification or standard. This process reduces the burden on the government to produce and maintain separate standards. To this end, federal standards which covered steel rigid metal conduit, intermediate metal conduit and electrical metallic tubing, were cancelled and replaced as follows:

WW-C-581 Class 1 Type A; replaced with UL Standard for Electrical Rigid Metal Conduit — Steel, UL-6

WW-C-581 Class 2 Type A; replaced with UL Standard for Electrical Intermediate Metal Conduit — Steel, UL-1242

WW-C-563; replaced with UL Standard for Electrical Metallic Tubing — Steel, UL-797