Historical
NEMA FB 1:2003
Fittings, cast metal boxes, and conduit bodies for conduit, electrical metallic tubing and cable
Covers fittings that are a part of electrical raceway systems designed for use as intended by the requirements of NFPA 70. Specifically covers fittings for use with non-flexible tubular raceways-;rigid and intermediate metal conduit and EMT. Adopted by the U.S. Department of Defense.
NEMA: National Electrical Manufacturers Association [nema]