NEMA FB 1

Description / Abstract: This Standards Publication covers fittings that are a part of electrical raceway systems designed for use as intended by the requirements of the National Electrical Code®, NFPA 70. Specifically, this standard covers fittings for use with non-flexible tubular raceways—Rigid and Intermediate Metal Conduit, Electrical Metallic Tubing. Also included are fittings for use with flexible conduit and cable raceways including- Flexible Metal Conduit, Armored Cable, Metal Clad Cable, Tray Cable, Mineral Insulated Cable, Flexible Cord, Nonmetallic Sheathed Cable, and Service Entrance Cable. The Family Tree of the Conduit Fittings Industry is provided for reference in Appendix A.

This standard also includes: cast metal Outlet Boxes and Conduit Bodies and covers, that, when designed for the purpose, serve as a box intended to house conductor splices and/or wiring devices; and cast metal Junction Boxes, Pull Boxes and covers.

This standard does not include standard conduit couplings of the type provided with lengths of Rigid and Intermediate Metal Conduit, or threaded conduit nipples, or threaded or unthreaded factory made bends derived from Rigid and Intermediate Metal Conduit or Electrical Metallic Tubing.

This standard does not apply to fittings, boxes or enclosures that are for use in Class I, Division 1; Class II, Division 1; Class III, Division 1; Class I, Zones 0, 1, or 2; Class II, Zones 20, 21, or 22 Exceptions are those ordinary location fittings and enclosures which are specifically permitted by the National Electrical Code® in these locations.