W-C-575B, FEDERAL SPECIFICATION: CONDUIT & FITTINGS, NONMETALLIC, RIGID, BITUMINIZED FIBER, LAMINATED WALL (15-JAN-1981)

W-C-575B, FEDERAL SPECIFICATION: CONDUIT & FITTINGS, NONMETALLIC, RIGID, BITUMINIZED FIBER, LAMINATED WALL (15-JAN-1981)., This specification covers conduit of bituminized fiber with laminated wall, and fittings of equivalent material, for use in the installation of electrical wires and cables.