250.96 Bonding Other Enclosures.
(A) General. Metal raceways, cable trays, cable armor,
cable sheath, enclosures, frames, fittings, and other metal
non?current-carrying parts that are to serve as equipment
grounding conductors, with or without the use of supple-
mentary equipment grounding conductors, shall be bonded
where necessary to ensure electrical continuity and the ca-
pacity to conduct safely any fault current likely to be im-
posed on them. Any nonconductive paint, enamel, or simi-
lar coating shall be removed at threads, contact points, and
contact surfaces or be connected by means of fittings de-
signed so as to make such removal unnecessary.