[250.62]. Copper, aluminum, or copper-clad
[250.64(A)]. Where in direct contact with masonry
or the earth or in corrosive conditions. Don't terminate it within
18 inches of the earth.
[250.64(B)]. It must be "securely fastened to"
[250.64(C)]. Not normally, but yes if you meet
one of two conditions specified in 250.64(C).
[250.64(D(3))]. The grounded conductor (of each
enclosure) and the grounding electrode system.