Where aluminum and other metal siding is used on the exterior of a building or other structure, the siding must be securely grounded in the following manner.
(a) Apply one inch wide bare conductors of the same alloy and the same gauge or greater, then the veneer panels. Bond all conductors together.
(b) Fasten the ground wire to a lower conductor, then securely fasten to the common grounding system of the structure. If none is available, the ground wire shall be fastened to an approved ground rod of not less than five-eighths inch diameter and eight feet long extending eight inches above ground and may need to be through the siding. Underwriters’ Laboratories, Inc. approved fittings are required. Use number 8 aluminum ground wire or larger. Where ground rods are used, there shall be a ground rod on the opposite sides of the building. As panels are applied to the wall, fasten overlapping conductors with a one and one-fourth inch aluminum or bimetal sheet metal screw at all points.
(c) Use a sufficient number of conductors in all vertical and horizontal panel areas to provide adequate bonding. Grounding must be inspected before siding is applied.
(Ord. 73-O-41, passed 8-7-1973)