(A) Lightning arrester. A lightning arrester shall be installed in each conductor of a lead-in from an outdoor antenna. The lightning arrester shall be grounded to an approved ground no lighter than #6. The lightning arrester shall not be located neat any combustible material or in a hazardous location. All supporting poles or masts shall be permanently grounded in the same manner, except that poles or masts which are themselves used as antennas need not be so grounded.
(B) Supports. Outdoor antenna and counter poise and lead-in conductors shall be securely supported. They shall not be attached to poles or similar structures carrying electric light or power wires. Insulators supporting the antenna or counterpoise conductors shall have sufficient mechanical strength to safely support the conductors. Lead-in conductors shall be securely attached to the antenna.
(C) Lead-in conductors. Lead-in conductors attached to buildings shall be installed so that they cannot swing closer than two feet to the conductors of circuits of 250 volts or less, or closer than ten feet to conductors of circuits of more than 250 volts. The clearance between lead in conductors and any conductor forming part of a lightning rod system shall not be less than six feet. Lead in shall be supported at intervals not less than 15 feet apart.
(D) Chimney mounts. Chimney mounts on single flue chimneys with less than three square feet of cross sectional area must be made with straps completely around the chimney. Antennas may be mounted with anchors on chimney of a size greater than three square feet of cross-sectional area provided that such chimney is in good condition. Anchors are to be set in holes frilled in the brick and the anchor shall not be set in the mortar joint between the brick.
(E) Pipe mast guys. All pipes masts requiring guys shall be guyed by not less than three and preferably four guys evenly spaced. Guy wires shall be of non-corrosive, stranded cable or wire, and shall be of 300-pound test strength. All guys shall be made mechanically secure to the roof, parapet or other masonry. They shall be attached to the mat with guy rings and contain turnbuckles installed at the base end. The guys shall not be installed at an angle of less than 30 degrees to the vertical of the mast. The guys shall not be tightened in such a manner as to cause the mast to buckle.
(F) Pipe mast heights. Pipe masts over eight feet in height exclusive of the beam elements shall be guyed as set forth in division (E) above.
(1) Pipe masts over eight feet in height but not greater than 20 feet in height exclusive of beam elements shall be guyed to a minimum of two positions. The lower position is to be not less than five feet or more than eight feet from the base. The higher position is to be set not less than two feet from the top. These masts are to be guyed as set forth in division (E) above.
(2) Pipe masts of over 20 feet in height, exclusive of antenna elements, shall be guyed in several positions. The lowest position shall be guyed not less than five feet or more than eight feet from the base. Subsequent guys shall be installed at intervals of eight to ten feet above the first set of guys. The guys shall be installed as set forth in division (E) above.
(G) Wood poles. Wood poles that are 40 feet in height must be set at least six feet in the ground, and poles 40 to 50 feet in height must be set not less than seven feet or more than eight feet in the ground.
(H) Power lines. If possible, all masts and towers shall be installed that the mast and antenna cannot fall on power lines carrying 250 volts or more in the event of the failure of the masts or guys. Where the installation could fall on a power line, the installation shall not be made until approval has been obtained from the Ottertail Power Company.
(I) Installations. All installations shall be made in a neat, safe and workmanlike manner.
(2009 Code, § 509.02) Penalty, see § 10.99