(A) All telephone, telegraph and electric light or other transmission companies occupying the city and having thereon poles and wires, and guy wires for the support thereof, shall plainly mark all down guy wires with a board or boards not less than six inches in width, ranging from the surface of the ground to a height of five and one-half feet and parallel with said wire, and securely fastened thereto, or a metal shield.
(B) The board or boards shall be painted white and shall be maintained by the companies at all times in a condition that the same may be readily seen at night.
(`90 Code, § 19-67)