All electric signs shall conform to the standards of the National Electrical Code and of the Underwriters' Laboratories, Inc. The full number of illuminating elements thereof shall be kept in safe and working condition or immediately repaired or replaced, if faulty. Signs that are only partially illuminated shall meet all electrical requirements for that portion directly illuminated. All electric signs shall have a disconnect switch located in accordance with the provisions of the Building Code.
(1952 Code § 43-4-4)