Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 39 - SAFETY STANDARDS-GENERAL
Subchapter B - ELECTRIC SAFETY
LIGHTING FIXTURES AND SIGNS
Section 39.274 - Accessibility and guarding of signs

(a) Electric signs at an elevation greater than 30 feet above roadways or footways, or at an elevation above a roof greater than the distance from the edge of the roof shall, if they require attendance while in position, be provided with substantial, safely accessible runways, ladders or platforms from which all replacements and other necessary adjustments may be made. Provision for supporting workmen by safety belts should be made in the construction and installation of signs so located.

(b) Electric signs outside buildings shall have no ungrounded current-carrying parts normally exposed to contact of workmen on or in the building. Reference should also be made to § 39.214(b) (relating to guarding conductors).

(c) The exposed noncurrent-carrying metal parts of a sign should be grounded if within reach of any grounded surfaces, including metal work of the building structure.