44 (B) Above Roofs: Communications wires and cables must maintain a vertical clearance of at least 8 feet from all points of roofs they pass above, with exceptions for auxiliary buildings and certain roof slopes. These lines often share utility poles with higher-voltage electrical infrastructure, but their clearance requirements. Where practical, the communication system wires and cables on poles should be located below the electric light and power conductors [800. The climbing space. The basic minimum clearances are specified in Tables 1 and 2, Rules 37 and 38 respectively. Modifications are specified in the following provisions: A. This section sets forth safety and health standards that apply to the work conditions, practices, means, methods, operations, installations and processes performed at telecommunications centers and at telecommunications field installations, which are located outdoors or in building spaces used for. FIGURES. IV. Article 800, General Requirements for Communications Systems, sets the ground rules for the installation of these systems, and the five articles that follow dictate the requirements for specific types of systems, such as broadband communications systems. This article has undergone extensive changes.