NFPA 780 Standard for the Installation of Lightning Protection Systems
NFPA 780 避雷系统安装标准
1.1 Scope.
1.1.1 This document shall cover traditional lightning protection system installation requirements for the following
(1) Ordinary structures
(2) Miscellaneous structures and special occupancies
(3) Heavy-duty stacks
(4) Watercraft
(5) Structures containing flammable vapors, flammable gases, or liquids that give off flammable vapors
1.1.2* This document shall not cover lightning protection system installation requirements for the following
(1) Explosives manufacturing buildings and magazines
(2) Electric generating, transmission, and distribution systems
1.1.3 This document shall not cover lightning protection system installation requirements for early streamer emission systems or charge dissipation systems.
A.1.1.2 Electric generating facilities whose primary purpose is to generate electric power are excluded from this standard with regard to generation, transmission, and distribution of power. Most electrical utilities have standards covering the protection of their facilities and equipment. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard. Lightning protection systems for structures used for production or storage of explosive materials require special consideration because the contents of such structures are sensitive to arc or spark ignition. Annex K provides guidance for protection of structures housing explosive materials. Other standards and handbooks that provide guidance for military applications are found in Annex O.
A broader scope and technical changes in 2011 NFPA 780 reduce risks from lightning exposure.
Follow the latest lighting exposure safeguards in the 2011 NFPA 780 Standard for the Installation of Lightning Protection Systems. Major additions and technical revisions in this edition make it a "must" for everyone responsible for reducing hazards associated with lightning--from designers and to installers, to insurance professionals and AHJs.
Improve safety with vital updates, including
· A new chapter on protection for wind turbines
· A new chapter for lightning protection of structures housing ammunition and explosive materials
· A new section on rooftop helipads
· Clarified requirements for strike termination devices at the eaves for a pitched roof
· Revised lightning risk assessment methodology (Annex L) now provides both a simplified, quick-look assessment and a more detailed assessment for those requiring in-depth analysis.
Protect people and property from fire risk and related hazards associated with lightning strikes. Work with the current guidelines in NFPA 780. (Softbound, 71 pp., 2011)