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NFPA 780: Standard for the Installation of Lightning Protection Systems, 2017 Edition

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Major changes in the 2017 edition of NFPA 780 provide greater oversight and new understanding of lightning protection systems and lightning hazards.

Reflecting the latest protection methods, devices, and safety challenges, the 2017 edition of NFPA 780: Standard for the Installation of Lightning Protection Systems is the new industry benchmark for protecting lives and property from fire and related dangers associated with lightning events.

Determine the right protection scheme for different occupancies.

Lightning hazards exist everywhere, but depending on the use of a building or structure, different lightning protection protocols exist. This edition of NFPA 780 helps you recognize hazards and provide appropriate protection.

  • Updated Section 5.3 pertaining to facilities that handle or process combustible or explosive dust now presents specific references to NFPA® standards addressing dust hazards, including NFPA 61: Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities, NFPA 122: Standard for Fire Prevention and Control in Metal/Nonmetal Mining and Metal Mineral Processing Facilities, and NFPA 664: Standard for the Prevention of Fires and Explosions in Wood Processing and Woodworking Facilities.
  • Rewritten Chapter 7 addresses protection for structures containing flammable vapors, flammable gases, or liquids that can give off flammable vapors.
  • New definitions include ground loop conductor, integral lightning protection system, mast-type lightning protection system, rated impulse withstand voltage level (withstand voltage) (u w), smart structure, solar array, and solar panel.

Other changes assist facility managers, installers, inspectors, and AHJs:

  • Added requirements in this edition -- concerning physical on-site inspections of completed installations and periodic inspections or testing -- may be required at the discretion of the AHJ.
  • Updated figures illustrate air terminal protection for lower roof protection.
  • New requirements cover test and connection points for concrete-encased electrodes to enable periodic maintenance and testing of the ground system.
  • New bonding requirements address long horizontal metal bodies on roofs.
  • Numerous new requirements pertain to ungrounded metal bodies.
  • This edition includes re-evaluated and revised zero property line conditions.
  • New Annexes cover technologies used in state-of-the-art systems: Annex J, Protection of Smart Structures; and Annex K, Guide to International Standards Dealing with the Selection of SPDs for Use on Photovoltaic (PV) Installations.

Make sure youre prepared to reduce lightning risks. Trust your jobs to the 2017 NFPA 780. (Softbound, 112 pp., 2017)

NFPA® 780 Standard for the Installation of Lightning Protection Systems, 2017 Edition

Chapter 1 Administration
1.1 Scope. 
1.2 Purpose. 
1.3 Listed, Labeled, or Approved Components. 
1.4 Retroactivity. 
1.5 Mechanical Execution of Work. 
1.6 Maintenance. 
1.7 Units of Measurement.
Chapter 2 Referenced Publications
2.1 General. 
2.2 NFPA Publications. 
2.3 Other Publications. 
2.4 References for Extracts in Mandatory Sections.
Chapter 3 Definitions
3.1 General. 
3.2 NFPA Official Definitions. 
3.3 General Definitions.
Chapter 4 General Requirements
4.1 General. 
4.2 Materials. 
4.3 Corrosion Protection. 
4.4 Mechanical Damage or Displacement. 
4.5 Use of Aluminum. 
4.6 Strike Termination Devices. 
4.7 Strike Termination Devices on Roofs. 
4.8 Zones of Protection. 
4.9 Conductors. 
4.10 Conductor Fasteners. 
4.11 Masonry Anchors. 
4.12 Connector Fittings. 
4.13 Grounding Electrodes. 
4.14 Common Bonding of Grounded Systems. 
4.15 Potential Equalization. 
4.16 Bonding of Metal Bodies. 
4.17 Metal Antenna Masts and Supports. 
4.18 Concealed Systems. 
4.19 Structural Metallic Systems. 
4.20 Surge Protection.
Chapter 5 Protection for Miscellaneous Structures and Special Occupancies
5.1 General. 
5.2 Masts, Spires, Flagpoles. 
5.3 Facilities That Handle or Process Combustible or Explosive Dust. 
5.4 Metal Towers and Tanks. 
5.5 Air-Inflated Structures. 
5.6 Concrete Tanks and Silos. 
5.7 Guyed Structures. 
5.8 Roof Top Helipads. 
5.9 Fabric Structures.
Chapter 6 Protection for Heavy-Duty Stacks
6.1 General. 
6.2 Materials. 
6.3 Strike Termination Devices. 
6.4 Conductors. 
6.5 Fasteners. 
6.6 Splices. 
6.7 Reinforced Concrete Stacks. 
6.8 Bonding of Metal Bodies. 
6.9 Grounding. 
6.10 Metal Stacks. 
6.11 Metal Guy Wires and Cables.
Chapter 7 Protection for Structures Containing Flammable Vapors, Flammable Gases, or Liquids That Can Give Off Flammable Vapors
7.1 Applicability. 
7.2 Principles of Protection. 
7.3 Protective Measures. 
7.4 Protection of Specific Classes of Structures.
Chapter 8 Protection of Structures Housing Explosive Materials
8.1 Application. 
8.2 General. 
8.3 Types of Lightning Protection. 
8.4 Grounding. 
8.5 Bonding. 
8.6 Surge Protection. 
8.7 Protection for Specific Facilities. 
8.8 Metallic Fences. 
8.9 Maintenance and Inspection. 
8.10 Inspection, Testing, and Maintenance.
Chapter 9 Protection for Wind Turbines
9.1 General. 
9.2 Fundamental Principles of Protection. 
9.3 Protection of Electrical and Mechanical Control Systems. 
9.4 Grounding.
Chapter 10 Protection for Watercraft
10.1 General. 
10.2 Materials. 
10.3 Strike Termination. 
10.4 Conductors. 
10.5 Grounding.
Chapter 11 Protection for Airfield Lighting Circuits
11.1 General. 
11.2 Application. 
11.3 Purpose. 
11.4 Airfield Lighting Counterpoise System.
Chapter 12 Protection for Solar Arrays
12.1 General. 
12.2 Fundamental Principles of Protection. 
12.3 Strike Termination Devices. 
12.4 Protection of Electrical and Mechanical Systems. 
12.5 Grounding.
Annex A Explanatory Material 
Annex B Principles of Lightning Protection 
Annex C Explanation of Bonding Principles 
Annex D Inspection and Maintenance of Lightning Protection Systems 
Annex E Ground Measurement Techniques 
Annex F Protection for Trees 
Annex G Protection for Picnic Grounds, Playgrounds, Ball Parks, and Other Open Places 
Annex H Protection for Livestock in Fields 
Annex I Protection for Parked Aircraft 
Annex J Protection of Smart Structures 
Annex K Guide to International Standards Dealing with the Selection of SPDs for Use on Photovoltaic (PV) Installations 
Annex L Lightning Risk Assessment 
Annex M Guide for Personal Safety from Lightning 
Annex N Reserved 
Annex O Informational References
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