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This website describes common lightning protection systems, certification, installation, and lightning protection system inspection.

We provide information about lightning strikes, lightning hazards, related equipment, sources of lightning protection system installers, and lightning strike risk assessment © Copyright 2008 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left.

Lightning Protection System Certification

Lightning protection systems are examined and certified by Underwriters Laboratories, Inc. Be sure your installer is listed by UL and that a Master Label application is submitted to UL for your installation.

There are other listing and certifying agencies as well, including the Lightning Protection Institute (LPI) and the National Fire Protection Association (NFPA).

Verify that your Lightning Protection System Installer is LPI-certified and your Lightning Protection System Components are UL-Listed

The Lightning Protection Institute certifies Journeyman and Master Installers and Professional Design/Inspectors for lightning protection systems. These professionals pass a series of tests and are re-tested annually. LPI-certified professionals are provided with an identification card, or you can contact the LPI to ask about someone's credentials by calling the Lightning Protection Institute at 800-488-6864.

Underwriters Laboratory, UL To verify that a lightning protection system or component is is UL-Listed or to obtain further information call the Follow-Up Services Department at the Underwriters Laboratory, UL, 1285 Walt Whitman Road, Melville, NY 11747 516/271-6200.

UL has other offices in Northbrook, IL, Santa Clara, CA, and Research Triangle Park, NC.

Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.

Lightning Protection Systems
What is Lightning?
Lightning Protection Systems
How do Lightning Systems Work?
Damaged, Unsafe Lightning Systems
Lightning Protection Certification
Outdoor Lightning Protection Design
Lightning Protection for Trees
Hidden Lightning Protection Design
Lightning Strike Risk Assessment
How to Avoid Being Struck by Lightning
Lightning Strikes Small Boat

Technical Reviewers

Particular thanks are due to experts and also consumers who read these articles and suggest corrections, changes, and additions to the material. Content suggestions, technical corrections and content critique are invited for any of the content at our website.

• Daniel Friedman - principal author
• Portions of this information are based on UL publication 200-81 11/87 and other local service company information about lightning protection systems and lightning strike hazards.
• Special thanks to Associated Lightning Rod Company, Cooper Road Box 329A, Millerton NY who has been contributing technical content in presentations to NY ASHI home inspectors since 1996. Some of that information [on lightning system material and installation details] was edited for clarity. ALRCi can be reached at 518-789-4603, 845-373-8309, 860-364-1498 and will inspect your lightning protection system at no charge. [We have no financial nor any other business relationship with any company or product discussed at this website--DF]
• For more details on how lightning protection systems work, see Lightning Protection from Pacific Electric and Gas Company, and Electrical System Grounding and Lightning Protection, Engineering Technical Letter 90-6, Department of the Air Force, HQ USAF.
• Lightning strike risk assessment: for the full body of this excellent article which summarizes recent opinions about lightning strike risk assessment and safe practices for individuals or groups needing to avoid being struck by lightning, see Updated Recommendations for Lightning Safety - 1998 Ronald L. Holle and Raul E. Lopez from National Severe Storms Laboratory, NOAA and Norman, Oklahoma, Christoph Zimmermann Global Atmospherics, Inc. Tucson, Arizona
• As we indicated in an original version of this article, a lightning strike risk assessment guide can be found in Appendix I of the National Fire Protection Association's Lightning Protection Code, NFPA #780. The guide considers type of structure, type of construction, structure location, topography, occupancy, contents and lightning frequency. Contact NFPA, Batterymarch Park, Quincy, MA 02269 617-770-3000.
• Lightning Protection Institute, 3365 N. Arlington Heights Rd., Suite J., Arlington Heights IL 60004
• Underwriters Laboratory Standard UL96A. These requirements cover the installation of lightning protection systems on all types of structures other than structures used for the production, handling, or storage of ammunition, explosives, flammable liquids or gases, and other explosive ingredients including dust. These requirements apply to lightning protection systems that are complete and cover all parts of a structure. Partial systems are not covered by this standard. These requirements do not cover the installation of lightning protection systems for electrical generating, distribution, or transmission systems. These requirements do not cover lightning protection components, which are covered by the Standard for Lightning Protection Components, UL 96.
• Underwriters Laboratory Standard UL96: These requirements cover lightning protection components for use in the installation of complete systems of lightning protection on buildings and structures. These requirements do not cover the installation of lightning protection components. Products of this type are covered by the Standard for Installation Requirements for Lightning Protection Systems, UL 96A.
• Critique, contributions wanted: Contact Us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.

More Information on Lightning Protection Systems & Building Inspections, Diagnosis, & Repair

• Armor Lightning Protection Inc Manchester Center, VT, 802-375-0266 state-of-the-art lightning protection and surge protection for residential and commercial buildings in Vermont, New England, and throughout the Northeast
• Associated Lightning Rod Company, Inc., Box 329A, Cooper Road, Millerton, NY 12546 914/373-8309 518/789-4603
• A-C Lightning Security, Inc., 2100 East First St., PO Box 329, Maryville MO 64468 816-582-8115 800-821-5575 816-562-2932. In New York, Hudson Valley, contact Christensen Electrical Power Systems, Richard G. Christensen, 518-537-4128.
• Lightning Eliminators & Consultants 6687 Arapahoe Road Boulder, CO 80303 (303) 447-2828. "Engineering Solutions For Lightning, Grounding and Surge Protection Worldwide Since 1971"
• Electrical EINET
• Lightning Protection for Facilities, Dr. Bruce Gabrielson, Robert B. Marcus, Published and presented: EMCEXPO92, Washington D.C.
• MIT's Electrical Safety Files
• Newton's International Electrical Journal
• Lightning Protection for Workers What to Do if You're Outside in a Lightning Storm - Center to Protect Workers' Rights (PDF)
• 1998 and Current Lightning Protection Conferences & Exhibitions
• Lightning Risk and Hazard Analysis Measurement from the National Lightning Safety Institute (NLSI).
• "Lightning Fatalities, Injuries, and Damage Reports in the United States from 1959-1994", E. Brian Curran, Ronald L. Holle, Raul E. Lopez, NOAA Technical Memorandum NWS SR-193 October 1997
• UL - Underwriters Labs Lightning equipment certification program. "Underwriters Laboratories Inc. (UL) has been testing and certifying lightning protection equipment since 1908. UL issues certificates of conformance for systems, inspecting system components and checking completed installations. Installations are required to comply with UL's internationally recognized Standards for lightning protection systems. Manufacturers, suppliers and installers demonstrate their commitment to safety by building, selling and installing only those lightning protection products that pass UL's rigorous testing." -- (Op.Cit.)



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