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HEATING COST FUEL & BTU Cost Table
HEAT TAPE USAGE GUIDE
Hertz - Definitions of KHz MHz GHz THz
KNOB & TUBE WIRING
LIGHTING, EXTERIOR GUIDE
LIGHTING, INTERIOR GUIDE
LIGHTNING PROTECTION SYSTEMS
LOW VOLTAGE BUILDING WIRING
LOW VOLTAGE TRANSFORMER TEST
MAIN DISCONNECT AMPACITY
MOISTURE SOURCES in PANELS
MURRAY SIEMENS Recall
PHOTOVOLTAIC POWER SYSTEMS
PUSHMATIC - BULLDOG PANELS
REMOTE ELECTRIC POWER, PHOTOVOLTAIC
RUST in ELECTRICAL PANELS
SAFETY for ELECTRICAL INSPECTORS
SE CABLE SIZES vs AMPS
SIEMENS MURRAY Recall
THERMAL EXPANSION of HOT WATER
THERMAL EXPANSION of MATERIALS
UNDERGROUND SERVICE LATERALS
VOLTS / AMPS MEASUREMENT EQUIP
VOLTAGE MEASUREMENT METHODS
WIND ENERGY SYSTEMS
ZINSCO SYLVANIA ELECTRICAL PANELS
This lightning protection system 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. The photograph at page top was taken by the author from an aircraft.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.
We took these photographs of a damaged lightning protection system on an 1865 house in Orange County, New York. The air terminal and conductor were bent down away from the top of the home leaving the chimney and roof (a metal one in an area of frequent lightning strikes) unprotected.
This is an example of what can happen when someone who is not qualified works on the system. The lightning protection system for this home was dangerously compromised when the maintenance crew simply bent components down out of their way.
[The photographs of details of an old lightning protection system shown here were NOT the work of any of the companies or sources described at this website.]
To verify that an installer is Listed or to obtain further information call the Follow-Up Services Department at 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.
Example Lightning Protection System Installation Details for Outdoor Systems
Example Lighting Protection System Materials for Outdoor Installations
Example Hidden Lightning Protection System Installation Details
Example Hidden Lighting Protection System Materials
"The magnitude of the cloud-to-ground lightning hazard is understood better today than had been the case due in large part to data collected by the U.S. National Lightning Detection Network TM (NLDN) described by Holle and Lopez (1994) and Cummins et al. (1998). From 1992 to 1995, the NLDN identified an average of 21,746,000 cloud-to-ground flashes per year (Orville and Silver 1997).
Lightning occurs in the U.S. every day in summer, and nearly every day during the rest of the year. Since lightning strikes the ground in such large numbers and is so widespread, it is not possible to warn each person for every flash. For this reason, lightning can be considered the most dangerous weather hazard that many people encounter each year. Lightning-specific warnings have proven effective in some unique applications, such as at the Kennedy Space Center and during major golf tournaments."
"Although the scientific understanding of lightning has advanced significantly in the last few decades (Krider 1996), a consistent match between basic science and applications to safety had not been made. For example, NOAA (1992) said to squat on the balls of your feet and minimize contact with the ground, while NOAA (1985) recommended dropping to the knees during the lightning threat, and NOAA (1970) suggested dropping to the ground.
Concerning when to reach a safe location, NOAA (1992) recommended going to a safe location at the first sound of thunder, NOAA (1985) was not specific about when to go to a safe place, and NOAA (1970) made no mention of this decision process. Similar variations can be found in these and many other publications regarding additional issues such as medical and first aid approaches to lightning victims." -- Quotation - see Holle/Lopez.