Lightning is another weather phenomenon associated with thunderstorms. A lightning flash is a high-voltage, electrostatic discharge that can cause physical damage to property by the high-energy strike itself, ensuing fire or induced surge transmitted through an electrical system.
A surge can damage electrical insulations, affect data or cause unwanted process actions. Any region of the world can be affected by lightning; however, the highest flash frequencies occurs from the equator through the northern and southern mid-latitudes.
|Tall, isolated structures on elevated ground.||Building surrounded by buildings or trees of similar or greater height.|
|Buildings with a history of lightning strikes, or high frequency.||Buildings with low hazard occupancies.|
|Locations storing hazardous materials such as flammable or combustible liquids and gases.||Buildings with electrical, control, data and communication equipment that has low value or adequate specialised protection.|
|Locations with high-valued or sensitive electrical, process control, data processing or telecommunication systems.|
- Where recognised, apply IEC 62305 “Protection Against Lightning”. Conduct a risk assessment per Part 2 and as appropriate a compliant lightning protection system for the building per Part 3 and protection of electronic systems within the building per Part 4.
- Where recognised, apply applicable national codes or NFPA 70 “National Electrical Code” and NFPA 780 “Standard for the Installation of Lightning Protection Systems”. Conduct a risk assessment per NFPA 780 Annex H. Where appropriate, provide a complete UL listed Master Label lightning protection system to protect the building. Provide surge protection in accordance with NFPA 70.