~ National Lightning Safety Institute ~

Section 1.4.4

Presented at the International Lightning Detection Conference, Broomfield, Colorado, April 2-4, 2012

1. Introduction

This paper summarizes lightning safety as understood by the author summarizing 18 years experience in lightning hazard mitigation. Several fundamental statements apply:

• Absolute lightning safety is impossible.
• Lightning has its own agenda. Sometimes it ignores science maxims.
• Codes and standards are useful minimum guidelines for reducing consequential effects.

2. Risk Management

Risk management and mitigation of the lightning hazard requires:

2.1 People Safety

• Early Detection
• Notification
• Safe Shelter
• Re-evaluation of Threat
• Resumption of Activities
• Policies/Procedures
• Education/Training

2.2 Safety for Facilities and Structures

• Air Terminals
• Bonding
• Shielding
• Grounding/Earthing
• Surge Protection
• Maintenance
• Inspection/Testing

3. Conclusion

Application of the above 14 points to achieve lightning safety is recommended. Site specificity will necessitate more or less attention to each of these topics.

• Example: A radio tower is an air terminal — no more are required.
• Example: Concrete-encased electrodes far exceed the merits of ground rods — usually.
• Example: Hearing thunder is a first-class lightning detector.
• Example: Bonding is more important than grounding.
• Example: Without surge protection, all electrical and electronic assets are vulnerable.