Q - Why does the lightning protection system need to be connected to gas and water pipes? Doesn’t that pose a safety concern?
A - Common bonding connections are needed to eliminate safety concerns. Since lightning is traveling through the soil, it can be picked up on service lines in the ground, such as underground conduits, water pipes or gas lines, and feed a portion of the harmful current along these systems back into a structure. The lightning protection standards as well as the electrical code require all underground metallic piping systems (gas, water, electric, etc.) that enter the structure to be bonded together. The bonding does not introduce charges into your pipes, but rather brings all grounded systems to the same electrical potential as the lightning protection ground, thereby mitigating the risk of flashover during a lightning event.