If your home or business was built after 1990 or you had work done to your natural gas system, it's likely that corrugated stainless steel tubing (CSST) was installed.
If lightning strikes a structure containing CSST, there is a risk it can travel along the structure's natural gas piping system and cause a leak, or in some cases, even a fire.
CSST does not connect directly to appliances, but runs through a home or business, sometimes under floors, along sidewalls, or in the attic. It is a flexible, stainless steel pipe and often has a yellow, or sometimes black, casing.
CSST gas piping systems should be bonded to the electrical service grounding system at the point where the gas service enters the building. The bonding jumper should not be smaller than a 6 AWG copper wire or equivalent.
If you find CSST in your home or business, it is recommended that you contact a licensed electrician to make sure it is properly bonded and grounded. If you are unsure whether your building contains CSST, contact a building inspector for a professional inspection.