Natural Gas Systems installed in new or remodeled construction after 1990 more than likely used Corrugated Stainless Steel Tubing (CSST). CSST is a flexible, stainless steel pipe. It is often yellow, but can sometimes have a black plastic coating.
If lightning strikes a home or business containing CSST, there is risk it may travel along the structure’s natural gas line and cause a leak or even a fire.
CSST generally runs under floors, along sidewalks and in the attic, but does not connect directly with appliances.
CSST gas piping systems need to be bond to the electrical service grounding electrode system at the point where the gas service enters a home or business. A bonding jumper no smaller than 6 AWG copper wire or equivalent should be used.
If you are unsure if your home or business contains CSST, contact a building inspector to obtain a professional inspection. If you find CSST after inspecting your home or business, Fremont Department of Utilities recommends you contact a licensed electrician to make sure it’s bonded and grounded properly.