Here’s something else new in the 2009 IRC.
**“G2411.1.1. **[and 310.1.1 in the Fuel Gas Code]: CSST. Corrugated Stainless Steel Tubing (CSST) gas piping systems shall be bonded to the electrical service grounding electrode system at the point where the gas enters the building. The bonding jumper shall not be smaller than 6 AWG copper wire or equivalent.”
That’s now a code requirement, not just a recommendation from a few manufacturer’s of CSST involved in a past lawsuit.
**Here’s the impact: **An appliance connector **IS **classified as CSST. Therefore, just one appliance connector in a system using other materials (black iron, copper, etc.) for gas distribution will require the system to be bonded from the gas meter to the GEC or Service Entrance Panel ground bus.