Mich. Admin. Code R. 408.30528a
Rule 528a.
Section G2411.1.1 (310.1.1) of the code is amended to read as follows: G2411.1.1. CSST. Corrugated stainless steel tubing (CSST) gas piping systems shall be bonded to the electrical service grounding electrode system or where provided, lightening protection electrode system. The bonding jumper shall connect to a metallic pipe, pipe fitting, or CSST fitting between the point of delivery and the CSST utilizing a device listed for the application. The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent, not longer than 75 feet and accessible. Gas piping systems that are bonded in accordance with this section shall be considered effectively bonded regardless of the amount of CSST in the system. Any additional grounding electrodes used shall be bonded to the electrical service grounding electrode system, or where provided, the lighting protection grounding electrode system.
Exception: CSST piping systems tested and listed by the manufacturer for installation without additional bonding when installed in accordance with the listing.
Mich. Admin. Code R. 408.30528a