Gas & FuelQuestion 64 of 110
Corrugated stainless steel tubing (CSST) must be electrically bonded to reduce the risk of arcing from a lightning-induced surge. Where is the bonding clamp attached?
a.To the CSST jacket only
b.To the appliance cabinet only
c.To the gas meter body only
d.To a rigid pipe or CSST fitting ahead of the first downstream CSST, bonded to the grounding electrode system
Explanation
CSST is bonded by clamping to a rigid gas pipe component or approved fitting and connecting to the building grounding electrode system, typically with a minimum 6 AWG copper conductor. Bonding drains induced energy so a lightning surge does not perforate the thin CSST wall by arcing. Standard equipment grounding alone does not satisfy the dedicated CSST bonding requirement.
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