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1000V arc + Natural Gas + O2 = KaBoom!

if memory serves, there's a fairly narrow ignition window re; gas/air ratio.....

part of the article in question.....
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The equipment grounding conductor for the circuit that may energize the piping shall be permitted to serve as the bonding means.

HB commentary......

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Section 250.104(B) was revised for the 2002 Code to state that gas piping is treated exactly the same as all "other metal piping" systems within a building.


so...is the confusion the EGC's possible inability to 'bond' an interior mettalic gas pipe which, thru the gas unit's structure isolated from said EGC ???
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