250.100 bonding in Hazardous loactions

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yeemartin

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Hi experts,

I have a waste water project that has a wet well with several submersible pumps and float switches that classified as a class I div 2 location. The inspector asked to bond all the metal parts in the wet well such as pump rails, wet well metal cover and even the HOSE BIB per 250.100.

In my opinion I think this is over kill, as these metal parts are not likely to be energized. All the submersible pumps and float switches have their own EGC and that EGC is internally factory bonded to the pump frame or float switch.

What is your opinion?
 
Overkill IMO.

I don't even see the connection between 250.100 and the items you listed. 250.100 specifies "non?current-carrying metal parts of equipment, raceways, and other enclosures". It additionally specifies the means of ensuring grounding contunuity per 250.92(B)(2 thru 4), which is essentially regarding raceway and metal sheath connections being made up tight.

All in all, 250.100 has nothing to do with running bonding jumpers to non-equipment, non-current-carrying metal parts.
 
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