How to properly ground an auxiliary gutter?

[SolarMan]

Most of the auxiliary wiring gutters I have seen installed do not have proper accommodations for grounding (e.g., ground bus bar kit paired with manufacturer-provided flared holes). How would one properly install an "off-the-shelf" ground bus bar in an auxiliary gutter? I would assume some sort of bonding apparatus (e.g., star washer) would need to be installed between the bus bar and the enclosure surface? Would there be a conventional torque spec to use for the mounting hardware?.. Or, if a bus bar may not be used, then how might the gutter be bonded/grounded otherwise?

 

[petersonra]

How about the same way that you bond any other metallic enclosure.

 

[tom baker]

Please see 250.8
Scrape paint off, use a 1 hole set screw lug, nut, bolt, star washer

 

[don_resqcapt19]

Not that it matters, but is it really an auxiliary gutter? Those are pretty rare.

 

[pv_n00b]

Not that it matters, but is it really an auxiliary gutter? Those are pretty rare.

There is a lot of confusion about what is an NEC 366 aux gutter and a 376 metal wireway. The descriptions seem to have a lot of overlap. If anyone can add their 2 cents I would be glad to hear it.

 

[don_resqcapt19]

There is a lot of confusion about what is an NEC 366 aux gutter and a 376 metal wireway. The descriptions seem to have a lot of overlap. If anyone can add their 2 cents I would be glad to hear it.

In general if the item in question is connected to the equipment via raceways, it is a wireway.

The auxiliary gutter must actually extend the wiring space of the equipment that it is attached to, and that is accomplished by a large opening in the gutter that mates up to a matching opening in the gear. Typically auxiliary gutters are supplied as an accessory to the gear by the gear manufacturer.