Ground bushing

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GTERojas

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On a 250V and above is a ground bushing required on a reducing washers in a 1? knock out I am reducing to ? so 1? to ? ? Please state the NEC where I can reference to it
 

iwire

Moderator
Staff member
Location
Massachusetts
If all the concentrics have been removed and if you clean any paint off as required by 250.12 you are not NEC required to use a bonding bushing.

UL lists reducing washers as suitable for grounding.

That said, I would at least pull a green in with the circuit and if that could not happen I would install a bonding bushing ........ but that is just a personal choice.
 
If all the concentrics have been removed and if you clean any paint off as required by 250.12 you are not NEC required to use a bonding bushing.

UL lists reducing washers as suitable for grounding.

That said, I would at least pull a green in with the circuit and if that could not happen I would install a bonding bushing ........ but that is just a personal choice.


This is the part of the equation that I see most guys are either unaware of, or just do not perform as part of the installation.
 
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