Generator ground rod

[wdan432]

Do I need ground rod for air cooled Generac generator and if not what code article tells us this. Is this a seperatly derived system?

 

[Dennis Alwon]

If you switch the neutral from the service thru the transfer switch then the generator would be a sds.

 

[augie47]

By direct NEC Article, Dennis is correct. If the generator is a SDS, a Code required grounding electrode system is needed.
Generac Corp. in their instructions requires a ground rod, in all cases, I believe, and NEC 110.3(B) would apply.

 

[wirebender]

From a Generac installation manual.


6. Connect an approved ground strap to the grounding lug on the
base frame and to an approved earth ground or grounding rod
as specified by local regulations.

 

[shortcircuit2]

From a Generac installation manual.


6. Connect an approved ground strap to the grounding lug on the
base frame and to an approved earth ground or grounding rod
as specified by local regulations.

The key wording above is "as specified by local regulations"

There are no local regulations in my area that require a ground rod and the NEC only requires a GES if it is set up as an SDS.

Installing a ground rod for a generator that is NOT set up as an SDS is supplemental.

 

[infinity]

From a Generac installation manual.


6. Connect an approved ground strap to the grounding lug on the
base frame and to an approved earth ground or grounding rod
as specified by local regulations.

Would the building grounding eletrode system be an approved earth ground? I'm not reading this as a requirment to use a ground rod.

 

[wirebender]

Would the building grounding eletrode system be an approved earth ground? I'm not reading this as a requirment to use a ground rod.

I don't either. I never drive one.