Home Separate Addition (ADU) Grounding and Bonding

[Electriman]

Greetings,

When we power an ADU which is separated from the main building, per NEC code do we need to have a new grounding electrode next to the ADU and bond the rebars and water metal pipes per NEC if we use the existing service but we put a new subpanel in the ADU?

Thanks for feedback.

 

[tom baker]

Yes separate buildings require a GES for a feeder. Neutrals and EGC are landed on separate terminals

 

[wwhitney]

In case "Home Separate Addition" refers to an attached addition, just with a separate entrance, then the subpanel would be treated just like any other subpanel.

Cheers, Wayne

 

[LarryFine]

If it's in a detached building, electrodes are required.

If it's close enough, the main building's electrodes may be shared.

 

[Electriman]

Thanks