Ufer grounding

[Hye tech]

We upgrade 200amp main meter panel box in California Los Angeles.
There was existing Ufer grounding system present that’s what we used for my new 200 amp panel.
My question is?is it require for me to bring an additional ground wire from the mine water pipe?
Or existing ufer ground it’s enough for this job?

 

[LarryFine]

Welcome to the forum.

The Ufer ground eliminates the need for additional made electrodes (rods, etc.), but a metallic water-piping system must still be bonded, and other existing qualifying electrodes must be bonded.

If I'm not mistaken.

 

[infinity]

To expand on Larry's comment if the water pipe qualifies as an electrode it must be used as part of the GES. If it is not an electrode but there is a complete metallic water piping system then it must be bonded.

 

[Fred B]

To expand on Larry's comment if the water pipe qualifies as an electrode it must be used as part of the GES. If it is not an electrode but there is a complete metallic water piping system then it must be bonded.

I also believe this distinction would change the wire size needed in connecting to the water pipe.

 

[infinity]

I also believe this distinction would change the wire size needed in connecting to the water pipe.

GEC's aren't required to be larger than #3/0. Bonding jumpers can be required to be larger.