200a combo to Sub panel grounding question

[Vwsc1959]

Hi I currently have 2 meters from 1 overhead drop on my house. 1 meter goes straight into a 150 amp main panel for the house. The other meter has a 100 amp breaker next to it that goes 100 foot in PVC conduit to a detached garage sub panel without a main breaker.

I added another detached garage behind it so I plan on removing the current garage meter can and install a 200a meter main combo with a 200a main breaker with 8 spaces for the 100a existing garage sup panel then use the feed thru lugs for a new 200a main panel in the new garage that’s 140 feet away.

I plan on using 3- 3/0 wires in 2 1/2” pvc. My question has to do with the grounding. Should I use 4ga solid bare from the meter main combo to 2 grounding rods spaced 6’ apart. And then tie my house meter ground to one of those rods?

Should I run 6 gauge stranded through the PVC to the new 200a panel and then I have to run a 4 ga bare from that ground bar to a rod by the new garage or do I need 2 rods spaced 6’ apart back there also? Should I run a ground from the ground bar to a steel column for good luck? The panel is mounted to strut bar I welded to a column.

Then the neutral and ground only connect in the meter/main combo. Separate neutral and ground bars in the new 200a panel in the garage.

thanks

 

[Dennis Alwon]

I am closing this thread, in accordance with the Forum rules. This Forum is intended to assist professional electricians, inspectors, engineers, and other members of the electrical industry in the performance of their job-related tasks. However, if you are not an electrician or an electrical contractor, then we are not permitted to help you perform your own electrical installation work.


If I have misjudged the situation, if for example this project is related to your work, then send me a Private Message. If you can show me that I am wrong, and that you are a licensed electrician (or at least a licensed apprentice), then I will reopen your post, and offer an apology for the delay and inconvenience.

A reminder to all members, if you see a questionable post, feel free to report it by clicking the

button at the bottom left corner of the post.