re: Electrician Help: Direct burial wire size from house panel to feed shed 60A sub panel

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2224 should be enough for a 100A subpanel, but I’m not an electrician. Don’t forget a ground rod at the subpanel, separate the neutrals and grounds, and a disconnect if it’s a detached building.

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Installing a ground rod at the subpanel could be more complicated. If that is done, you typically dont want to run a ground from the main panel. you'd just run 2 hots and a neutral. Then you'd need to do a neutral-ground bond at the sub-panel and have that ground-rod bonded to the ground bus in the sub panel.

If you run the ground from the main panel to the sub-panel, you dont need the ground rod and you dont do another neutral-ground bond. Both ways are acceptable.