10:32AM | 06/08/07
Member Since: 06/07/07
2 lifetime posts
- I want to put a sub panel in my shed.

- 2 circuits: 15 amp lights (450 watts total), 20 amp outlets (ocasional power tool, raidio, weed wacker, pancake air compressor, etc.)

- distance from main panel to sub is 90 feet.

- feeder will run through the house, then about 30 through the ground(UF).

- using two pole 30 amp breaker at main panel.

- using 15 amp 120v on one side of the feed. 20 amp 120v on the other.

- What gauge should I use for the feeder?? (will 10/3 do?)

- What gauge for the subpanel ground??


04:20AM | 06/09/07
Member Since: 04/25/05
1915 lifetime posts
#10 UF would be fine for your use.

Tom O

05:05AM | 06/09/07
Member Since: 09/17/02
477 lifetime posts
As long as there are no other metallic pathways that require bonding between your house & shed, 10-3 UF will be fine.

However, 10-3 with ground would avoid any potential problems that might come up in the future should one of those paths be installed.

You will also need to install 2 ground rods at the shed & connect them to the neutral bus if using 10-3 or the ground bus if using 10-3 with ground.

I recommend that you install a spare pvc raceway between the shed & house. Plastic is cheap compared to the trouble of running a trench. You never know when you might decide that you can't live without cable TV or some other modern convenience in your shed.


07:30AM | 06/11/07
Member Since: 06/07/07
2 lifetime posts
I ended up using 8/3 for the feed.

I discovered something unusual during the install. All the outlets in my house show 125 volts on the meter.

The outlets in my shed read the same.

The main panel reads 125 volts too.

I asssumed there would be some drop in voltage, especially at the shed.


08:50AM | 06/11/07
Member Since: 04/25/05
1915 lifetime posts
You have to be drawing current to get a voltage drop.

And the more current the higher VD.
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