New electric service

[shane772]

Hi all, Having a 40x40x14 pole barn installed on 20 acres with anticipation to build a house some day too. We are exempt from permits and inspections. I am going to buy all the supplies on Thursday to run the electric service this weekend. I have a 200 amp meter set on the pole. I purchased a 200 amp panel with feed through lugs and 4 breaker spots to mount on the pole under the meter. I plan to run 3/0 Copper wire in conduit to the house site and then daisy chain to the pole barn. My main question is; do I have to run a ground wire in the conduit to the house with the 3/0 or can I just ground it separately at the house and the barn? Thanks for any help you can offer.

 

[Stuart in MN]

What state or country are you in? Rules vary depending on location.

 

[shane772]

Guess I should fill in my info . . . Oklahoma, USA

 

[wyliesdiesels]

Since u will have disconnects at the pole u will need to run 4-wire feeders to both the house qnd the garage. U will need 2 ground rods for each subpanel and u will also need to isolate the neutral bars in the subs. This may require a separate ground bar kit depending on the brand of panel.

What size feeder are u running to each structure? How long are the runs?

 

[shane772]

Thanks for the info wyliesdiesels. Running 3/0 copper feeders and probably a #4 or 6 ground. Run from pole to house is ~270' and then ~30' from house to barn. Will use same feeder/ground size from house to barn.

 

[shane772]

Here's a pic of the box I'm planning to use under the meter

 

[wyliesdiesels]

Thanks for the info wyliesdiesels. Running 3/0 copper feeders and probably a #4 or 6 ground. Run from pole to house is ~270' and then ~30' from house to barn. Will use same feeder/ground size from house to barn.

What size service to each? 100a 200a, or ?

 

[Dagny]

Couldn't you get a little closer?

 

[shane772]

200 amp to house, 100 amp to barn. Really don't know if I need 100 at barn. We will have our RV plugged in part time and it's 50 amp, plus lights, outlets, etc inside barn.

 

[shane772]

Couldn't you get a little closer?

Possibly, but not easily. Would rather not have to deal with the elect company setting another pole.

 

[wyliesdiesels]

What electric loads will u have in the barn? One man shop?

For most one man shops, 100a is more than enough!

For the house @ 200a and 270' u need 3/0 CU like u said or 300Kcmil AL.

For the barn @ 100a and 300' u need

 

[theoldwizard1]

Check the pricing on aluminum wire. Big cost difference.

Also from the house to the barn I would use 2-2-2-4 MHf on a 90A breaker. Use a 100A load center in the barn.