[mtc701]

I need a little help trying to figure out if I will need a service upgrade based on a couple things...
- addition of a Barn (probably 50A)
- removing a sub-panel (50A) and adding it to the main panel

For starters the existing main panel is 100A. So if for example both the 50 amp circuits were pulling all of their amps and the main panel needed all 100 amps of its loads then a new main panel would require a 200 amp capacity? I am just not sure if thats the way you figure out loads when adding auxillary circuits. Doesnt seem right unless the main panel was oversized and had 50 amps to give the existing sub panel (which is rated at 50A).

Would be alot easier to just run a meter to the new barn for a separate service but the barn sits 300' from the house and the overhead service would just get in the way of moving tractors around.

 

[backstay]

You need to do a load calc. You haven't given us enough information to do it for you. Check out the examples in the back of the NEC.

 

[mtc701]

Now that i think about it, sounds like i just asked a dumb question because the auxiliary circuits only need 50 amps each and the existing only needed 100 amp panel. So without adding anything new a 200 amp panel would definitely cover everything. Hopefully the owner would just agree to a panel change and a service upgrade.

 

[backstay]

Now that i think about it, sounds like i just asked a dumb question because the auxiliary circuits only need 50 amps each and the existing only needed 100 amp panel. So without adding anything new a 200 amp panel would definitely cover everything. Hopefully the owner would just agree to a panel change and a service upgrade.

You should still do a load calc. If nothing else, for the practice.

 

[wendon]

If we're gonna help you we're gonna need mo info.

 

[finster]

If we're gonna help you we're gonna need mo info.

What's brown and rhymes with snoop?

 

[SamoanThor]

What's brown and rhymes with snoop?

A commemorative Hershey's syrup brown plastic ice cream scoop.

 

[finster]

A commemorative Hershey's syrup brown plastic ice cream scoop.

Also dr dre. .... is brown and rhymes with snoop.

 

[SamoanThor]

Also dr dre. .... is brown and rhymes with snoop.

...... I see what you did there.

 

[finster]

...... I see what you did there.

Classic.... I had to pass that gem on

 

[MDShunk]

Why does the owner even need to know, and agree with a 200-amp upgrade? The told you the scope of work. Bid the right money for what you need to do. Get a signature. Get to work.