running a sub pannel off another sub pannel.

[justin1795]

first off the basics we have 200 amp service to the house and adding another meter is not practical based on the location of the hookup. we are just about out of space in our house panel.

we have a pool out back and it has a outdoor panel the pump runs under 20amps and there is a pool light also I believe its 15 amps. when I put my building up the wire from the house to the building will run right next to this pool subpanel. I was thinking it may make sence to re do the wiring and run a larger outdoor subpanel to the pool. then run off the outdoor subpanel to my building. this way I wont have to run conduit threw the house for the service wiring. the building will probly be a 100 amp service and a distance of about 125 foot. away from the pool panel perhaps less depending on panel location

 

[Mustang51js]

As long as grounds and neutrals are separated your good to go.

 

[pattenp]

Remember to account for possible voltage drop for distance. You need to consider the distance from the main panel to the first sub and then the distance from the first sub to the second sub. In other words the feed to the first sub needs to be able to handle the load to the second sub.

 

[justin1795]

i was wondering about that. perhaps do 125 amps to the pool panel. my question is will the wire fit into the breaker? i would probly be at 2/0 wire.

 

[pattenp]

2/0 should fit in a 80A and up breaker.

 

[justin1795]

That would be good. I have a buddy who has 2 90 foot pieces of copper 2/0 he will sell to me at scrap value. I probly only have a 40 foot run so I will just have to buy a ground wire

 

[Junkman]

You have a total of 180 feet, and need 160 feet total. You have plenty of wire. Buy a roll of white electrical tape, to identify the neutral, and you are home free for the price of a roll of white tape.

 

[Norcal]

Because the ungrounded are increased in size, the grounding conductor has to be increased in size, per NEC article 250,122(B).