Feeding House Panel from Main Garage Panel

[dirtrunner0519]

I am looking at moving my main panel to the garage and feeding the main house via underground conduit. We are building a new house and would prefer the clean look of no wires connecting to the house. The garage is detached.

I was looking at running a 400 amp panel on the garage with a 200 amp on the house. My electrical needs for the garage or as follows below, I have not done any calcs yet. I am still at the beginning stages for the panel in the garage. The house is calculated and requires a 200 amp panel.

220v welder w/ 50A
220V Plasma w/ 50A
220V 2 Post Lift 30A
220V Compressor 30A
110V Grinders
Misc Power Tools
Home Media Center Dedeciated 20A
220v Split AC system 30A
Misc Electronics. TV, Coffee Machine, Chargers.
Lighting (Unknown at this Point)

Shop size is 30x30 with a loft above.

Looking at using this panel for the garage then feeding the house with 2/O wire.
https://www.platt.com/platt-electri.../Eaton/CG1212P400BSL/product.aspx?zpid=694306

Opinions on size of wire and panel?

 

[sberry]

The garage will run on 100. The list above is the breaker sizes and not the actual load.

 

[sberry]

What state are you in and what power company. Many provide meter bases, a 325 is common for this and will support 2 -200

 

[ForceFed70]

I agree - 100A is more than enough for the garage.

How do you plan to heat the house? 200A service is much cheaper if you can swing it. Feed 200A into the garage, then feed the house 200A via the garage panel.

Unless you are heating with electricity 200A service will be plenty.

 

[theoldwizard1]

What state are you in and what power company. Many provide meter bases, a 325 is common for this and will support 2 -200

Plus, getting "true" 400A from your POCO could be difficult/expensive !

 

[larry4406]

While doing this, setup the garage so that house sub panel is on a generator and put the gen set out far away by the garage.

 

[notso]

This is how I did mine, 200 amp service to my garage and I ran the house on a 100 amp breaker so I could just kill power when needed while building. And as mentioned above set it up for generator from start and keep the noise away from house.

 

[CheapCharlie]

Dual lug meter socket. 200A service from the POCO. 100A main panel in shop and 200A main panel in the house. Each panel will require its own grounding system (rods/plate)


Sent from my iPhone using Tapatalk

 

[wyliesdiesels]

I am looking at moving my main panel to the garage and feeding the main house via underground conduit. We are building a new house and would prefer the clean look of no wires connecting to the house. The garage is detached.

I was looking at running a 400 amp panel on the garage with a 200 amp on the house. My electrical needs for the garage are as follows below, I have not done any calcs yet. I am still at the beginning stages for the panel in the garage. The house is calculated and requires a 200 amp panel.

220v welder w/ 50A
220V Plasma w/ 50A
220V 2 Post Lift 30A
220V Compressor 30A
110V Grinders
Misc Power Tools
Home Media Center Dedeciated 20A
220v Split AC system 30A
Misc Electronics. TV, Coffee Machine, Chargers.
Lighting (Unknown at this Point)

Shop size is 30x30 with a loft above.

Looking at using this panel for the garage then feeding the house with 2/O wire.
https://www.platt.com/platt-electri.../Eaton/CG1212P400BSL/product.aspx?zpid=694306

Opinions on size of wire and panel?

DO the calcs on the garage but if house needs 200a then youre gonna need to spring for the 400a/320 continuous service.

for sizing wire, we will need the distance panel to panel...

BTW, what is your location?

What state are you in and what power company. Many provide meter bases, a 325 is common for this and will support 2 -200

ITs a 320 contnuous/400a service... not 325...

 

[sberry]

It's like this.

 

[dirtrunner0519]

My location is Los Angeles. I also forgot to mention we will be possibly putting in a pool and or jacuzzi. Run from the Garage panel to the house is approx 80'. Will hook up the generator connection on the garage, just have to look more into that. I know there are threads on here, just have not had time to search out that part yet.

 

[bob_mp]

The garage will run on 100. The list above is the breaker sizes and not the actual load.

If you plan on running a rotary phase converter (RPC) to power three phase tools, 100A is borderline. For a good sized RPC, the inrush currents when starting can be really high and can definitely trip a 100A breaker.

I have 400A (320 continuous) service with a dedicated 200A main breaker for the garage. My RPC (GWM Digi 286) is hooked up to a 100A breaker in the garage panel. This breaker does trip every once in a while when starting up the RPC (by means of a contactor).

In my old shop, I'd occasionally trip the main breaker (100A) when starting the phase converter, which took out the lights as well. Definitely not fun at night.