Second UG service to house

[ammklq143]

I have a customer that's building an addition onto their house. Their main panel is full and finished ceilings will make it hard to do a sub panel and run circuits to the addition. Just wondering if anyone sees any issues with this:

The service pole has a 100 amp combination meter/breaker with a 100 amp feed to the house panel. I'd like to add a 2nd 100 amp UG feeder to the addition and have a 2nd panel for that.

1. Are there any issues with a 2nd panel installed in the addition being fed from a 2nd UG set of conductors from the same 100 amp breaker on the pole that feeds the original house panel?

2. If it's ok to do it that way, would the 2nd panel be ok to be fed with #2 aluminum or would it have to be 1/0? 310.12 says #2 alum for a 100 amp, but says if it is "supplying the entire load associated with a one family dwelling" etc. Each panel would be supplying part of the load, so neither would be supplying the entire load.

3. What about the emergency disconnect on structure? Wouldn't want to add one for the addition to meet current NEC and have someone think that disconnected the whole house and wouldn't want to add another one for the original service unless they were side by side, so.....?

Thanks for the help and any suggestions.

 

[augie47]

230.2 (Services) and 225,30 (Feeders) will not allow a 2nd service or feeder in your situation (the exceptions would not apply) .
Since the answer to #1 is "not allowed", #2 and #3 aren't relevant.

 

[ammklq143]

230.2 (Services) and 225,30 (Feeders) will not allow a 2nd service or feeder in your situation (the exceptions would not apply) .
Since the answer to #1 is "not allowed", #2 and #3 aren't relevant.

I was wondering about that. Thank you for your help.

 

[hillbilly1]

Is the existing panel on an outside wall? Could possibly go out the back, underground then back in at the new addition with a sub panel.