Class 320 Meter Panels

[Jackl]

Can a meter panel with a meter socket rating of 400 Amp Max; 320 amp continuous and a Device rating of 400 Amp Max 120/240 volts 1 phase 3 wire be used for a single family residence with a calculated load of 380 amps?

 

[jumper]

In general yes.

The combination of residential continuous and non continuous loads does not exceed the equipment ratings.

 

[Little Bill]

I'd love to see the load calculation that came up with 380A on a dwelling.

 

[Jackl]

I'd love to see the load calculation that came up with 380A on a dwelling.

In the neighborhoods i work in I routinely see 600 and 800 amp services.

 

[Little Bill]

In the neighborhoods i work in I routinely see 600 and 800 amp services.

I wasn't doubting you, I just wanted to see what was there to cause that high of a load.
However, I see 400A services around me that I bet won't ever see 100A. "Bigger is better" is a lot of peoples thinking.

 

[Jackl]

I wasn't doubting you, I just wanted to see what was there to cause that high of a load.
However, I see 400A services around me that I bet won't ever see 100A. "Bigger is better" is a lot of peoples thinking.

I post the load schedule next week. I’ve got it at work. Tesla wall chargers, solar power...

 

[jumper]

I post the load schedule next week. I’ve got it at work. Tesla wall chargers, solar power...

We are not doubting that a full NEC load calculation could be that high, but in reality, the actual running loads rarely even come close. NEC calcs are quite conservative.

 

[Vince1971]

I'd like to know what size conductors your POCO hits it with. I'll bet nothing close to your load calculation.

 

[jaggedben]

Tesla wall chargers, solar power...

Those things aren't loads. Especially not the latter.

 

[iceworm]

I wasn't doubting you, I just wanted to see what was there to cause that high of a load. ...

cubic money.

I'd like to know what size conductors your POCO hits it with. I'll bet nothing close to your load calculation.

I'd be more interested in the size of the transformer. Just imagine the customers attitude if the lights blinked every time both Telas hit the fast charge at the same time

 

[Carultch]

In general yes.

The combination of residential continuous and non continuous loads does not exceed the equipment ratings.

Just to be clear on this, it is 100% noncontinuous + 100% continuous, that must add up to 320A, to use a 320A meter socket. Is this correct? If not, what am I not understanding?

By contrast, it is 100% noncontinuous + 125% continuous, that sizes the 400A breaker. So on occasion, as a consequence of this difference in sizing algorithms, you may have 320A meter sockets be incompatible with a load mix that fits on a 400A breaker.