Dual 150A panels on 200A meter and meter can

B

B677

Member
Location
Florida
Occupation
EC
Is compliant to do a like for like change out ? Right now there is a 200A meter and parallel 2/0 AL running through the back into the panels that each have a 150A main. I don't forsee based on asking the customer that we would ever draw 200A over 3 hours.

The underground feed to the house 4/0 AL owned by FPL

Was Looking at 400A meter cans locally they have massive 3" knockouts and all of them have a bypass handle.
 
B677 said:
I don't forsee based on asking the customer that we would ever draw 200A over 3 hours
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A continuous load is not relevant to the service conductors. If the load calculation for both panels is 200 amps or less then there I no issue with the two 150 amp panels.
 
1. Is your new 200 amp meter can rated to accept (2) 2/0s per lug ? (I've not seen one here that is so rated)
 
infinity said:
A continuous load is not relevant to the service conductors. If the load calculation for both panels is 200 amps or less then there I no issue with the two 150 amp panels.
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Thanks for the reply. I am not familiar seeing this layout of twin 150A panels on a 200A meter

In addition I have not done a residential over 225A yet as most homes I've done are on natural gas or on the smaller end and get a 200A panel. Technically the 225 OCPD on a 200A meter is a similar situation (less 75A of the twin 150s)

This particular customer has twin 150A Zinsco panels on a 200A smart meter. I looked at the 320/400 meter cans and meter mains and they are massive - have at least a 3" knockout for the utility feed. The layout is already tight so not having to upgrade to a higher rated meter is a plus

So if the load calc is ok and I swap out the load side lugs on my meter enclosure with ones rated for two conductors I should be compliant correct?

Meters jump from a 200 to 320 right? There is no in between that I could find or have ever heard of
 
Seems to be an AJH/ inspector specific thing
Talked to two inspectors and one didn't;t know the other said for twin 300A panels I definitely need a 320/400 meter enclosure
 
B677 said:
Seems to be an AJH/ inspector specific thing
Talked to two inspectors and one didn't;t know the other said for twin 300A panels I definitely need a 320/400 meter enclosure
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You could have two 400 amps panels and still keep the 200amp meter. When there is more than one service disconnect the load calculation will determine the size of the service conductors and therefore the size of the meter enclosure. If you're just replacing the junk Zinsco's you can put back two new 150 amp panels and leave the rest as is.
 
I have no idea what this install looks like but I would probably install (1) 200 amp service panel and then feed the additional panel with a ~100 amp feeder off the service panel.

I don't see many 200 amp meter sockets in my area. Everything is a Combinations Service Entrance Device. The 200 amp meter sockets I do see don't usually have provisions for double lugs plus there is not a lot of wiring room.
 
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