Solar Inverter tie to house system - 120% Rule help

ggunn said:
It wouldn't make any difference whether you asked or not. Both utilities (AE and CPS) inspect every PV system that gets installed in their jurisdiction, and if a system is not installed in accordance with their rules it fails the inspection even if it is NEC compliant. There are many AHJs in Texas that are difficult to deal with in varying aspects; things are apparently different in Oregon.
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Yeah I am not surprised, utilities an hour south of me have vastly different requirements than the four publicly owned one's here locally. And all four of the local ones have different specs LOL.
What I found is here all of them in the entire state allow a customer to have more than one service disconnect,
and all allow a PV backfeed from an existing service disconnect.
But if AE and CPS standards don't allow more than one service disconnect and a back feed from an existing service disconnect then yeah PV would be very problematic to install.
 
tortuga said:
... if AE and CPS standards don't allow more than one service disconnect and a back feed from an existing service disconnect then yeah PV would be very problematic to install.
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You misunderstand me. AE and CPS both allow more than a single service disconnect, but a service conductor split point cannot be in the metering equipment.
 
electrofelon said:
Just curious how is a typical 400A residential service with 2 200A panels done? Is there a splice box after the meter? Strange requirement.
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I did a little digging Page 84, 1.9.1.3 of this:

seems to indicate gunny is correct they do not allow my method in a 200-S meter socket,
however they do allow it with a class 320 meter under the condition
(2) parallel can be allowed on the load side so long as the wire
rating is equal to or less than the line side conductor ampacity rating.
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And it appears to be allowed out of a CT can if
All wire coming and leaving a CT service must be consistent in size and type
(Example: 2-500cu on the line side must be 2-500cu on the load side)
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tortuga said:
I did a little digging Page 84, 1.9.1.3 of this:

seems to indicate gunny is correct they do not allow my method in a 200-S meter socket,
however they do allow it with a class 320 meter under the condition


And it appears to be allowed out of a CT can if
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I have never built a service, so I cannot comment on the above, but within AE, solar interconnections have their own rules, and PV connections inside a meter enclosure or CT can are not allowed, or at least they weren't before I retired a couple of years ago. There was a new release of their PV interconnection guidelines document a couple of months ago which I have not read in detail, so I guess it is possible that the rules have changed.
 
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