Dual lugged meter line side tap

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Zyb

Zyb

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Location
Maine
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Design Engineer
I'm planning to upgrade to a 400A service, and install a PV system. this is how I plan it. Is this code complaint?

dual lug.png
 
It seems to me that each tap must connect to both conductors, despite how close you are to the terminals, and even though the conductors are not actually in parallel..
 
LarryFine said:
It seems to me that each tap must connect to both conductors, despite how close you are to the terminals, and even though the conductors are not actually in parallel..
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I don't believe that's the case, precisely because the conductors aren't in parallel.

The 100A panel and conductors are too small. They need to be at least 125% * (47.5 + 47.5) = 119A.

Cheers, Wayne
 
Yes, that would be code compliant with a 125A or larger AC solar combiner panel, but check with your utility to see if they will allow the supply-side connection in their meter enclosure. Ours won't allow that.
 
To add on to what PW said definitely check with the utility that they will allow you in "their" enclosure but I also have a jurisdiction that will not allow a line side tap unless the main OCPD is <10" from the tap point.
 
Might be a little more elegant to replace those lugs with triple port ones, and probably it will be less likely the Poco will be unhappy with it because then you won't have a "tap" in the meter enclosure.

Also just to throw it out there, something I do a lot is use 230.40 exception 3 to qualify those conductors if that can be applied.
 
This looks compliant but it is the way I would see PV added to an existing service. If you are going to the trouble of upgrading the service you can integrate the PV much better than this.
 
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