[RE-wrenches] Conductor Sizing for Supply Side Connection

[Garrison Riegel]

Wrenches,

 

On an upcoming job we have a Xantrex XW4548 interconnecting with a 200A
service, and I'd very much appreciate some advice if y'all are willing.  

 

Since the inverter output OCPD is required to be 60A we are looking at a
supply side connection, and I have two questions:

 

1.       Before the point of interconnection the inverter output circuit
will first pass through the XW Power Distribution Panel and inverter bypass,
which is essentially a 60A breaker.  The service disconnect for the supply
side connection will also be fused at 60A.  Does the 120% rule apply to the
conductor between these two OCPDs?  Or since this is a supply side
connection in accordance with 690.64(A), 690.64(B)(2) will not apply? [this
AHJ is on the 2008 NEC]

 

2.       Can anyone recommend a reliable insulation piercing tap connector?
Or would you recommend something else entirely for a residential supply side
connection?

 

Thanks in advance,

 

Garrison

847-677-0950

Solar Service Inc.

 

 

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