Xantrex PV30208 Install in LA [RE-wrenches]

[Joel Davidson]

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Peter,
You got it right. The listed inverter and recognized isolation transformer 
are a kit. What is the inspector's name?
Joel Davidson

----- Original Message ----- 
From: <peter.parrish at calsolareng.com>
To: <RE-wrenches at topica.com>
Sent: Friday, June 17, 2005 12:16 PM
Subject: Xantrex PV30208 Install in LA [RE-wrenches]


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We recently finished installation of a 36kW-STC grid-tied PV system in
the City of LA and encountered some difficulty with our Building and
Safety inspector wrt the Xantrex PV30208 with 208Y/480Y isolation
transformer.

We purchased a "grid-tied kit" from Xantrex which consisted of a PV
combiner box, DC disconnect, inverter, transormer and AC disconnect.

It was our understanding that the inverter/transformer was a single
power source and had been tested to UL1741. We provided a continuous
ground from the inverter chassis ground stud, to aisolation tranformer
chassis ground to a cold water pipe; and we furnished the wiring between
the inverter and transformer via a short section of 1-1/4" EMT.

Our inspector wanted to treat the inverter and isolation transformer as
seperately derived power sources with separate grounds to a cold-water
pipe and an additional fusible disconnect between the two.

I have spoken to the Xantrex Project (Product) Engineer as well as the
Manager, Quality Systems for the PV seriews inverters and they have
provided documentation to support the contention that the inverter and
transformer comprise a single "system kit" that has been tested and
certified by UL to be in compliance with UL1741 as well as
IEEE-929-2000.

I am prepared to do as the B&S inspector requires, but I would also like
to know if anyone else has encountered this problem or a similar one in
connection with the PV30208 inverter.

- Peter Parrish

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