Xantrex PV30208 Install in LA [RE-wrenches]

[peter.parrish at calsolareng.com]

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Joel. 

Right now I am trying to gather facts and inspection histories that 
would provide me with a compelling case for treating this system as a 
single derived power source. If you have anything along these lines, I 
would be greatful. I do not, however, think it would be useful to get 
third parties directly involved with the inspection or the inspector.

- Peter

Joel Davidson wrote:
> 
> 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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