OK4U - NEC question [RE-wrenches]

[jberdner at sma-america.com]

Ken:

Yes, essentially you are right and you would require a disconnect and OC
protection.
You might be able to get away without the disconnect if you use
connectors.
The Code says connectors can be used as a disconnect if it is Listed for
the purpose.  At a few hundred Watts the MC connectors >>might<< work.
The OC protection can also be eliminated if the OK4U does not back feed
a shorted module.  This is also allowed by the Code.  

If you have any questions, or if I can be of any further assistance,
please do not hesitate to contact me.

Best Regards,

John Berdner

SMA America, Inc.
20830 Red Dog Road
Grass Valley, CA  95945
530.273.4595 (voice)
530.274.7271 (fax) 


-----Original Message-----
From: Ken Hulet, Engineering Services Co.
[mailto:esco at revolutionearth.com] 
Sent: Monday, August 12, 2002 1:58 PM
To: RE-wrenches at topica.com
Subject: OK4U - NEC question [RE-wrenches]

I confess I don't have a copy of 2002 NEC Code!

I expect I won't like the answer BUT is it the case that combining a UL
Listed 
PV Module with a UL Listed OK4U inverter does NOT make a code acceptable
AC 
Module? And if this IS NOT an acceptable AC Module then overcurrent
protection 
and disconnect means would be REQUIRED on the DC side for each module?

If so I can see why people choose guerilla.

Would this be a potential revision to 2005 code issue?

Ken & Chris Hulet
Engineering Services Co.
P.O. Box 4
Blanchardville, WI 53516

608.523.3726

http://www.revolutionearth.com

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