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Joined: Feb 2002
Posts: 2,233
H
Member
John,

The main service panel was 200 amp with 4/0 wire and a tap of #6 copper. The conductor looked like @ (The Copy right insignia?) (or the AT sign)when he tapped it in mid stream.
I was just wondering if I can find a diagram or installation instruction somewhere. I also asked the PV people to provide that for me. If it shows that it can be done like that, I don't have a problem with it.

Joined: Jul 2004
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G
Member
I thought they usually ran the solar into the panels with a back fed breaker.
I guess I really need to go read up on 690.


Greg Fretwell
Joined: Apr 2002
Posts: 7,381
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Harold:

The info I posted here is from the Kupl-tap website. The graphics on the site only show STRAIGHT run/tap conductors. There was NO mention of installation on curved.

Please refer to the email I sent you.

Greg:

To comply with 690/705 some installs cannot use a backfed CB, and utilize a line side tap before the main OCP.



John
Joined: Jul 2004
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G
Member
I guess I was confused by 705.12(D)

Quote
(1) Dedicated Overcurrent and Disconnect. Each source
interconnection shall be made at a dedicated circuit breaker
or fusible disconnecting means


You really have more experience with this than me. I have never seen one that didn't just connect to a breaker plugged into the bottom of the bus with a clip. For living in the "sunshine state" we really do not have that much solar PV.


Greg Fretwell
Joined: Apr 2002
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Greg:
705-12 (D)(6) permits the backfed CB from requiring a clip.



John
Joined: Jul 2004
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G
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I guess I am just asking how you can make a tap to the conductor without the "dedicated breaker".


Greg Fretwell
Joined: Apr 2002
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'Line side tap' on load side of the utility meter.


John
Joined: Jul 2004
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G
Member
I see that now. I am still curious why anyone would.

Just when I thought this was starting to make sense to me too wink


Greg Fretwell
Joined: Apr 2002
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Greg:
Read further.....120/125% of buss rating defeats the backfed CB on some solar installs.



John
Joined: Jul 2004
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G
Member
OK Got ya.
Like I said, we don't have that much solar PV around here.
I do remember the 125% thing when I was looking at PV but I have a 200a rated panel with a 150 in it so it was not an issue at the time.



Greg Fretwell
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