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Joined: Feb 2002
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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.
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Joined: Jul 2004
Posts: 9,932 Likes: 34
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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
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Joined: Apr 2002
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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
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Joined: Jul 2004
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I guess I was confused by 705.12(D) (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
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Joined: Apr 2002
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Greg: 705-12 (D)(6) permits the backfed CB from requiring a clip.
John
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Joined: Jul 2004
Posts: 9,932 Likes: 34
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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
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Joined: Apr 2002
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'Line side tap' on load side of the utility meter.
John
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Joined: Jul 2004
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I see that now. I am still curious why anyone would. Just when I thought this was starting to make sense to me too
Greg Fretwell
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Joined: Apr 2002
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Greg: Read further.....120/125% of buss rating defeats the backfed CB on some solar installs.
John
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Joined: Jul 2004
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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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Posts: 806
Joined: October 2004
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