[RE-wrenches] Up for a 1-Line Riddle?

[Dave Click]

I've seen that one a lot, too. And not to quibble, but the 1-line 
depicts this correctly (no inline fuse shown in the inverter DC 
disconnect box), though there should be a note making this more explicit.

Speaking of sunny days turning off the system, how about the 3 30A 
inverter breakers' combined feed going into a 55A breaker. Also... a 55A 
breaker? Really? I guess the designer wanted to leave a little headroom 
to avoid scaring the 60A disconnect.

DKC

On 2012/8/30 14:35, Andrew Truitt wrote:
>
> Ahh yes, the old "combine strings before landing on a fused DC input
> terminal" trick.  Sure to blow the fuse the first sunny day.  This is
> why SMA created their fuse-bypass DC input terminal.  I take it the
> installer was not aware of this...
>
>
>
> For a brighter energy future,
>
>
> Andrew Truitt
> NABCEP Certified PV Installer™ (ID# 032407-66)____
>
> Principal
> Truitt Renewable Energy Consulting____
>
> (202) 486-7507 <tel:%28202%29%20486-7507>____
>
> http://www.linkedin.com/pub/andrew-truitt/8/622/713
>
>
>
> "Don't get me wrong: I love nuclear energy! It's just that I prefer
> fusion to fission. And it just so happens that there's an enormous
> fusion reactor safely banked a few million miles from us. It delivers
> more than we could ever use in just about 8 minutes. And it's wireless!"
>
> ~William McDonough
>
>
>
>
>
>
> On Thu, Aug 30, 2012 at 11:53 AM, Jason Szumlanski <jason at fafcosolar.com
> <mailto:jason at fafcosolar.com>> wrote:
>
>     I was sent to look at another contractor's work, and found three
>     SB5000 inverters with blown string input fuses. I was able to
>     determine the reason pretty quickly, and was later sent the original
>     1-Line, which was installed per the drawings. The 1-Line came from a
>     "leading system integrator" who shall remain nameless.
>
>     See anything wrong?
>
>     https://www.sugarsync.com/pf/D6539806_8669786_010829
>
>     Just goes to show you - the contractor needs to take responsibility
>     and verify the specifications are correct, safe, and code compliant.
>
>     Jason Szumlanski
>     Fafco Solar
>
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