Bill and others. I dont remember what type fuses are needed in conjunction
with the AC disconnect.
- Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parr...@calsolareng.com
Ph
Behalf Of Ryan LeBlanc
Sent: Wednesday, March 31, 2010 4:29 PM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Steven,
A Line Side Tap, by nature, allows us 100% of the Service Entrance Conductor
Ampacity. This typically ~equals Main Breaker r
Seconded! AMEN.
Dick Ratico
Solarwind Electric
--- You wrote:
Steven,
A Line Side Tap, by nature, allows us 100% of the Service Entrance Conductor
Ampacity. This typically ~equals Main Breaker rating, but is regardless of
the Main Breaker rating or size of Loads, it's about the conductor. NEC
rom the backup load panel.
Steven Lawrence
__
Date: Wed, 31 Mar 2010 08:13:10 -0700 (PDT)
From: Nick Soleil
To: RE-wrenches
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Message-ID: <342120.66732...@web44904.mail.sp1.yahoo.com>
Content-Type: text/plain; ch
n a client.
Steven Lawrence
Date: Wed, 31 Mar 2010 11:39:32 -0700
From: "Hans Frederickson"
To: "'RE-wrenches'"
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Message-ID: <3ee2af007f5d4ebe96831c2254b5e...@frederickson.local>
Content-Type: t
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nick Soleil
Sent: Wednesday, March 31, 2010 12:15 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
I feel confident that the load will not be over 80 Amps at any time, and
therefore do not think
Sent: Wed, March 31, 2010 9:19:48 AM
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
We
recommend to the customer to upgrade their service if it’s not adequate
(old/outdated/too small). In the
grand scheme of things, that’s a small add-on. Whenever there’s a questionable
in
wrenches-boun...@lists.re-wrenches.org] On Behalf Of Steven
Lawrence
Sent: Wednesday, March 31, 2010 11:04 AM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
230.80
"Where the service disconnecting means consists of more than one switch or
n Lawrence
___
Message: 1
Date: Wed, 31 Mar 2010 10:24:17 -0700
From: "Hans Frederickson"
To: "'RE-wrenches'"
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Message-ID: <71328cbb96b745889f63e627c93e8...@frederickson.local>
Content-Type: text/
f Of Steven
Lawrence
Sent: Wednesday, March 31, 2010 9:54 AM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Why can't you do a line side tap and downsize the main breaker? Use a 60A
main disconnect for the line side tap, and use a 60A mai
n the main service panel that
can be fed from the backup load panel.
Steven Lawrence
__
Date: Wed, 31 Mar 2010 08:13:10 -0700 (PDT)
From: Nick Soleil
To: RE-wrenches
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
-9037
_
From: Eric Andrews
To: RE-wrenches
Sent: Tue, March 30, 2010 10:25:45 AM
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Nick-
Just downsize the main breaker. For example, a 200 amp panel w/ a 200 amp
main breaker could be reduced to a 150 amp main breake
Office: 707-789-9537
Fax:707-769-9037
From: Eric Andrews
To: RE-wrenches
Sent: Tue, March 30, 2010 10:25:45 AM
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Nick-
Just
downsize the main breaker. For example,
a 200 amp panel w/ a 200
Nick-
Just downsize the main breaker. For example, a 200 amp panel w/ a 200 amp main
breaker could be reduced to a 150 amp main breaker to allow for more solar to
be connected. You need to calculate for the 120% rule.
Eric R. Andrews
NABCEP Certified PV Installer
_
, CA 94953
Cell: 707-321-2937
Office: 707-789-9537
Fax:707-769-9037
From: Bill Brooks
To: RE-wrenches
Sent: Sun, March 28, 2010 10:04:22 PM
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Dave,
All line side connections must
have
ches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo
Sent: Sunday, March 28, 2010 10:53 AM
To: 'Wrench List'
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Wrenches,
I am tasked with reviewing an installation by a licensed electrician in Vermont
and would like help
Looks like your question is answered but something else to look out for-
this is pretty straight-forward for batteryless systems but for
battery-backup and a line-side tie, you're adding a big load to the
service conductors for battery charging and pass-through current to
critical loads. If you
Behalf Of Dave Palumbo
Sent: Sunday, March 28, 2010 10:53 AM
To: 'Wrench List'
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
Wrenches,
I am tasked with reviewing an installation by a licensed electrician in
Vermont and would like help with the following:
I have always thought it was the same calculation as the Fault current as
calculated in NFPA 70E. but I will ask some one whom I respect.
Darryl
--- On Sun, 3/28/10, R Ray Walters wrote:
From: R Ray Walters
Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
To: "RE-wre
rvice to Overcurrent protection.
Darryl
--- On Sun, 3/28/10, Scott McCalmont wrote:
> From: Scott McCalmont
> Subject: Re: [RE-wrenches] Supply Side Tap Overcurrent Protection
> To: "RE-wrenches"
> Date: Sunday, March 28, 2010, 9:22 PM
> I would add the following NEC article
This brings up a related question, that I can't seem to find an NEC answer to:
How do we calculate the available fault current, for picking our AIC rating?
I used to always throw 20,000 amps AIC rating fuses and breakers for large
battery banks, but on grid, it seems we would have to know things
I would add the following NEC article relevant to services:
230.91 Location. The service overcurrent device shall be an integral
part of the service disconnecting means or shall be located
immediately adjacent thereto.
Fifteen feet isn't "immediately adjacent."
Regards,
Scott
Scott McCalmont, P
Dave,
OK, here's my shot at this. Your mileage may vary. I think 240.86(A) applies
here. Unless the CB in the Xantrex XW has a higher interrupt ratting (AIC) than
the available fault current from that supply side tap and the CB is so marked
(240.83(C), a disconnect using appropriate current limi
Wrenches,
I am tasked with reviewing an installation by a licensed electrician in
Vermont and would like help with the following:
Grid-tied PV system with battery back-up. AC point of connection is a supply
side tap (done on customer side of utility meter ) then traveling 5 feet of
#2 THHWN
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