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<TITLE>Re: [RE-wrenches] load side taps and NEC 240.21</TITLE>
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<FONT SIZE="4"><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>The 2008 NEC broaden this 120% allowance to include commercial facilities. There are some additional requirements to be aware of in order to use the 120% allowance.<BR>
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On 12/5/08 7:10 PM, "Mark Frye" <markf@berkeleysolar.com> wrote:<BR>
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</SPAN></FONT></FONT><BLOCKQUOTE><FONT SIZE="4"><SPAN STYLE='font-size:11pt'><FONT COLOR="#0000FF"><FONT FACE="Arial">120% allowance is only "..For a dwelling unit....".<BR>
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</FONT><FONT COLOR="#0000FF"><FONT FACE="Arial">Clearly this is a load side Point of Connection. If it is a "dwelling unit"" then the 120% allowance is applicable. If it is not a "dwelling unit", then there is no room to connect under NEC 2008.<BR>
</FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">Mark Frye</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">Berkeley Solar Electric Systems</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">303 Redbud Way</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">Nevada City, CA 95959</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">(530) 401-8024</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT COLOR="#0000FF"><FONT FACE="Arial"><U>www.berkeleysolar.com</U></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <a href="http://www.berkeleysolar.com/"><http://www.berkeleysolar.com/></a> </FONT><FONT FACE="Arial"> </FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
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<HR ALIGN=CENTER SIZE="3" WIDTH="100%"></FONT><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org]">mailto:re-wrenches-bounces@lists.re-wrenches.org]</a> <B>On Behalf Of </B>August Goers<BR>
<B>Sent:</B> Friday, December 05, 2008 5:01 PM<BR>
<B>To:</B> RE-wrenches<BR>
<B>Subject:</B> Re: [RE-wrenches] load side taps and NEC 240.21<BR>
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</FONT></SPAN><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'>Jerry - <BR>
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A line tap typically occurs between the utility meter and the main breaker - not after the main breaker on the load side. It seems that you are describing a load side tap which follows the 120% rule under 2008 NEC; I might be misunderstanding the situation. Please clarify. There are few folks out there who are able handle these large commercial grade interconnections and I think it is well worth discussing.<BR>
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Good luck! -August <BR>
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August Goers<BR>
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Luminalt Energy Corporation<BR>
4000 Irving Street <BR>
San Francisco, CA 94122<BR>
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Office: 415.564.7652<BR>
Mobile: 415.559.1525<BR>
august@luminalt.com<BR>
www.luminalt.com<BR>
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</SPAN></FONT><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><HR ALIGN=CENTER SIZE="1" WIDTH="100%"><B>From:</B></SPAN><SPAN STYLE='font-size:10pt'> William Miller <wrmiller@charter.net><BR>
<B>To:</B> RE-wrenches <re-wrenches@lists.re-wrenches.org><BR>
<B>Sent:</B> Friday, December 5, 2008 4:11:15 PM<BR>
<B>Subject:</B> Re: [RE-wrenches] load side taps and NEC 240.21<BR>
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Jerry:<BR>
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At a recent John Wiles seminar, John declared that this scenario is not a <BR>
tap and is therefore not covered under the tap rule. This was news to me, <BR>
but Wiles is considered some sort of guru in compliance discussions.<BR>
<BR>
William Miller<BR>
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At 03:43 PM 12/5/2008, you wrote:<BR>
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>Wreches,<BR>
><BR>
><BR>
>I have a system where we are tapping onto the bus bars of a 1200 amp panel <BR>
>fed by a 1200 amp main breaker. The easy place to tap onto the bus bars <BR>
>is the load side of the breaker using the existing bolts.<BR>
><BR>
><BR>
>The inverter and utility fused disco are about 200 ft away, and the tap <BR>
>conductors travel about15ft in EMT conduit before leaving the <BR>
>building. After that the circuit is outdoors. NEC 240.21(B)5 allows taps <BR>
>of unlimited length for conductors located outside of a building, except <BR>
>at the point of load (in this case supply) termination.<BR>
><BR>
><BR>
>Can 20ft of conductor inside the building be covered by being "at the <BR>
>point of load termination", or do I have to comply with NEC 240.21(B)2 and <BR>
>have an OCPD within 25'?<BR>
><BR>
><BR>
>The construction foreman for this project is buddies with the inspector, <BR>
>so getting a signed permit won't be a problem but I want this to be a code <BR>
>compliant system. Can anyone lend some insight to the spirit of <BR>
>240.21(B)2 and 5?<BR>
><BR>
><BR>
>Sorry if this has been discussed before, but searching didn't yield any <BR>
>results.<BR>
><BR>
><BR>
>Best,<BR>
><BR>
>Jerry Caldwell<BR>
><BR>
>Recurrent Energy<BR>
><BR>
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