120% allowance is only "..For a dwelling unit....". 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.
Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of August Goers Sent: Friday, December 05, 2008 5:01 PM To: RE-wrenches Subject: Re: [RE-wrenches] load side taps and NEC 240.21 Jerry - 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. Good luck! -August August Goers Luminalt Energy Corporation 4000 Irving Street San Francisco, CA 94122 Office: 415.564.7652 Mobile: 415.559.1525 [EMAIL PROTECTED] www.luminalt.com _____ From: William Miller <[EMAIL PROTECTED]> To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Sent: Friday, December 5, 2008 4:11:15 PM Subject: Re: [RE-wrenches] load side taps and NEC 240.21 Jerry: At a recent John Wiles seminar, John declared that this scenario is not a tap and is therefore not covered under the tap rule. This was news to me, but Wiles is considered some sort of guru in compliance discussions. William Miller At 03:43 PM 12/5/2008, you wrote: >Wreches, > > >I have a system where we are tapping onto the bus bars of a 1200 amp panel >fed by a 1200 amp main breaker. The easy place to tap onto the bus bars >is the load side of the breaker using the existing bolts. > > >The inverter and utility fused disco are about 200 ft away, and the tap >conductors travel about15ft in EMT conduit before leaving the >building. After that the circuit is outdoors. NEC 240.21(B)5 allows taps >of unlimited length for conductors located outside of a building, except >at the point of load (in this case supply) termination. > > >Can 20ft of conductor inside the building be covered by being "at the >point of load termination", or do I have to comply with NEC 240.21(B)2 and >have an OCPD within 25'? > > >The construction foreman for this project is buddies with the inspector, >so getting a signed permit won't be a problem but I want this to be a code >compliant system. Can anyone lend some insight to the spirit of >240.21(B)2 and 5? > > >Sorry if this has been discussed before, but searching didn't yield any >results. > > >Best, > >Jerry Caldwell > >Recurrent Energy > >_______________________________________________ >List sponsored by Home Power magazine > >List Address: RE-wrenches@lists.re-wrenches.org > >Options & settings: >http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >List-Archive: >http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > >List rules & etiquette: >www.re-wrenches.org/etiquette.htm > >Check out participant bios: >www.members.re-wrenches.org _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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