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
>
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