[RE-wrenches] Load or Line Side was Solar accumulation panel

Dave Click daveclick at fsec.ucf.edu
Tue Mar 9 07:49:15 PST 2010


Late reply, but if anyone ever needs the code reference for William's 
method:
404.6 Position and Connection of Switches.
(C) Connection of Switches. Single-throw knife switches and switches 
with butt contacts shall be connected such that their blades are 
de-energized when the switch is in the open position.

Voila- PV to the load side.

-------- Original Message --------
Subject: Re: [RE-wrenches] Load or Line Side was Solar accumulation  panel
From: William Miller <william at millersolar.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Date: 2010/1/13 22:51

> Carl:
>
> You are correct. I had the exact argument with an inspector. Here is
> what I did to make a convincing argument: I opened the disconnect and
> then reached in and touched the load side contacts (inverter side) with
> my fingers. I turned to the inspector and said, "Now it's your turn to
> touch the line side." Case closed.
>
> William Miller
>
>
> At 05:17 PM 1/13/2010, you wrote:
>> Wrenches,
>>
>> I just had an AHJ require me to switch the load and line connections
>> on the fused AC disconnect which sits between the inverters (AC
>> Combiner panel) and the point of utility connection. The inverter
>> was connected on the LOAD side of the fused disconnect, and while the
>> AHJ agreed this was the safest configuration, (when the disco is OFF
>> the fuses are safe to remove) he insisted that the PV array should be
>> connected to the LINE side of the disconnect since it is supplying
>> power rather than acting as a LOAD. Any similar experience or
>> arguments I can make based on the NEC which might help change the
>> position of the AHJ next time round? I still believe our initial
>> installation represents the safest configuration.
>>
>> Carl Adams
>> SunRock Solar, LLC
>> _
>
>
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