[RE-wrenches] AC & DC in Raceway

Darryl Thayer daryl_solar at yahoo.com
Thu Sep 24 17:40:38 PDT 2009


Thanks, but I am still concerned, the "Handbook" is not the code.  In wire ways it is possible to include a divider, and pass the conduit from one source through the top half of the wire way and terminate in the lower half. Still neat, and yes we have had AHJ demand that separation.  
Darryl

--- On Thu, 9/24/09, Louis Woofenden <louis at woofenden.net> wrote:

> From: Louis Woofenden <louis at woofenden.net>
> Subject: Re: [RE-wrenches] AC & DC in Raceway
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Thursday, September 24, 2009, 7:01 PM
> 
> Hi Darryl,
> 
> For what it's worth, the '08 Handbook explains regarding
> 690.4(B):
> 
> "For example, 690.4(B) does not permit the conductors
> supplying an exterior luminaire located in close proximity
> to a roof-mounted PV array to be installed in the same
> raceway or conductors of of PV sources circuits or PV output
> circuits.
> 
> Conductors directly related to a specific PV system, such
> as those is dc and ac output power circuits, may be
> contained in the same raceway as PV source and output
> conductors, providing that they meet the requeriments of
> 300.3(C)."
> 
> Also, definition of "Solar Photovoltaic System" is "The
> total components and subsystems that, in combination,
> convert convert solar energy into electric energy suitable
> for connection to a utilization load."
> 
> That being said, I can agree that can make sense to keep
> the AC and DC separate, as long as it can be done cleanly.
> We don't often mix here in Tucson, but haven't ever had
> issues with an AHJ if we have needed to.
> 
> Best,
> Louis Woofenden
> 
> Net Zero Solar
> Tucson, AZ
> 
> Darryl Thayer wrote:
> > Sorry I differ with the comments, 690.4.B says'PV
> source and Output circuits shall not be combined with
> circuits of other systems.'  The PV is different from
> any AC system.  because they both feed the inverter it
> does not matter, same as a separately derived system.
> > Daryl
> > 
> > --- On Thu, 9/24/09, Drake Chamberlin <drake.chamberlin at redwoodalliance.org>
> wrote
> >   
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