[RE-wrenches] 2014 NEC AFCI

jay peltz jay at asis.com
Wed May 28 08:14:52 PDT 2014


Hi Kirk

I thought about that, but you'll still need it on for the 5 minute clock. 
If Nick is right and no voltage is acceptable on output side, then I don't see how even with relays etc to get it to work?

Jay
Peltz power







> On May 28, 2014, at 7:32 AM, "Kirk Herander" <kirk at vtsolar.com> wrote:
> 
> Sounds like you need the load side of the AFCI to disconnect from the grid if it trips. So you could have a power relay between grid and load side of the AFCI, the relay coil energized from the line side of the AFCI, i.e. the Enphase panel the AFCI is plugged into. So if it trips, power is lost on the Enphase panel buss, and the load side relay opens, disconnecting the AFCI from the grid.
> So no grid power on load side of AFCI when open. Acceptable?
>  
> Kirk Herander
> VT Solar, LLC
> Un-Common PV since 1991
> www.vermontsolarnow.com
> dba Vermont Solar Engineering
> NABCEPTM Inaugural Certificant
> VT RE Incentive Program Partner
> 802.863.1202
>  
> From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Nick Soleil
> Sent: Tuesday, May 27, 2014 12:01 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] 2014 NEC
>  
> Hi Jay,
> 
> It is not acceptable to wire the AFCI breaker with the utility power on the output of the AFCI breaker.  That does not meet the specifications for the AFCI breakers.  These breakers are sensitive to having voltage on their output when the breaker is opened, which can damage the AFCI breakers.
> 
> Currently, there are no AFCI circuit breakers that are listed for back-feed.
>  
> 
> On Tue, May 20, 2014 at 8:10 AM, jay peltz <jay at asis.com> wrote:
> HI Will,
>  
> You can do this.
>  
> Take a standard breaker panel, install a Arc fault and run the wiring from the enphase like it is the grid: ie into the main lugs.
> Then this will go out through the breaker in the correct fashion, and onto the main panel.
>  
> jay
>  
> peltz power
>  
> PS as to the code, they want it this way
>  
>  
> On May 20, 2014, at 7:59 AM, Will White wrote:
>  
> Wrenches,
>  
> Is anyone else having problems with inspectors and the 2014 NEC?  In Mass we’re having all kinds of issues with inspectors requiring/allowing an array of different things for 690.12 rapid shut down ranging from roof top disconnects, disconnects on the side of a house 20’ up, disconnects in attics, or only disconnects that can be activated on the ground.  It varies between inspectors.
>  
> We’re also having problems with one inspector requiring arc fault breakers on Enphase even though there are no UL listed arc fault breakers that can be back fed or he wants us to run the trunk cable in a raceway. 
>  
> It’s getting very difficult to install in Mass.
>  
> Thanks,
> Will
>  
> Will White
> Operations Manager - New England
> RGS Energy
> 64 Main St. |Montpelier, VT 05602
> tel 802.223.7804 | mobile 802.234.3167 | fax 802.223.8980
> RGSEnergy.com | william.white at rgsenergy.com
>  
>  
>  
>  
>  
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