[RE-wrenches] neutral sizing for sense

[Kirk Herander]

705.95 Ampacity of Neutral Conductor
National Electrical Code 2017 of New York State
<https://up.codes/viewer/new_york/nfpa-70-2017> > 7 Special Conditions
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/7/special-conditions#7>
 > 705 Interconnected Electric Power Production Sources
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/7/special-conditions#705>
 > 705.95 Ampacity of Neutral Conductor
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/7/special-conditions#705.95>
JUMP TO FULL CODE CHAPTER
The ampacity
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#ampacity> of
the neutral conductors
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#neutral_conductor>
shall
comply with either (A) or (B).

(A) Neutral Conductor for Single Phase, 2-Wire Inverter Output
If a single-phase, 2-wire
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/8/communications-systems#wire>
 inverter
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/6/special-equipment#inverter>
output
is connected to the neutral and one ungrounded
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#ungrounded>
conductor
(only) of a 3-wire
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/8/communications-systems#wire>
system
or of a 3-phase, 4-wire
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/8/communications-systems#wire>,
wye-connected system, the maximum load connected between the neutral and
any one ungrounded
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#ungrounded>
conductor
plus the inverter
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/6/special-equipment#inverter>
output
rating shall not exceed the ampacity
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#ampacity> of
the neutral conductor
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#neutral_conductor>
.

(B) Neutral Conductor for Instrumentation, Voltage, Detection or Phase
Detection
A conductor used solely for instrumentation, voltage
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#voltage_of_a_circuit>
detection,
or phase detection and connected to a single-phase or 3-phase interactive
inverter
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#interactive_inverter>,
shall be permitted to be sized at less than the ampacity
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#ampacity> of
the other current-carrying conductors and shall be sized equal to or larger
than the equipment grounding conductor
<https://up.codes/viewer/new_york/nfpa-70-2017/chapter/1/general#grounding_conductor_equipment_egc>
.

On Mon, Jan 24, 2022 at 11:58 AM Foxfire Energy <dan at foxfire-energy.com>
wrote:

> I’d start with the manufacturers recommendations
>
> Sent from my iPhone
>
> > On Jan 24, 2022, at 11:52 AM, jay <jay.peltz at gmail.com> wrote:
> >
> > HI All,
> >
> > Where do I find in the code how to size a sense only neutral wire for GT
> inverter.
> >
> > thanks
> >
> > jay
> >
> > peltz power
> >
> >
> > _______________________________________________
> > List sponsored by Redwood Alliance
> >
> > Pay optional member dues here: http://re-wrenches.org
> >
> > List Address: RE-wrenches at lists.re-wrenches.org
> >
> > Change listserver email address & settings:
> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> >
> > There are two list archives for searching. When one doesn't work, try
> the other:
> > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> >
> > List rules & etiquette:
> > http://www.re-wrenches.org/etiquette.htm
> >
> > Check out or update participant bios:
> > http://www.members.re-wrenches.org
> >
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>

-- 

*Kirk Herander / **kirkh at vermont.solar <kirkh at vermont.solar>*

*Owner|Principal, VT Solar, LLC*

*Celebrating our 31st Anniversary 1991-2022!!*

*www.vermont.solar*
<https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0>

dba Vermont Solar Engineering

802.863.1202
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20220124/34b9b561/attachment.htm>