Drake, I believe that is for a single phase 2 wire output only. I am assuming one hot and one neutral for the inverter output in this case. I would think most *grid tied* inverters fall under 705.95B, where the neutral is only a voltage sense and can be sized as small as the equipment ground. Cheers, Dave
On Tue, Jan 25, 2022, 8:37 AM <[email protected]> wrote: > "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> > ." > > > So the neutral conductor is supposed to be sized for the connected load > plus the entire maximum output of the inverter? > --- > > > > On 2022-01-24 12:10, Kirk Herander wrote: > > 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 > <#m_3695074346584270383_NOP> > > 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 <#m_3695074346584270383_NOP> > > 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 <[email protected]> > wrote: > > I'd start with the manufacturers recommendations > > Sent from my iPhone > > > On Jan 24, 2022, at 11:52 AM, jay <[email protected]> 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: [email protected] > > > > 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/[email protected]/ > > 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: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. 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