Jeff, An oldie but attached tech note explains. May Need to upsize G / N for voltage drop depending on run…
Best regards, Lloyd Lloyd Hoffstatter Sunstruck Consulting Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 ________________________________ From: RE-wrenches <[email protected]> on behalf of Jeff Clearwater <[email protected]> Sent: Wednesday, November 13, 2019 12:00:37 PM To: RE-wrenches <[email protected]> Subject: [RE-wrenches] 705.95(B) and Sunny Boys - current on Neutral? Hey Folks, So does anyone have a reference I can show my AJH as to whether there is any current on the neutral of a single phase 240 VAC SB 7.7-40 inverter? 705.95(B) states: Neutral Conductor for Instrumentation, Voltage Detection or Phase Detection. A conductor used solely for instrumentation, voltage detection, or phase detection and connected to a single-phase or 3-phase utility-interactive inverter, shall be permitted to be sized at less than the ampacity of the other current-carrying conductors and shall be sized equal to or larger than the equipment grounding conductor. Be great not have to run 3/0 wire to my dedicated PV subpanel with 5 SB7.7s. At 200 Amps I could use 6 AWG according to 705.95. A huge savings in wire pull hassle not to mention copper. Are there any other practical considerations for those SBs to operate well if I were to go that low with the neutral? Anybody have any field experience with AJHs on this? Thanks, Jeff ~~~~~~~~~~~ Jeff Clearwater Village Power Design linkedin<https://www.linkedin.com/in/jeff-clearwater-0622a312/> www.villagepowerdesign.com<http://www.villagepowerdesign.com> cell - 413-559-9763 ~~~~~~~~~~~~~~~~~~~~~~~
Neutral Conductor Size for Sunny Boy Inverters_v2 (1).pdf
Description: Neutral Conductor Size for Sunny Boy Inverters_v2 (1).pdf
_______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
