Kirk, Notaguru or a gutter, but it sounds good to me.
Dick Ratico Solarwind Electric --- You wrote: Hello transformer gurus, I am in the middle of a good sized PV job and we need to use a 75 kva 480/208 3 phase transformer (standard delta to wye) to connect the 208 3 phase output to the building service 480. So the transformer/PV constitutes a separately derived system. The OEM's transformer wiring diagram is vague but is prewired for H1,2,3 inputs and X0 - x4 outputs at 208. I think I got this right: the 480 primary feeder neutral is not used, primary gnd goes to xformer equipment gnd, secondary 208 neutral is created on secondary X0, secondary X0 is bonded to equipment gnd, and the 208 gnd originates at the equipment gnd terminal. And a GEC must travel from xformer gnd terminal to a code-approved grounding electrode (rod, building steel, etc). I am gleaning some of this from a Mike Holt article, just want to make sure I'm not missing anything obvious. Thanks. Kirk Herander VT Solar, LLC --- end of quote --- _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
