We have had success in many cases, contacting the manufacturer of the installed breaker and asking if the device was suitable for backfeeding (ala solar). Some will certify that it is OK, some do not.
Glenn Burt -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Hans Frederickson Sent: Friday, March 25, 2011 1:16 PM To: 'RE-wrenches' Subject: [RE-wrenches] Backfeeding GFP devices Wrenches, I'm looking at a fair number of school projects these days. So far, every school service I've looked at has a ground fault protection device at the main service disconnect. I just completed a 75kW school project where we did a line side tap. The panel gear was old, maybe 1960s Federal Pacific. Lately, I've been looking at schools with newer gear. In SolarPro 2.4, the "Can We Land?" article mentions the possibility of getting a GFP device that is capable of being backfed. Has anyone seen or used such a device in conjunction with a big service? Are there any known manufacturers of GFP devices that are listed for backfeeding? For a current project, I would like to backfeed a GFP device that is controlling a 3000A switch on a 480V service. Also, because I'm a curious person, I'm wondering if anyone has ever backfed a GFP device not listed for that use, perhaps without realizing it, and what the result was? Thanks, -Hans Hans Frederickson Estimator / Project Manager Frederickson Electric, Inc. (360) 385-1395 _______________________________________________ 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 _______________________________________________ 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
