It's still a good best practice to bond both ends in case of a fire if the conduit becomes separated in the middle it will still be bonded.
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Tuesday, July 15, 2014 1:47 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Concentrics at 250 volts plus Kelly: Just as I suspected. I wish you could be here to share the lunch I have earned on my bet. Thanks, William [Gradient Cap_mini] Lic 773985 millersolar.com<http://www.millersolar.com/> 805-438-5600 From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kelly Larson Sent: Monday, July 14, 2014 10:16 PM To: RE-wrenches Subject: Re: [RE-wrenches] Concentrics at 250 volts plus Hi William, The requirement for bonding on BOTH ends comes when the wire though the conduit is a GEC. For EGC, just one end of the conduit is sufficient. Blessings, Kelly ~~~~~ Kelly Larson 707-223-3209 Box 504 Ukiah, CA 95482 Electrical Engineer NABCEP Certified Solar PV Installation Professional IREC Certified Master Trainer for Photovoltaic Installer CA Electrical Contractor# 868189 SolarKelly.com<http://SolarKelly.com> On Jul 14, 2014, at 3:11 PM, William Miller wrote: Friends: Please help us settle a crew debate before we come to blows: for circuits 250 volts and higher, do we need to bond EMT at both ends? Or, if there is bonded cabinet with a concentric on one end and a solid, bonded metal cabinet on the other, do we need a bonding bushing on the concentric end? I say a conduit needs to be bonded only on one end. My misguided employee says both ends. Both cabinets are independently bonded. Thanks in advance. William Miller Solar _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm<http://www.re-wrenches.org/etiquette.htm> Check out or update participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org>
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