Great info, Burt. The Greaves ³Shoo-pin² is another product that crimps to the end of highly stranded cable, like the Cobra X-flex, resulting in a terminal that is suitable for landing on lugs like those in the Sunny Island that are not listed for use with fine stranded cables. Here is a link:
www.greaves-usa.com/ On 3/11/09 3:20 PM, "Glenn Burt" <[email protected]> wrote: > Hi Jeff, > > Mr. Wiles strongly suggests that welding cable not be used for battery > connections. You can read up on his guidance here: > http://www.nmsu.edu/~tdi/Photovoltaics/Codes-Stds/PVnecSugPract.html > > Something the NEC is clear about is conductors be used that are listed for > that purpose. Welding cable is not usually listed for battery connections. > We too have researched the subject and selected Cobra X-flex when we need very > flexible conductors - such as for battery interconnections. This cable is > listed by UL to MTW / THW with a flame rating of VW-1, in the sizes we use of > 1/0 & 2/0. > > You will need to perform additional research to locate suitable lugs rated for > fine stranded wire, and identify a crimping tool that is approved by the > manufacturer fro use with the lugs you select. We selected a Burndy > YAG26LTC38LD lug to use on 2/0 X-Flex on the ends to mate with our AGM > batteries (3/8" SS bolts). > > Conductors and their approved terminals are rated in a Class system, > indicating the number of strands of a size wire, that make up the cable. For > example one manufacturer I looked at had the following information: > 1/0 conductor > Class B = 19 strands > Class C = 37 strands > Class M (welding) = 2846 > > Additionally, if you plan to use the fine strand conductor to land on any > terminals, be sure the manufacturer approves of this. We found out during an > installation that the SMA Sunny Island will not accept the fine stranded > conductor we had planned to use to accommodate the conduit run, and had to > make a decision to 1) redesign the conduit run to accept a class B THWN cable > (tough to bend) or 2) locate and procure a pin terminal adapter that crimps on > the X-Flex to adapt it to the manufacturer's recommendation (Ilsco is a source > of these). > > I chose the former due to availability - after many calls, the only sources I > could locate of the appropriate adapter had many weeks as lead times. > > Hope this helps! > > -Glenn Burt > > > From: [email protected] > [mailto:[email protected]] On Behalf Of Jeff Blick > Sent: Wednesday, March 11, 2009 9:59 AM > To: [email protected] > Subject: [RE-wrenches] battery cables > > Hi wrenches, > I have been looking through the codebook for guidance in selecting battery > cables for a large UPS system. The code doesn¹t appear to have much to say > about the actual type of wire used. My electrical supplier is suggesting > welding cable, but I feel like I read somewhere that welding cable is not > appropriate. I know it needs to be 4/0 or larger, just wondering what type of > wire others are using for this application. Thanks! > > Jeff Blick > Lead PV Installer > Sunlight Solar Energy, Inc. > direct: 541-306-4196 > fax: 541-322-1911 > [email protected] > www.sunlightsolar.com <http://www.sunlightsolar.com> > This e-mail, and any attachments thereto, is intended only for use by the > addressee(s) named herein and may contain legally privileged and/or > confidential information. Any unauthorized review, use, disclosure or > distribution is prohibited. If you have received this e-mail in error, please > notify me by replying to this message and delete the original, any copy of > this e-mail and any print out made. > > For additional information about Sunlight Solar Energy please refer to our > website at http://www.sunlightsolar.co > <blocked::http://www.sunlightsolar.com/> > > > > <http://msgtag.com/?source=ffooter> has notified the sender that this > message has been received. > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > 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 > > > David Brearley, Technical Editor > SolarPro magazine > NABCEP Certified PV Installer > [email protected] > Direct: 541.261.6545 > Fax: 541.512.0343 > > Visit our Web site at solarprofessional.com
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