Hi Dick, I used the twisted pair that comes with the FNDC. I believe it is rated for 600 v. I did, early on, pull the wires through the conduit for the aforementioned reason, but this is the only installation that I had trouble with in this fashion - perhaps it was because all the others were 48 vDC battery banks. More recently I've shifted over to going straight to the Buss bars in the FW box. The Outback engineers couldn't come up with a simple answer to why the battery cable fields caused the Mate or hub to entirely shut off given the topology of the system. At this point they are not going to look into it further...
Thanks, Howie -- Howie Michaelson NABCEP Certified Solar PV Installer™ Sun Catcher, LLC Renewable Energy Systems Sales and Service VT Solar & Wind Incentive Program Partner http://www.SunCatcherVT.com (cell) 802-272-0004 (home) 802-439-6096 On Fri, March 27, 2009 9:28 am, [email protected] (Richard L Ratico) wrote: > Howie, > > Very high, rapidly fluctuating, DC currents are carried by battery cables. > These > produce powerful, local magnetic fields. Many sources recommend twisting > the > cables together to reduce RFI. I have found this twisting hard to do well. > Steel > conduit accomplishes the same thing, more effectively. Resist the > temptation to > put any other wiring in that conduit. This would most likely be a code > violation > in any case; wires of different voltage ratings in the same conduit are > generally prohibited. > > Dick > > Dick Ratico > Solarwind Electric > > --- You wrote: > Outback has now determined that somehow this induced current from the > battery cables into the voltage sensing wires for the FNDC can cause the > communication system to get overwhelmed, but they are not quite sure how. > None-the-less, as of this week, they are recommending to run the FNDC > voltage sensing wires (plus and minus) *not* along side the inverter > cables. > > Hopefully, this is the end of this story... > > Has anyone experienced any similar symptoms? This seems a first for OB, > but I thought I'd ask here. > --- end of quote --- > > _______________________________________________ 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
