Joel, Here's a "blast from the past". http://lists.re-wrenches.org/htdig.cgi/re-wrenches-re-wrenches.org/2005/016854.h tml
It's pasted in below: Kelly, When Richard Perez and I were doing measurements on EMF fields with our homemade Gaussmeters years ago, we found the largest source of EMF came from the inverter/Battery cables. Makes sense as there is some heavy amperage switching going on. Twisting the cables together helped some, but the best cure was distance. At a bit over six feet away from the cables, we were almost at background readings. The moral of that story is: Don't put the inverter under the bed, or if you must-put it at the foot rather than the head. Allan S. is correct for the ac wiring as well. Twisting the conductors-but not the ground wire helped. Putting the whole shebang in EMT or metal flex really did the job. Bob-O >Hi all, > >Does anyone have experience in applying EMF mitigation >to inverter installation? Other than moving the >inverter, are there other ways you've found to lessen >or move the fields, Maybe using shielding films or >such? And since those shields only affect magnetic >fields, what about the remaining electrc fields? > >Thank you all for sharing your experience! > >Kelly Larson Regards, Dick --- You wrote: Please correct me if I am wrong, but I thought that twisting wires creates a magnetic field and increases radio frequency interference. ----- Original Message ----- From: "Richard L Ratico" <richard.l.rat...@valley.net> To: <re-wrenches@lists.re-wrenches.org> Sent: Friday, March 27, 2009 6:28 AM Subject: Re: [RE-wrenches] Odd Outback FNDC/Mate issue > 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 --- 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
