When you run long runs of DC conductors with the positive and negative separated by several inches or more, its not "eddy currents" that are a problem as these are generated by AC fields around a wire, its that you are creating a very long "capacitor". Two long copper conductors separated by a large gap is how to make a capacitor and this can cause a reverse field against the flow of current in each cable. These reverse fields cancel each other out when the two conductors are run very close together.
When we have long runs of positive and negative cables in a ditch from a remote pole mounted array, we always "twist the cables around each other if not too large, or use cable ties every few feet for the larger cables to keep them from being separated when back-filled.
Jeff Yago
DTI Solar
Netscape. Just the Net You Need.
_______________________________________________ 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
