Charlie R Posted March 15, 2011 Report Share Posted March 15, 2011 If a garage or other out building has a secondary panel with a 3-wire feed and separate ground rod, no metallic path between the buildings where the primary and secondary panels are located, is there a distance requirement (minimum or maximum) between the primary and secondary panels, or is it between the buildings, or no distance issue at all? Thanks. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted March 15, 2011 Report Share Posted March 15, 2011 If a garage or other out building has a secondary panel with a 3-wire feed and separate ground rod, no metallic path between the buildings where the primary and secondary panels are located, is there a distance requirement (minimum or maximum) between the primary and secondary panels, or is it between the buildings, or no distance issue at all? Thanks. The distance is irrelevant. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
Charlie R Posted March 15, 2011 Author Report Share Posted March 15, 2011 Thanks Jim, I couldn't remember if, after some distance, you were required to have a separate ground or could still use a four-wire feed. The decision to use the four wire feed or three-wire with a separate ground is not distance driven, just preference? Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted March 15, 2011 Report Share Posted March 15, 2011 Thanks Jim, I couldn't remember if, after some distance, you were required to have a separate ground or could still use a four-wire feed. The decision to use the four wire feed or three-wire with a separate ground is not distance driven, just preference? I'm flying without references today, but I believe that pre-2008, the NEC allowed you to choose *if* there were no continuous metallic pathways between the buildings. As far as I know, post 2008 that choice is gone and you're supposed to run 4-wires to any building fed from the service regardless of distance. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
Charlie R Posted March 15, 2011 Author Report Share Posted March 15, 2011 Thanks Jim, I appreciate it. Quote Link to comment Share on other sites More sharing options...
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