On 12/27/2015 01:32 AM, John Kasunich wrote: [snip] > John T has already responded with the specifics of his situation. Some > more background on US residential power: > > The transformer is typically mounted on a pole and serves several houses. > The neutral is connected to a ground rod at the base of the pole. There > are three wires from the pole to each house - L1, L2, and Neutral (no ground). > > Each house has a ground rod. The neutral from the transformer, the > house ground rod, a connection from the house cold water plumbing (if > copper), the neutrals from all the receptacles, and the ground wires from > all the receptacles are all tied together at a large bus bar in the main > panel. > > Other than the tie point in the main panel, neutral and ground are kept > separated throughout the rest of the building, including through any sub- > panels in garages, etc.
Thanks for the datails. My misconception was in not knowing that the power used a two-phase system (180 degrees shift). That info put it together. The rest of the connections (earth and neutral) seem very much like waht we see in Europe. Some countries you can assume that Earth and Neutral have the same potential, whereas others do not. Therefore, I always learned to assume they are at different potential. The reason to have both is always the same, regardless the system used. -- Greetings Bertho (disclaimers are disclaimed) ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
