A Reply from: Mike Holt stated:
Kevin, the utility DOES connect the primary neutral to the secondary neutral at every transformer that has a neutral. Just check out the transformers at any pole in any community in the USA.
Reply to Mike Holt
Mike-
Your above reply is all inclusive and NOT correct. It is true for all areas that use multigrounded neutral distribution systems. However, there are some areas that use a delta secondary at the substation with no neutral used in the distribution system, just three phase conductors. In other distribution systems transformers are connected on the primary phase-to-phase and have two primary phase terminals and no primary neutral connection, thus there is no neutral current flow on the distribution system to enter the earth.
In the dairy areas of California the multigrounded neutral distribution system is NOT used and the cows are happy – See TV commercials – Happy cows. In the areas without multigrounded neutral distribution systems there are NO problems with stray current or shocking swimming pools or shocking hot tubs or shocking showers from stray current flowing uncontrolled over the earth. Only in NORTH AMERICA is the bastardized multigrounded neutral distribution system used in the majority of the areas. NOT in all areas though.
Donald W. Zipse, P.E.
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