Actually, the mech regulators will work with EITHER ground polarity, although POSSIBLY not for as LONG if the system polarity is not what the regulator is designed for.
It has to do with the choice of metals for the relay contacts, putting the better more $$$ metal on the contact that is more prone to erosion when used at a certain polarity.
I'd almost bet, with a regulator bought today, from the "land of almost right" they cut corners in that respect, as well.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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