In a 3 Phase service I have seen 240v between phases and a 208 to ground wild leg, What are some other combinations and where do they use the wild leg?
The Golden Rule - "The man with the gold makes the rule"
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Alda, The wild leg is ONLY useful in configurations that do not require a neutral, such as 3 phase equipment, or 240 volt loads with no neutral, otherwise you burn it up.
You ONLY have a high leg in Delta systems (open or closed) because you tap mid phase of one coil (between A and C)
That's why the Wye is the popular form today, it creates no high leg and all 3 phases are useful with the neutral.
You often see 199 volt high legs, this is from 230 volt systems. Phase to ground voltage of A or C phase X 1.732 = phase to B voltage.
Thanks for the answers, Bill great transformer drawings, but still not sure where they are used. On a 3ph system 240v between phases and measuring "120v to grd, 120v to gnd, and 208 to gnd", where would the 208v to gnd be used?
The Golden Rule - "The man with the gold makes the rule"
Re: Wild Leg#11950 08/04/0207:20 AM08/04/0207:20 AM