delta hi leg

[sparky59]

For a 120/240v delta hi leg system. The transformer diagrams show phase C as the hi leg. The conductors are required to pass through the meter with the hi leg on phase C. Why is the hi leg required to be on phase B in the distribution panel?

 

[jim dungar]

For a 120/240v delta hi leg system. The transformer diagrams show phase C as the hi leg. The conductors are required to pass through the meter with the hi leg on phase C. Why is the hi leg required to be on phase B in the distribution panel?

The "C" position is used by the utilities because it simplifies their meter design. The NEC requires the high leg to be landed on the "B" position of the premises wiring. This is probably based more on tradition than any other reason.

 

[don_resqcapt19]

While the utilities have you land the high leg in the C phase postition at the meter, it is actually B phase...at least it is with our local utility.

 

[charlie]

Where we have open wire secondary on poles, the top conductor is the neutral and the bottom conductor is the high phase, wild leg, or B? if the configuration is 120/240V, 3?, 4w. I don't know how other electric utilities do their configurations.