ECN Forum Forums General Topics of the Trade General Discussion Area Little League Baseball Field

Tom,
Frank said he has 22 fixtures, not 44.

Ed

Ed,
What Tom did is put fixture 1 on phases A&B, fixture 2 on B&C, fixture 3 on A&C, and so on. This will give you 15 connections to A and B and 14 connections to C.
Don

The current drawn by a fixture on phases A and B is not "in phase with" the current drawn by a fixture on phases B and C. They won't both be at "maximum" at the same time. They add, but it would be vectorially.

That's why I would recommend the volt-amp calculation.

ED

[This message has been edited by electric-ed (edited 09-12-2002).]

Ed,

I don't quite see the point about about fixtures on A & B not being in phase with fixtures on B & C. The load on B phase will be twice the load on either A or C phase if you have one fixture connected A&B and one fixture connected B&C.

Working with volt-amps may be meaningful for calculating a transformer load, but in this case, I think the higher number is the correct one to use.

The use of amps in the calculation may be a code requirement if I'm reading things right. In the following order 220.10, 220.3(B)(2) .

Of course, I could be just plain stubborn here, after all, that's in the job description of "electrician."

Tom

[This message has been edited by Tom (edited 09-13-2002).]