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sparkyinak #208067 12/22/12 09:54 PM
Joined: Mar 2006
Posts: 82
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I always understood CEMF and back EMF to be the voltage spike in a circuit that is generated when an inductive coil or winding is opened and the field collapses. It is of opposite (counter) polarity of the applied voltage.

sparkyinak #208068 12/22/12 11:22 PM
Joined: Jun 2004
Posts: 1,273
T
Member
twh....

That was my first take...

Until mention of track lighting.

==========

Now, having re-read the OP for a third time:

Question: Is this a three-phase circuit?

Did you have the amp reading taken simultaneously?

( Current flow can easily change by 0.15 A over time, as the load heats up and resistance rises. )

Is your amp-meter as sophisticated as a T5-600/T5-1000 by Fluke?

In which case, exactly where and how a conductor is clamped can shift the apparent amperage drawn by such a trivial amount.

What kind of absolute amperage reading were you pulling?




Last edited by Tesla; 12/22/12 11:22 PM.

Tesla
sparkyinak #208069 12/22/12 11:46 PM
Joined: Jul 2004
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If I saw .15 a I would start looking for a leaky ballast or something. The same kind of thing that trips GFCIs


Greg Fretwell
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