Dear, let me check something with you, is the direction of the way clamp is installed on the power cable relevant? I was sure it was not. But from the measurements of the very same cable with 3 clamps I now see that the clamps have to be installed in one direction in order give the same results.
When opened the clamp has K and L leters printed on the inside. If K is toward the power plant and L toward the 100W bulb it gives probable 93-95W readout, if I connect the clamp other way round it will only show 79-80W.
This is quite crucial difference and that is not shown on the step3 of the installation manual!
Or did I mess something up?
Maciej
It shouldn't make any difference as it is AC current. (On single phase)
Bazzle