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Originally Posted by tkrussell

Their point is that pure resistance will create a PF of 1, and the power will be rated in watts. And impedance, while assuming an inductive or capacitive load in an AC circuit, will result in a PF of less than 1 for an inductive load, and greater than 1 for a capacitive load.

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PF cannot be greater than 1, based on the formula P = VIcos(theta); cos(theta) which is the power factor.

Cos(theta) cannot be bigger than 1.

You can use the terms leading and lagging.