A Perfick sine wave is the one thing you will not see;!...

And how exactly will you see how perfect or not perfect it is? Just
eyeball
it?
Heh heh, You are as bad as TurNiP

The only way to be absolutely sure is to get a piece of graph paper and
some
sine tables and draw your own.
And those tables were derived geometrically not by some stupid computer.
Similar geometry to that going on in an alternator.
And any non sinusiodal AC passed through inductors and capacitors,
gradually
gets to look more and more like a sine wave interestingly.




.

There are lot of distortions on the mains waveform.


Answer this question if you will. Have you got an Oscilloscope or not?..

No.


Well perhaps you should then you'll se what the mains really does look
like;!..
--
Tony Sayer