On this PFC cap for NST

["Tyler Steineckert" <tsgeoman-at-uswest-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Im a little confused.
These are the silver Start caps for motors??????
They go before the NST. inbetween the wall power and the NST?????
Are these in parellel or in series???????
Does it affect the output power on the NST or the TC.   Better or worse.  Or
does it simply reduce the power draw on your line keeping your bill lower?
Im assume that if there is no affect on output power, and it reduces the
amount of power that your house, or whatever, has to put out.  Anyone that
uses a NST should be using these caps.
Just some thoughts.