
could one of our continental cousins have a look at their kettle assuming they use 110/120 volts AC and see how many watts it,s rated at
You won't find anyone on the continent using 110v I'm afraid - you'll be needing to look over the Atlantic.
Interesting question though, why do you ask?
I'd imagine they'd be the same wattage as over here in order to boil the water in the same time. With half the voltage that would mean twice
the current though (getting on for 20 amps or so) and I don't know if 110v systems are generally rated this high or not. If not I guess they just
have to put up with less watts and have to wait longer for their tea 
When I lived in Canada I remember the kettles taking forever to boil. Can't get enough amps into them as ^^^^.
Can't remember what wattage they use... but Mr Amazon suggests 1500watt normally with 1750watt being about as big as you can go.
http://www.amazon.com/T-fal-BF6520004-Vitesse-Electric-Kettle/dp/B000EZU678
ive got a 120v genny attached to a peice of plant,just want to know if i could make a cuppa from the outputs whilst on site
Yes but not a quick one seems to be the answer Jon 
If you can't get a 110v one, a 240v may work but will take twice as long to boil. It will draw half its rated power though which may be useful if your genny is not up to putting out 2000w.
oh well,have to have it it simmering all day long