The 110 volt we use on site is actually "centre-tapped 110 volt" - so if you measure each leg to earth it reads +55 volt on one leg and on the otrher it will read -55v (which gives a difference of 110 volts). The principle is that if you ever grab one live wire by accident you only get a 55 volt belt off it which is a lot less likely to kill you than a 230 volt shock...
Not that I'm keen on trying it out in person
A couple of other things about mitre saws - it is safer and physically less stressful to use them on a bench or on top of trestles (I have screwed one onto an old flush door supported on piles on Thermalite blocks before now), and without exception they generate a lot of dust, even when attached to a vacuum cleaner, Even the very best of them, the Festool Kapex, is really only so-so in this respect, so mask wearing when using them is advisable