You have Line, Neutral and Ground be it 120V or 240V. Electrical potencial is always between L and N with current running from L to N. G is a safety bypass in case something goes wrong and L gets in contact with it be it a casing of a device, plumbing ... Finding yourself between will kill you if you don't have a FID circuit breaker installed right. L is the hot wire which you can check with electric phase/line tester. Finding yourself between L and N will also fry you no matter having FID installed or not. The electeical current in this case is limited by your 10A or 20A circuit breaker. FID has a triggering time of 0.5ms so you won't be harmed if touching a grouded part and L, but you will be killed touching for example L with one hand and N with the other, letting the current run through your heart and forcing it to run with mains frequency of 50/60Hz which will give you at least a decent heart attack if not boil your blood and cook your body from inside out.
Splitting 240V into 2X 120V isn't as simple as hanging each wire to one load and connect the other one somewhere in between. You need a transformer rated for sufficient power consumption.
So don't fuck with electricity if you don't know exactly what you're doing!
Keep it safe