IF the nomenclature plate on a piece of 220VAC equipment says 10.0 Amps, does that mean that the load is 10 amps per leg, or 10 amps total, therefore 5 per leg?
If you put a current meter one leg, it reads 10A; if you put it on the other leg, it also reads 10A. But that does NOT mean there is "20A" in the circuit. The current in the two wires is not additive. Current flows from one point to another through the CIRCUIT, and the circuit consists of those two wires.
The confusion is not the amperage. The confusion is how much power do you have. For the record a 10A 220V circuit will have a minimum 10A/2 pole Breaker.
In the USA a 110v, 10A circuit will pull 1100VA. A 220v 10A circuit will pull 2200VA, twice as much power as the 110v circuit. Technically on a 220v that is connected to 2 phases there is no return. That's as simple as I can make it for a DIY'er. Otherwise we need to get into a course on phase relationships.
10A in one hot, 10A out the other hot
A 240V-only piece of gear connects to two hot legs and a ground (no neutral), so if it pulls 10A, that 10A has to be going in one hot leg and out the other hot leg -- there's nowhere else for it to go! (In other words, it draws 10A, period -- the legs do not "add together".)