Converting Вольты to Амперы
To convert напряжение to current, you need either power (ватты) or resistance (омы). This is because current depends on what load is connected to the напряжение source.
Using Мощность (Ватты)
I = P / V. A 1200W appliance on 120V draws: 1200 / 120 = 10 амперы.
Using Сопротивление (омы)
I = V / R (Ohm's Law). A 12Ω resistor on 120V draws: 120 / 12 = 10 амперы.