Can I connect a washing machine to a 15A extension cable?
125x15 = 1875 W
220x15 = 3300 W
it turns out at 220V more power or am I mistaken? Will the washing machine pull 2300 watts 10A?
The question is not clear, you yourself wrote the answer. Yes, 220 more power, in extension cords, switches, connectors, the main role is played by the maximum current, you have 15A. Power equals the product of voltage and current. If the machine 220V - pull, if 125V - no. Rephrase - - pull.