Why your home’s (120v 15 circuit) does not overload tools that only use 1 amp, 2 amps, 3 amps (etc. anything less than the 15)?

Question

For example if I connect a 90v motor to a 120v battery source doesn’t that overheat and blow my motor?

Why is it though when it’s 120v from the wall then the motor is still fine?

In: Engineering

Answer 1

When given the correct **voltage**, a properly functioning electrical device will determine, by itself, how much **current** to draw.

A device on a 15A circuit will determine on its own how many amps to draw (up to 15). A 90V motor hooked up to 120V isn’t the correct voltage, so all bets are off. Therefore, there’s no contradiction.