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

A 15 Amp circuit doesn’t mean that it always has 15 amps flowing through it, it means it’s designed to safely withstand up to 15 amps.

The device using the electricity is what determines how many amps are flowing, if for some reason the combine load of all the devices on a circuit would exceed 15 amps the breaker would trip to protect the wiring in the building.