I'm building a machine to help me manufacture some optical components more quickly. The machine will be powered by a plain old, "boring" 1/4 HP motor, like the ones used for various household appliances. I actually bought this one:
The product description says: "split phase motor, 5.4 amps, 60 hertz, auto protector". The page title in case the link is dead: "A.O. Smith GF2024 1/4 hp, 1725 RPM, 115 volts, 48/56 Frame, ODP, Sleeve Bearing Belt Drive Blower Motor".
How would you choose the circuit breaker for this thing? I assume it will have to support a current larger than the stated 5.4 amps, because there's an initial shock when you power it on.
For extra safety I would prefer a 2 pole breaker. The optical items are coated with some water-based fluid during processing and, while there's no chance for the fluid to reach the inside of the box, where the motor is, I am very much in favor of taking additional safety measures whenever it's reasonably possible.