Single phase vs 3 phase

[Shadow_Storm56]

Anyone here know much about motors and that stuff? I know it's way off topic but why not try ? 

[DragonTamer1]

What's the question?

[Shadow_Storm56]

5 hours ago, DragonTamer1 said:

What's the question?

I know 3 phase is more efficent than single phase but how odd is it for a single phase 1hp motor to be drawing 1200w or close to 5 amps when it's running with no load, just a pully. I assume this is bad. 

[IvIast3r]

5 hours ago, Shadow_Storm56 said:

I know 3 phase is more efficent than single phase but how odd is it for a single phase 1hp motor to be drawing 1200w or close to 5 amps when it's running with no load, just a pully. I assume this is bad. 

https://www.rm-electrical.com/technical/motor-motor-current-charts/ that should help, note tho this is a generalization, all motors are built differently and have different power factors

[DragonTamer1]

6 hours ago, Shadow_Storm56 said:

I know 3 phase is more efficent than single phase but how odd is it for a single phase 1hp motor to be drawing 1200w or close to 5 amps when it's running with no load, just a pully. I assume this is bad. 

Without being able to work with the motor hands on, it is hard to tell. 5 amps is not a terribly high amount. I would be more concerned about the load current. For most motors, freewheeling current is close to load current.

 

See if you can find a datasheet for your motorz it should tell you what kind of power it should be drawing.