Single Phase Motor

[Joethemechanic]

That one is definitely a rarity... most have 30 amp fuses regardless of the load and wire size

Unless somebody put one of these things in it

 

[Jraef]

So whenever you have single phase you would never have 3 phase conductors obviously but either one or two phase conductors? But when using a disconnect you would never have only one phase conductor?

So no matter what, you must always have at least two CONDUCTORS to have a complete CIRCUIT for electricity to flow. When you have single PHASE, the two conductors can be either line to neutral, or line to line. Either way, we still call it single phase because there is only one AC sine wave making current flow to the load. When you have 3 phase, you have three separate single phase circuits that are making current flow to the load: A to B, B to C and C to A. Each one of those taken individually would be a single phase, together they are 3 phase. You can ALSO have 3 phases plus a neutral, in which you still have 3 individual single phase circuits, but at different voltages. So if you have 208V 3 phase, line to line will be 208V, but line to neutral will be 120V.

Forget 2 phase; it exists in a few remaining pockets, but is functionally irrelevant now. There is no point in wasting any brain power on it unless you are interested in the historical aspects, or you are planning on working in downtown Philadelphia or the Niagara Falls area.

 

[Alwayslearningelec]

Thank you very much everybody