7 lead single phase motor

[wireday]

wiring a single phase motor that has 7 leads. P is line only, 2-8-3 get tied together, 5-2-4 get tied together with line. My question is does it matter which line connection is the hot or neutral for the line connections? I had one come into the shop with the hot on 5-2-4 and the neutral on P1.Thanks

 

[Smart $]

Shouldn't matter. Single phase is still single phase when connections are flopped. Now if the instructions or nameplate indicate it has to be connected a certain way, then to flop connections would be at the very least a violation of 110.3(B)... :angel:

 

[wireday]

Thanks for the reply,I will take a look but believe it said line-line.

 

[Smart $]

Thanks for the reply,I will take a look but believe it said line-line.

If it says line-line, and your line to neutral is the correct voltage, you can connect your line and neutral either way.

 

[ActionDave]

It makes no difference to the motor. Sometimes there will be a label that says L1 and N, yours should say L1, L2 because it can be wired 120V or 240V.

 

[kwired]

wiring a single phase motor that has 7 leads. P is line only, 2-8-3 get tied together, 5-2-4 get tied together with line. My question is does it matter which line connection is the hot or neutral for the line connections? I had one come into the shop with the hot on 5-2-4 and the neutral on P1.Thanks

Will work either way on incoming power leads. Motor only cares that it sees right voltage and don't care what if any lead is grounded.

You must have some wrong info in the connections though, you can not have lead 2 in two separate groups of leads that get tied together.

 

[Smart $]

If it's a seven lead motor why is there a #8 lead? What happened to #6 and #7?

 

[kwired]

If it's a seven lead motor why is there a #8 lead?

5 and 8 are pretty standard for the aux winding on single phase induction motors. Even 4 lead motors often have leads 1,4,5 and 8.

 

[K8MHZ]

If it's a seven lead motor why is there a #8 lead? What happened to #6 and #7?

I'll bet t's actually a 6 lead motor with a ground wire.

 

[K8MHZ]

 

[ActionDave]

Interesting thing about that diagram - it is SOP to swap 5 and 8 to change direction on a single phase motor, however if the motor is hooked up 240V as shown all one need do is move 5 over to L1 and the motor will reverse. It makes for easier hook up to a reversing switch.

 

[Smart $]

Interesting.

Diagram on left shows a #8 and no #6. Connection diagrams on right show a #6 and no #8.

 

[K8MHZ]

Interesting.

Diagram on left shows a #8 and no #6. Connection diagrams on right show a #6 and no #8.

The diagram on the right doesn't make sense to me, either. It was part of the image. It may be terminal connections for something else, the diagram on the left is the one I am used to.

 

[kwired]

I'll bet t's actually a 6 lead motor with a ground wire.

6 lead motor with integral thermal protector will have T1 factory connected to the thermal protector but then there is P1 and P2 from the thermal protector and you have 7 leads that must be connected up.

The diagram on the right doesn't make sense to me, either. It was part of the image. It may be terminal connections for something else, the diagram on the left is the one I am used to.

Looks to me like the right side of the image is basically just a drum switch schematic, the numbers are switch terminals- it don't show how to connect the motor to the switch though, just the function of the switch.