Would need to see the motor data plate to be 100% certain, but NO moving the wire will not work.

You need to reverse the connections to the start winding. Only one end of this winding is visible in your photo, the grey wire connected to terminal "A" . The problem is that the other end is inside the motor somewhere. You will have to dissasemble the motor and investigate. Even then it may be buried in the winding and unreachable.

EDIT: As a general rule to reverse any type of electric motor electrically you need to swap or move TWO connections. One noticable exception is some special motors that have two sets of windings, one for each direction. These were / are used in valve actuators and the like.

Robert G8RPI.

Edited By Robert Atkinson 2 on 04/07/2022 21:07:18

Edited By Robert Atkinson 2 on 04/07/2022 21:17:14

That's not actually correct, you can reverse a Parvalyx motor by just swapping the live from one connection to another. When I get home I'll find the diagram and post a link. Can't work out how to do this on a phone.

It may not apply to the motor in the photo, but sometimes the shaft and end plates can be swapped on the frame (ie the windings reversed with respect to everything else). The shaft then projects the other way, and thus rotation is reversed. Usually works for shaded pole motors.

Edited By Macolm on 04/07/2022 22:13:19

https://www.model-engineer.co.uk/forums/postings.asp?th=133409

**LINK**

Agree with Duncan changing the live from B to A will reverse the motor as per Parvalux.

Emgee

Edited By Emgee on 04/07/2022 23:25:51

I think the answer is NO. You would be very fortunate to locate the common connection, experience is what is needed here, also you say there isn't a name plate so is the motor RPM going to OK . To locate the common connection you will need an ohmmeter, your motor will have a higher resistance for the start winding and much lower for the run, maybe around 6-8 ohms. Leave well alone, at the moment you have a useful motor but might finish up with a scrap one. Parvalux three lead AC motors are altogether different both windings have the same resistance. John.

The difference is if it is a capacitor start or capacitor run motor and the parameters of the windings. I admit I had forgotten about the parvalux style. These are capacitor run with identical windings and can be reversed. Most capacitor run motors don't have equal windings so need two wires swapped.
The OP's motor appears to be capacitor start. This is based on the physical desgn and size of the capacitor, so is just an educated guess. If capacitor start then agin two wires to reverse.
A resistance measurement between the 3 connections might give a clue if it is capacitor run or start or even if windings are the same. If the resistance between A and B is different to the resistance between B and C it cannot be a balanced capacitor run motor. If they are the same it might be, but even then it's not 100%, the inductance of the two windings would have to be measured to be sure.

With no information just moving the wire has a risk of letting the magic smoke out.

Robert G8RPI.

You can check if it is capacitor start rather than capacitor run. Connect a voltmeter across the cap and start the motor. If it is cap start you'll get a voltage which very quickly disappears as the centrifugal switch opens, if it's cap run the voltage will persist.

The lamp limiter as it is know as in the repair trade and as described by Malcolm above, is a very simple and useful electric test gadget, well worth making. For mine I have 4 BROWN batten lamp holders mounted on a length of wood, 13 amp plug and lead one end, 13 amp socket outlet and three terminal the other for the load so that I can insert an ammeter, all covered by a bit of stainless steel mesh over the bulbs to let the heat out and to stop the bulbs from being broken. These Gadgets were well know in the radio, tv rand electrical repair trade in the 50', simple and reliable. John

SOD said

"The reason I don't think swapping the capacitor will reverse the motor is that the start of the two windings, marked by solid filled triangles, isn't changed by moving the live connection, so current still flows in the same direction in both coils. As moving the capacitor doesn't change the direction of the current, I think the magnetic fields flow in the same direction, albeit the phase is different. Therefore I expect the motor to rotate in the same direction, and possibly be reluctant to start. "

The capcitor introduces a 90 degree phase shift in the current. Thus moving the live reverses the phase relationship between the two windings and the motor WILL reverse direction.

The problem is the capacitor also introduces an impedance in series with the winding. Depending on the detail design of the motor, which we do not know, the windings may or may not be different to compensate for this. If the windings are different then the currents will be outside the design parameters which may or may not cause damage or / and poor performance. Motors DESIGNED to be reversed with just a single wire cange to different sides of a capacitor will have identical windings. This however introduces compromises, the windings are likely to use thicker wire and be heavier and costlier. Performance is likely to be reduced compared to a single direction motor.

Question for OP, are there any markings on the capacitor? What are they?