Capacitor/motor connections

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  #1  
Old 10-24-19, 09:18 PM
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Capacitor/motor connections

Have a 240VAC household water pump which I wished to change the power cable.
Disconnected the wiring at the pump and forgot to take note of the old wiring connections.

On the pump I have 2 blue wires which dissappear into the pump.
One black wire and a 2 wire capicitor.

Confused on how to connect the capicitor back into the wiring.

I am not sure which of the 3 wires (excluding EARTH) are Active and Neutral.

Would appreciate comments
Thanks

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Old 10-25-19, 12:21 PM
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Welcome to the forums.

We can see that C is a red wire painted blue. That is the start winding.
If you can scrap paint off wires A and B we can tell you how to wire it.
You're looking for white and black.

If you cannot determine colors..... you will need an ohmmeter to measure between
the wires to determine their function.
 

Last edited by PJmax; 10-25-19 at 03:12 PM.
  #3  
Old 10-25-19, 06:00 PM
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Sorry for error

Wire A is BLACK

Wire B is BLUE
 
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Old 10-25-19, 07:47 PM
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Sorry for error

Wire A is BLACK

Wire B is BLUE
 
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Old 10-25-19, 07:50 PM
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Current Australian color code- Single phase
Active – Red/Black
Neutral – Blue
Earth – Green/Yellow

There are so many contradicting sources on the internet.
Being from North America our wiring colors are different from yours.

This is how I would connect it.
Power cord neutral to wire B (blue)
Power cord hot to wire A (black)
Capacitor to wire C (red) and wire A (black)

If the motor doesn't start running immediately..... unplug it and swap the A and C motor wires.
The cap would stay connected as it was.

The only other way to truly know the wiring 100% is to use an ohmmeter to measure the windings.
If you have an ohmmeter or a friend that has one we could explain that process.
 
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Old 10-26-19, 07:25 PM
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Thanks I tried the connections as suggested but get the motor to "hum" but not "run"

Same result no matter which way I connect active and neutral.

I have a Multimeter if you can tell me what to measure.

What little experience I have is mainly in 24VDC.

Thanks I appreciate your trying to help
 
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Old 10-27-19, 12:40 PM
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Using the letters I put on the wiring.... measure from.....

A to B =
B to C =
A to C =
 
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Old 10-27-19, 08:05 PM
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Thanks,


A to B = 23.4

B to C = 5.6

A to C = 18.0
 
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Old 10-30-19, 08:13 PM
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Hello Can Anyone there help me please ????
 
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Old 10-30-19, 10:43 PM
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A to B = 23.4 = start to run
B to C = 5.6 = common to run
A to C = 18.0 = common to start

A = start
B = run
C = common

That means the neutral of power cord goes to wire C.
Hot of the power cord goes to wire B.
The capacitor connects to wires A and B. (no polarity)

 
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Old 10-31-19, 07:23 PM
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Smile

Thank you for your help.

I had assumed that the RED wire from the motor would be connected to the
Active (HOT) wire,

All works well now

Appreciated
 
  #12  
Old 11-01-19, 03:32 PM
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Your colors didn't match what ours are here.
Good job.... especially with the meter readings for me.
 
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