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Power cable for motors

Derek Eccles

I understand pump motors tend to be wired in delta fashion, not needing a neutral connection. I have seen cases where a 4 core SWA cable has been used to power the motor, the fourth core being used as the earth connection. Is it possible to get 4 core SWA cable with brown, black and grey colours for the phases and green/yellow for the earth or is it common practise to use the blue core as the earth ?

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    Derek Eccles: 
     

    I understand pump motors tend to be wired in delta fashion, not needing a neutral connection. 

     

    This is also true if the motor is wired in STAR (WYE) fashion. In fact many manufactures explicitly state that the star point MUST NOT be connected to the neutral.

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    Derek Eccles: 
     

    I understand pump motors tend to be wired in delta fashion, not needing a neutral connection. 

     

    This is also true if the motor is wired in STAR (WYE) fashion. In fact many manufactures explicitly state that the star point MUST NOT be connected to the neutral.

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