Detecting which phase a circuit is on.

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Is there anyway of detecting the phase of a circuit from a 3phase board at a socket or switch???
 
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you can't do it from the socket alone you will need some reference feeds from the board.

if you have a reference feed from all the phases then you can just measure voltage between the unknown phase conductor and the three phases.
 
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Can you identify which fuse / MCB supplies the circuit ? ( by turning tem off one at a time ) If so maybe then you can trace the tail back to the meter.
 
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