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How to determine Neutral/Live from transformer output

abuhafss

Aug 3, 2010
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Aug 3, 2010
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348
Hi

Recently I received 110VAC pneumatic Solenoid Valves from AliExpress, though I had ordered for 12VDC. To save time I decided to use them but here we have 220V 50Hz.

Since the solenoids are very small, I planned to wind a small step down transformer. The question is how do I identify the neutral and live wires from the 110VAC output of the transformer? Or I just connect any one wire directly to the solenoids and the other wire thru relays?
 

Bluejets

Oct 5, 2014
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Oct 5, 2014
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There is no neutral or active until the output is referenced to ground.
Your final guess is correct.
 

duke37

Jan 9, 2011
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Jan 9, 2011
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If you wind an auto transformer then neutral in = neutral out.
 
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