# Do transformers have a positive and negative?

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## Does it matter which way you wire a transformer?

Unless one of the wires has continuity to the transformer core, the polarity doesn’t matter. A relatively safe way to test transformers is to hook up a small AC voltage (1-5VAC) and measure the voltages across the other windings.

## Which side of a plug is positive?

Which side of a 2-prong plug is positive? Because we use A/C current, prongs don’t have have a positive and negative. Instead, the two prongs have a ‘hot’ and ‘neutral’ side. The wider prong connects to the neutral wire and the smaller prong smaller prong is the hot side of the circuit.

## How do you identify a transformer?

The ratio between the number of actual turns of wire in each coil is the key in determining the type of transformer and what the output voltage will be. The ratio between output voltage and input voltage is the same as the ratio of the number of turns between the two windings.

## Does polarity matter on AC transformer?

An AC current polarity is changing time to time, with periodical time. That’s why you know there is 60Hz system, mean that the polarity change 60 times per second. Or 50Hz in IEC. So the polarity it is no matter again.

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