What is phase neutral reversal?

Answer 1

Most mixers have a so called "phase reverse button" but it's not a "phase" button, it's the "polarity reverse" button in each channel. It's real simple, to reverse the polarity on a mic, you simply reverse the pin wires 2 an 3.

Phase means time shifting. Polarity reversion means changing cable a and b.

That are really different things.

Scroll down to related links and look at "Polarity reversal is not phase shifting".

This answer has nothing to do with phase: To reverse the rotation on a three phase motor you simply swap any two of the three motor leads

Answer 2

Also called reverse polarity. === === Commonly noticed during a home inspection prior to purchase or sale. This means when you test a receptacle, the hot slot is connected to neutral and the neutral slot is connected to hot. You need to make sure that your hot wires and neutral wires are connected to the proper terminals (hot to brass, neutral to silver). If this applies to many receptacles in an area, it's usually a matter of finding and fixing the first one. If this applies to one or two receptacles, it's easy to fix them. To correct this, shut off the breaker for the circuit in question and test it to verify it is off. Remove the receptacle and verify the white wires are on the silver screws and the black, red, or blue colors are on the brass screws. If this is done your polarity will be correct.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.