Is it possible to convert 220 v wiring to two 110 v wiring?

Answer 1

You will need a 220 volt primary isolation transformer with a split, center taped, secondary 220 volt winding.

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Answer for USA

If you live in the United States and your 220v circuit is a 2-pole circuit, you replace the 2-pole breaker with 2 individual 110v breakers and **PRESTO** you are now ready to run 2 individual 110v circuits.

If you wish to use existing wiring, and you have 3 wires plus ground, you have all you need. These 2 circuits can share the same neutral without any electrical danger.

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Before you do any work yourself

on circuits, equipment or appliances,

ensure the circuit is, in fact, OFF.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

Answer 2

This is possible only if there are separate ground and neutral conductors with the "hot" conductors. This is easy to tell because you will have 4 conductors. If you have 3 conductors it cannot be done without rewiring the circuit.

To do this each hot conductor becomes a separate circuit and they share the ground and neutral conductors. You may wish to replace your 2-pole breaker with individual breakers but this is not absolutely necessary.

It is very important that you do not move your breakers around. Sharing the neutral is contingent on having each hot conductor fed from separate legs of your single phase service. If you breakers are right next to each other, whether vertically or horizontally, this is true. I recommend you do not move the breaker locations around. Leave them where they are even if you replace the breakers and you don't have a problem.