Where can I find the wiring diagrams to wire single phase to a 3 phase 4 wire supply?

Answer 1

It doesn't work that way. Phase angle relationship will affect the motor and grounding will be a problem.

Another opinion

This question is not at all crystal clear to understand and what you can do will depend on where you live and what incoming electric power services you already have.

If you're asking this question to find out how to produce a new 3 phase 4 wire supply from a single phase incoming service line - because, say, you don't already have a 3-phase service coming into your home or workshop and you wish to use a piece of machinery you have just bought that has a 3 phase motor in it - it can be done using an electronic phase inverter.

The prices of such phase inverters go up steeply according to how much 3 phase power they have to deliver so, if, say, you have bought some equipment that has a very large 3 phase motor, it may be worth asking your electricity service utility company how much it would cost to install a new 3 phase service at your home or workshop?

But, as already stated, this question is hard to understand as written, so if you are asking it because you already have an incoming 3 phase service at your main breaker panel - i.e. there are already 3 incoming service lines plus a ground wire - then in most cases you will already have available to you at least one single phase service and will have standard single phase outlets ready to use!

Always, of course, depending on exactly where you live in the world, most electricity utility companies nowadays generate and distribute their power as 3 phase and then use small 3 phase delta-to-star Transformers (also known as delta-to-wye transformers) in sub-stations on the ground - or mounted up high on service poles above the ground - to deliver local single phase services with a neutral to homes, offices, etc. which don't need a 3 phase service.

Yet Another Opinion

To obtain a single-phase supply from a three-phase, four-wire, system, you simply connect the load either (a) between any two line conductors, or (b) between any line conductor and the neutral conductor -depending on the level of voltage required. In the UK, for example: the nominal line-to-line (line voltage) is 400 V, while the line-to-neutral (phase voltage) is 230 V.

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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.