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How do you connect a single phase motor to a three phase power supply in UK?

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for countries in Europe and other world areas running a 50 Hz supply service. UK household AC power mains voltage is now 230V (previously it was 240V) 50 Hz. From a 415 volt 3-phase incoming supply you will get this voltage between any ONE line and the Neutral.

Between any two lines you will get 415V. DO NOT WIRE IT LIKE THIS!

So, if you wire the motor to any ONE line (and ONLY ONE) and Neutral you'll get the correct voltage.


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.

My advice would be to buy a proper transformer which can be connected to a 415V 3ph input and give 230V 1ph output at a current rating suitable for the motor and its purpose. I assume the questioner's installation is in a commercial premises because domestic supplies in the UK are 230V 1ph only - running a 3ph motor off that requires a suitable inverter.
Thanks for the feedback!

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A 3-phase system can generally supply more power than single phase.  Most ordinary houses have a single-phase supply while larger  buildings like factories have 3 phase. 

Can you connect a single phase motor to a 3 phase supply?

Yes. Simply connect the motor across any two of the lines. Make sure, however that the line-to-line voltage is the same as the rated voltage of the motor. The reverse does not

Can you get a 3 phase supply from single phase and how?

No, you cannot get a three phase supply directly from a single phase supply. Nowadays electronic inverter units can be bought that will do the job. For very low power loads

What Difference between a single-phase power supply and a 3-phase power supply?

  A single phase power supply has two "hot" legs or conductors which have a sine wave that are 180 degrees apart.   A three phase power supply has three "hot" conductor

How is a three phase motor different from a single phase motor?

The sine waves of a 3 phase power supply are 120 degrees apart, in a single phase supply they are 180 degrees apart. Three phase motors also consume almost half the amperage o

How do you wire a three phase motor to a three phase power supply?

  Answer     Connect the 3 conductors of the power source to the 3 conductors of the motor turn the motor on for a brief moment to note the direction that it turn

How do you connect 3 phase inverter to single phase supply?

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What will happen if two phase supply given to the three phase motor?

There actually is no such thing as 2 phase. You either have single phase (As most/all residential services), or three phase (primarily in commercial/industrial).   When a n

How do you run a 3 phase motor on a single phase supply?

You cannot run a three-phase motor on a single-phase supply. You can if you have 1phase to 3 phase inverter The physical internal windings between single phase and three ph

You have 230v 3 phase power can you plug a 230v single phase motor into it?

Any two legs of a three phase system are classed as single phase. So yes a single phase motor will operate when connected. Be sure to use the proper motor protection devices t

What are the advantages of using three phase to single phase motors?

Using three-phase or singe-phase motors depends mainly on what type  of electric power supply is available.    Most small properties have a single-phase supply of up t