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 [WTA] Need help on wiring

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TSturion64
post Oct 6 2023, 03:19 AM, updated 3y ago

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Hello, I've got a coffee machine with the cables color coded as in the picture. There are 3 Live, 1 Neutral and 1 Ground wire. My home power supply is a Single phase 220-240v with 1 Live, 1 Neutral and 1 Ground wires. Also in the picture is the coffee machine wiring diagram (circled in green) coincide with my home power supply type.

Question : how do I connect my coffee machine with 3 live wire to my home power supply which only have 1 live wire? Thank you!

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TSturion64
post Oct 6 2023, 12:56 PM

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QUOTE(thinkgoodpositive @ Oct 6 2023, 08:16 AM)
From the coffee machine live wire code, i.e. Brown, black, grey. It looks like is a 3 phase machine which is contradicted with your circled wiring diagram of single phase.
Maybe can you snapshot the machine rating plate see its voltage and phases before conclude?
The power supply is single phase , separate switch/breaker? Got external photo?
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I think the wiring diagram shows 3 wiring option depending on your power supply.

Here are the photos of the machine rating plate and power supply is a 20amp isolator direct from DB.

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This post has been edited by turion64: Oct 6 2023, 12:59 PM
TSturion64
post Oct 6 2023, 04:37 PM

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QUOTE(jetblast @ Oct 6 2023, 05:05 AM)
Why don't you open the. Plug side of the coffee machine wire and check?
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care to elaborate more?

QUOTE(bumfart @ Oct 6 2023, 08:33 AM)
according to the wiring diagram, you can connect all 3 live wires (M) together
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that is my initial thought as well. but just wanted to double check here



TSturion64
post Oct 6 2023, 04:40 PM

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QUOTE(Zot @ Oct 6 2023, 08:29 AM)
Some appliances can be configured to run from 1-Phase or 3-Phase supply. Looks like the motor inside the unit is 3 phase motor obviously but can be configured to run on single phase. Just follow the wiring diagram.

I'm just curious why the 3 phase wire colors are not standard  hmm.gif

My bad. It is the color used in UK and EU. I thought it is white but more like gray.  smile.gif
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yes according to diagram the machine can be configured for either single or 3 phase. i am not really clear on how to read the wiring diagram supplied. should i connect only a single live wire (if yes, which color) or combine all 3 live wire?
TSturion64
post Oct 6 2023, 05:21 PM

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QUOTE(Zot @ Oct 6 2023, 05:02 PM)
Yes. Combine all Live wire together in this case according to diagram.

It is quite common for coffee maker. I read that one user did it that way. Two L wire will negate their phase and one of the wire will spin motor.

Look like the heater is 4.3kW. Just make sure you connect directly to 20A MCB, not the 13A socket there. I see you have your double pole switch already.  thumbsup.gif
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Thank you for your detailed response. I see on the wiring diagram it only stated the M (Brown color) to be connected to the Live power supply. There are 2 other wires beside it with no description but with a remark below stating jumpers are supplied. Just wanted to be absolutely sure before I attempt the connection - would combining 3 Live wires or even a single live wire causes any issue?

 

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