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Connecting 400V Wheel Balancer: Color-Coded 4-Wire Cable, P1 P2 P3 & Pe Phases, Safe Setup

pebe1234 10134 18
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How should I connect a 400V wheel balancer when the 4-core cable has a blue conductor that the electrician used as one of the phases?

Yes — if the machine is marked for 400 V and the manual shows only P1, P2, P3 and PE, it is a three-phase supply without neutral, so the blue core can be used as a phase in this kind of cable [#16469165][#16471931] Do not rely on wire colors alone, because some foreign or special-purpose machines use blue as a phase conductor rather than N [#16469138][#16469189] Open the electrical box and verify the terminals are L1/L2/L3 and PE, or measure the conductors to confirm the wiring before powering it up [#16469165][#16469023]
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  • #1 16468954
    pebe1234
    Level 2  
    Posts: 2
    Board Language: polish
    Hello
    I have a problem, I need to safely connect the device - wheel balancer. There is a clear inscription 400v on the casing and a 4-core connecting cable yellow-green with a transition to the housing brown pink and blue. In the manual there is only information about the three phases P1 P2 P3 and Pe without colors And here I have a problem because the electrician connected blue as one of the phases and now I am afraid to turn on the engine. Is this the correct connection? Regards, Przemek
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  • #2 16468968
    polaklbn
    Level 24  
    Posts: 594
    Help: 55
    Rate: 161
    Board Language: polish
    If the electrician connected so, let him start the device.
    And if the mechanic folds the timing, he gives the car to the customer without checking and in the event of the belt breaking when the engine is started, does he complain to the customer or repair what he screwed up?
    I don't know what device you have, but in Poland the blue color means N, i.e. the wire from the transformer's neutral point. It can be used in a 3-phase unbalanced installation.
    It is to be connected as written in the DTR.
  • #3 16469014
    pebe1234
    Level 2  
    Posts: 2
    Board Language: polish
    I know that blue is N and that's why it does not suit me, but I also doubt that it would be two-phase. The wheel balancer has been in stock for several years and no one remembers it working at least once. It is Dutch production and there is a diagram without color marking P1 P2 P3 and Pe no N marking, original cable but Polish plug.
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  • #4 16469023
    elpapiotr
    Electrician specialist  
    Posts: 12193
    Help: 1013
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    Board Language: polish
    Just an electrician used a 4-wire cable with the colors blue, z-ż, brown and black to power the machine,
    Unfortunately, in this case the blue-colored conductor "does" to phase.
    And it is enough to measure the tensions between all the veins and you know everything.
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  • #5 16469121
    polaklbn
    Level 24  
    Posts: 594
    Help: 55
    Rate: 161
    Board Language: polish
    elpapiotr wrote:
    it is enough to measure the tensions between all the veins and you know everything.

    I would say resistances because if I understood correctly it is a device cable.
  • #6 16469138
    michal54_87
    Level 17  
    Posts: 240
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    Board Language: polish
    Hello, this is the original cable I have met more than once that the blue cable is a phase, there are machines from other countries.
  • #7 16469165
    Krzysztof Kamienski
    Level 43  
    Posts: 21873
    Help: 2029
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    Board Language: polish
    It is correct, because the supply voltage itself indicates three-phase. Colleague @ michal54_87 he saw it rightly. Just unscrew the cover of the electrical box in the machine and make sure. L1, L2, L3 and PE (sometimes UVW, sometimes RST, but always three) + PE, i.e. protective conductor.
  • #8 16469175
    karolark
    Level 42  
    Posts: 14248
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    Board Language: polish
    michal54_87 wrote:
    Hello, this is the original cable I have met more than once that the blue cable is a phase, there are machines from other countries.


    In other countries it may be so, but with us it would be worth sticking to the fact that N is blue
  • #9 16469189
    kkas12
    Level 43  
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    pebe1234 wrote:
    The housing has a clear inscription 400v and a 4-core yellow-green connecting cable with a transition to the brown, pink and blue housing.
    It is a cable for special applications, also produced in Poland. Ask the manufacturer why it was used in this case.
    In Poland, he can also be found where he should not be.
  • #10 16469196
    elpapiotr
    Electrician specialist  
    Posts: 12193
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    Board Language: polish
    kkas12 wrote:
    pebe1234 wrote:
    The housing has a clear inscription 400v and a 4-core yellow-green connecting cable with a transition to the brown, pink and blue housing.
    It is a cable for special applications, also produced in Poland. Ask the manufacturer why it was used in this case.
    In Poland, he can also be found where he should not be.

    Of course - I have met too.
    Power supply for a 3-phase Gudepol compressor:

    Connecting 400V Wheel Balancer: Color-Coded 4-Wire Cable, P1 P2 P3 & Pe Phases, Safe Setup
  • #11 16469667
    maziar1000
    Level 15  
    Posts: 280
    Help: 4
    Rate: 45
    Board Language: polish
    Well, when we have such a conductor / cable, we put neutral in blue and the phase in yellow-green or neutral in yellow-green in the phase blue? The standards do not say anything about it, and how does it look in practice? How we are supposed to have only a protective one, it is known.
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  • #12 16469692
    karolark
    Level 42  
    Posts: 14248
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    maziar1000 wrote:
    Well, when we have such a conductor / cable, we put neutral in blue and the phase in yellow-green or neutral in yellow-green in the phase blue? The standards do not say anything about it, and how does it look in practice? How we are supposed to have only a protective one, it is known.


    Oh they say buddy they say :cry:
  • #13 16469744
    maziar1000
    Level 15  
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    karolark wrote:
    maziar1000 wrote:
    Well, when we have such a conductor / cable, we put neutral in blue and the phase in yellow-green or neutral in yellow-green in the phase blue? The standards do not say anything about it, and how does it look in practice? How we are supposed to have only a protective one, it is known.


    Oh they say buddy they say :cry:

    Yes? It's cool, can you pass it?
  • #15 16471404
    Szyszkownik Kilkujadek
    Level 37  
    Posts: 5010
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    Board Language: polish
    elpapiotr wrote:
    kkas12 wrote:
    pebe1234 wrote:
    The housing has a clear inscription 400v and a 4-core yellow-green connecting cable with a transition to the brown, pink and blue housing.
    It is a cable for special applications, also produced in Poland. Ask the manufacturer why it was used in this case.
    In Poland, he can also be found where he should not be.

    Of course - I have met too.
    Power supply for a 3-phase Gudepol compressor:

    Connecting 400V Wheel Balancer: Color-Coded 4-Wire Cable, P1 P2 P3 & Pe Phases, Safe Setup

    I associate such a cable with induction kitchen hobs. L1, L2, N, PE for the heating plate, and L3, N, PE for the oven.
  • #16 16471676
    KamiJas
    Level 14  
    Posts: 200
    Help: 4
    Rate: 20
    Board Language: polish
    The manufacturer gave such a cable for the compressor due to economy, unfortunately he does not have standards somewhere, and probably it was made in China
  • #17 16471865
    Brivido
    Level 34  
    Posts: 2845
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    Board Language: polish
    You see, 4x cables with gray conductor are not available for motors, and for lamps with blue conductor :D
  • #18 16471931
    mawerix123
    Level 39  
    Posts: 4143
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    Board Language: polish
    pebe1234 wrote:
    but the Polish plug


    Since the cable is terminated with a plug, why do you go through this machine :?:
    if the markings you gave are correct, the machine is definitely 3-phase, do not be influenced by the colors of the wires
  • #19 20660369
    winiar7
    Level 7  
    Posts: 65
    Rate: 8
    Board Language: polish
    and such connections, without N
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    • Connecting 400V Wheel Balancer: Color-Coded 4-Wire Cable, P1 P2 P3 & Pe Phases, Safe Setup 1689789541656.jpg (1.19 MB) You must be logged in to download this attachment.
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Topic summary

✨ The discussion revolves around the safe connection of a 400V wheel balancer using a color-coded 4-wire cable. The user expresses concern over the connection made by an electrician, specifically regarding the use of a blue wire as a phase instead of neutral, which is standard in Poland. Various responses highlight that the blue wire can indeed be used as a phase in certain applications, particularly for machines from other countries. Participants suggest verifying the connections by checking the electrical box for proper phase identification (L1, L2, L3, and PE). The conversation emphasizes the importance of adhering to local wiring standards and the need for caution when dealing with electrical setups.
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