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Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair

ketiz 15612 17
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Is this wiring diagram correct for controlling two independent lights from three locations with Legrand Niloe cross and stair switches, and how should the switches be connected?

The diagram itself is correct; the problem is in the wiring/connection, not in the scheme. You need to trace and mark the conductors properly, especially the two circuits A and B, because the switches were likely mixed up during connection [#16754083] The thread also notes that the drawing is OK, but the installation is incomplete/incorrect if the PE wires are missing [#16753349] One reply states that the standard scheme is “correct” and that the Legrand Niloe switches should be connected according to that diagram, with wire colors possibly differing from the drawing [#16757774] Another comment says the work went wrong in practice, so the next step is to draw the room’s actual wiring layout and match each conductor to the proper switch terminal [#16757863]
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  • #1 16753258
    ketiz
    Level 11  
    Posts: 77
    Rate: 2
    Hello everyone. Today, I spent a few hours connecting the lighting system in the bedroom, which would allow me to control two points of light independently from 3 places. I used 2 cross connectors (at the entrance to the bedroom) and two double stair connectors (on the left and right side of the bed). The fastener brand is Legrand Niloe.

    The scheme to use looks like this:

    Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair

    maybe there is something wrong with this diagram, or I don't read the diagram correctly on the connectors. I am asking you for help in solving this problem.

    Below is a video that presents the effect that I want to achieve.




    best regards
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  • #2 16753292
    retrofood
    VIP Meritorious for electroda.pl  
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    ketiz wrote:
    which would allow me to control two points of light independently from 3 places. I used 2 cross connectors (at the entrance to the bedroom) and two double stair connectors (on the left and right side of the bed). [/ Youtube]
    best regards

    Are you an electrician
  • #3 16753306
    ketiz
    Level 11  
    Posts: 77
    Rate: 2
    retrofood wrote:
    Are you an electrician


    Why do you ask?
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  • #4 16753319
    retrofood
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    ketiz wrote:
    retrofood wrote:
    Are you an electrician


    Why do you ask?

    Because I don't know how to translate the topic. You have almost 10 years of experience in the forum and you do not provide any information about the installation. After all, before installing switches, you need to ensure proper wiring. Is it Is it appropriate? Should we guess?
  • #5 16753349
    mawerix123
    Level 39  
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    ketiz wrote:
    maybe there is something wrong with this diagram


    The diagram is OK except for the lack of PE wires
  • #6 16753375
    ketiz
    Level 11  
    Posts: 77
    Rate: 2
    mawerix123 wrote:
    The diagram is OK except for the lack of PE wires

    let's assume that PE does not exist in this installation.

    in that case the problem lies in connecting to the connectors. Is any of you able to trace this diagram under my connectors?

    Legrand Niloe -

    Double stair: Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair

    Two crosses: Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair

    I lost a few hours and some nerves. I don't know what the problem is anymore, either the dumped eska, or both points glowed at once or none ...

    best regards
  • #7 16753435
    kosmos99
    Level 38  
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    How many stranded wires are between the connectors, where are the wires from the lamps and the power supply coming off?
    Is everything in one can or cans from can to can?
  • #8 16753489
    mawerix123
    Level 39  
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    ketiz wrote:
    let's assume that PE does not exist in this installation.


    This cannot be considered because it is the most important cable.

    ketiz wrote:
    in that case the problem lies in connecting to the connectors


    You combined so :?:

    Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair

    Maybe you actually draw it by hand as you have the wires routed.
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  • #9 16753495
    Akrzy74
    Rest in Peace  
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    ketiz wrote:
    let's assume that PE does not exist in this installation.

    So it must be recognized that installations in this state cannot be used.
  • #10 16753508
    ketiz
    Level 11  
    Posts: 77
    Rate: 2
    The wires are connected as shown in the diagram in the first post.

    8 wires run to the cross connectors at the room door - 4 are routed directly for double stair connectors on each side of the bed.
    In addition to each double stair switch, there is one L conductor from the common room power supply, and the ground conductor, on one side for 1 light source and on the other for the other light source. Cables from the cross to the stairs run directly, L to the stairs run from one cable. N looks like this: N room on both light sources -> to the bulb, from the bulb to the staircase.
  • #11 16753580
    mawerix123
    Level 39  
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    ketiz wrote:
    In addition to each double stair switch, one L cable runs from a common room power supply,


    Power supply is used for one 2x cross and two lamps must be connected to 2x cross. So where are the lamp power cables :?:

    ketiz wrote:
    and along the ground wire,


    Such a cable is not present in the installation.
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  • #12 16753937
    ketiz
    Level 11  
    Posts: 77
    Rate: 2
    mawerix123 wrote:
    Power supply is used for one 2x cross and two lamps must be connected to 2x cross. So where are the lamp power cables


    Only single crosspieces are present in the installation. Installation is dragged according to the scheme in the first post, if it is incorrect, please indicate the correct one.

    mawerix123 wrote:
    Such a cable is not present in the installation.
    . And if you press "zero working" will it change your way of thinking? Because I think you know what I mean
  • #13 16753973
    retrofood
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    ketiz wrote:
    mawerix123 wrote:
    Such a cable is not present in the installation.
    . And if you press "zero working" will it change your way of thinking? Because I think you know what I mean

    Working zero is also absent. And I don't know what you mean, because you haven't answered my question. So, I'm waiting.
  • #14 16754083
    ajibaz
    Level 12  
    Posts: 35
    Rate: 2
    "it either dumped eska, or both points glowed at once or none ..."

    ------ you must have "mixed up" connections. Accurately mark the wires, or at least the "circuits" A and B.

    This description is "illegible":
    "In addition to every ??? double staircase connector, one L conductor runs from the common room power supply, and the ground conductor, on one side for 1 light source and on the other for the other light source. "

    So on the "quickly" drawn diagram of your connectors:
    Attachments:
    • Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair Bez tytułu.png (222.56 KB) You must be logged in to download this attachment.
  • #15 16757009
    ketiz
    Level 11  
    Posts: 77
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    We don't understand each other; / I don't know much about electricity. The question is whether the diagram I presented is correct? If so, could I ask you to replace the connectors in the diagram I presented, substitute my connectors and indicate which cable to connect to which connector?

    Thank you in advance for your help.
  • #16 16757774
    ajibaz
    Level 12  
    Posts: 35
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    The pattern is correct - "book".

    In post # 14 I show how to connect "Your" connectors - also theoretically, I do not know your installation - cable routes, but this does not negate the need for a proper connection as per the diagram with description below. The colors of the veins may be different in your installation, it is important to connect the appropriate "connectors".
    Attachments:
    • Controlling 2 Independent Light Points from 3 Places: Legrand Niloe Connectors, Cross & Stair schem..png (226.21 KB) You must be logged in to download this attachment.
  • #17 16757854
    ketiz
    Level 11  
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    I understand. Today, then, I'll try to create a wiring diagram for the room and throw it here.
  • #18 16757863
    Strumien swiadomosci swia
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    On the diagram you have a well-designed, the work went into the woods.
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Topic summary

✨ The discussion revolves around the installation of a lighting system that allows for independent control of two light points from three locations using Legrand Niloe connectors. The user describes their setup involving two cross connectors at the bedroom entrance and two double stair connectors on either side of the bed. They seek assistance in verifying the correctness of their wiring diagram, as they are experiencing issues with the lights either glowing simultaneously, not at all, or malfunctioning. Forum members provide insights on the importance of proper wiring, the necessity of including PE wires, and the need for clear labeling of connections. The user is encouraged to create a detailed wiring diagram for further assistance.
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FAQ

TL;DR: For two independent lights controlled from three places, the shown scheme works; the only flagged issue was “The diagram is OK except for the lack of PE wires.” Note 1 missing PE conductor. [Elektroda, mawerix123, post #16753349] Why it matters: It helps DIYers fix miswired cross/“stair” circuits and avoid tripping breakers or unsafe, ungrounded installs.

Quick Facts

Is the posted diagram actually correct for controlling two lights from three locations?

Yes. A forum expert confirmed the pattern as a standard, correct “book” layout for two independent circuits controlled from three points. “The pattern is correct – ‘book’.” Label the two circuits (A and B) and keep their travelers isolated. [Elektroda, ajibaz, post #16757774]

Why is the PE (protective earth) conductor mandatory here?

PE provides fault protection. Without PE, exposed metal parts can become live during a fault, creating shock risk. A moderator stated such an installation must not be used when PE is missing. Do not energize until PE is present and verified. [Elektroda, Akrzy74, post #16753495]

How many conductors should I expect at the door cross-switch box?

Expect multiple travelers from both circuits and through-conductors. The OP documented 8 conductors at the door cross-switch location for two independent lighting circuits controlled from three places. Plan box fill and ferrules accordingly. [Elektroda, ketiz, post #16753508]

What symptoms point to miswired travelers or commons?

Common symptoms include both lamps turning on together, neither lamp working, or the breaker tripping on operation. These indicate swapped commons, bridged travelers between circuits, or shorted conductors. Fix by tracing and relabeling A/B circuits. [Elektroda, ketiz, post #16753375]

How should I map and label circuits A and B before wiring?

Mark each cable set and identify the two independent switch loops. Label travelers and commons for circuit A and circuit B end‑to‑end. “Accurately mark the wires, or at least the ‘circuits’ A and B.” This prevents cross-connecting travelers. [Elektroda, ajibaz, post #16754083]

How do I connect Legrand Niloe double stair and cross switches for two independent lights?

Use this 3‑step approach:
  1. Feed L to both double “stair” (two-way) switches; assign left module to Lamp A, right to Lamp B.
  2. Run each module’s two travelers through its own cross switch, keeping A and B separate.
  3. Return from the far “stair” commons to Lamp A and Lamp B respectively. “The pattern is correct – ‘book’.” [Elektroda, ajibaz, post #16757774]

Can I share one phase feed (L) for both circuits at the bed switches?

Yes, you can bring a common phase feed to both double stair switches, but keep the two circuits’ travelers fully isolated. Do not link travelers across circuits; each lamp’s switched live must return only through its own loop to the lamp. [Elektroda, mawerix123, post #16753580]

What does “working zero” mean, and is it acceptable as a substitute for PE?

“Working zero” refers to the neutral (N). Neutral is not a substitute for PE and must not be used as protective grounding. A moderator clarified that a “working zero” is also absent here and does not resolve the missing PE issue. [Elektroda, retrofood, post #16753973]

How should I route neutrals (N) in this setup?

Neutrals typically bypass the switches. Bring N to each lamp, and connect the lamp’s other terminal to the switched live from its loop. The OP described N as common in the room to both light sources, then to lamps, not through the switch. [Elektroda, ketiz, post #16753508]

What if my wire colors don’t match the drawing?

Colors vary by cable and region. Identify functions by testing and labeling, then connect terminals by role: commons to commons, travelers to travelers, per circuit. “The colors of the veins may be different… connect the appropriate ‘connectors.’” [Elektroda, ajibaz, post #16757774]

Are Legrand Niloe modules suitable for cross and stair switching here?

Yes. The build uses Legrand Niloe double stair and cross modules for two independent lighting points. They are appropriate for standard two‑way and crossover arrangements when wired per the verified scheme. [Elektroda, ketiz, post #16753258]

Why did both lamps switch together after wiring?

That indicates crossed travelers or a bridged common between circuits A and B. Separate the two loops, label them, and verify each pair of travelers routes only through its own cross switch. This exact failure pattern was reported by the OP. [Elektroda, ketiz, post #16753375]

The diagram shows no PE—can I just proceed without it?

No. An expert noted the diagram lacked PE and another moderator stated the installation cannot be used in that state. Add a compliant PE conductor to all relevant boxes and fixtures before energizing. [Elektroda, Akrzy74, post #16753495]

What’s the fastest way to debug a tripping breaker on switch toggling?

Open all switches, isolate circuits A and B, and continuity‑test travelers per loop. Restore the correct common on each stair switch. This resolves shorts caused by crossed travelers that trip the breaker when toggled. [Elektroda, ketiz, post #16753375]

Does the community agree the wiring went wrong, not the concept?

Yes. A contributor summarized, “On the diagram you have a well-designed, the work went into the woods.” The concept is sound; the issue is execution and identification. [Elektroda, Strumien swiadomosci swia, post #16757863]
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