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[Solved] Safety Concerns: Mounting Foam on Electrical Switchboard Cables

panjann 14202 44
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #31 18136733
    clubber84
    Level 37  
    popiol667 wrote:
    2. I am asking without malice - if it was made incorrectly, why do these types of flowers pass through during designs and acceptance?

    There is a topic about SEP somewhere on the website - and it explains the difference between authorizations and professional qualifications.
    It is likely that "developers" employ the "cheaper" ones.
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  • #32 18137051
    panjann
    Level 2  
    Thank you all for your replies so far.

    I think I`ve already given a sufficient answer to my question about the safety of using foam - with such an amount and assuming that the foam itself does not insulate the joints, it does not pose a danger.

    Additionally, the topic of the switches used was discussed. 3-phase residual current devices for single-phase circuits.
    As far as I know, there are two circuits in the apartment: 3-phase (kitchen) and 1-phase - I am attaching photos of the switchgear with the housing and description.
    Is this connection correct? If not, what is correct?

    Safety Concerns: Mounting Foam on Electrical Switchboard Cables
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  • #33 18137083
    ArturAVS
    Moderator  
    Using an RCD for lighting is a misunderstanding, and the entire lighting "hangs" on one circuit. The socket circuits in the bathroom should be protected with it.
  • #34 18137088
    popiol667
    Level 18  
    You have in your apartment:

    1. 1 3-phase circuit
    2. 6 single-phase circuits

    These 7 circuits have a common RCD 3f

    3. 1 circuit protected by RCD 1f with an overcurrent element (lighting). It`s strange that the lighting was implemented separately, and not the bathroom...

    My friend Artur replied while I was writing...
  • #35 18137090
    Łukasz-O
    Admin of electroenergetics  
    ArturAVS wrote:
    Using an RCD for lighting is a misunderstanding, and the entire lighting "hangs" on one circuit. The socket circuits in the bathroom should be protected with it.

    Lighting in the bathroom must also be protected by an RCD.
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  • #36 18137091
    popiol667
    Level 18  
    Yes, but you could socket and bathroom lighting on a separate RCD.
  • Helpful post
    #37 18137104
    ArturAVS
    Moderator  
    Łukasz-O wrote:
    Lighting in the bathroom must also be protected by an RCD.

    Of course, but better:
    popiol667 wrote:
    socket and bathroom lighting on a separate RCD

    And basically it is, because it is protected by RCD 3f.
  • #38 18137255
    andrzej lukaszewicz
    Level 41  
    popiol667 wrote:
    If it were otherwise, the TEST button would be a form of Russian roulette for, for example, two-phase induction hobs.

    The induction hob does not need to be connected via an RCD. This device is hard-wired and basic protection is sufficient.
  • #39 18140913
    popiol667
    Level 18  
    andrzej lukaszewicz -->

    1. What if the network layout is TT?
    2. What if, in addition to induction, we also have a power socket on this circuit to connect a portable device?
    3. Just because it is not required does not mean it is prohibited and should not pose a risk of damage to the three-phase device
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  • #40 18140938
    elpapiotr
    Electrician specialist  
    By the way, if it weren`t for the stupid actions of the installer of this switchgear, there would be no issue.
    But there is always someone out there who knows better that it is possible and that there are no contraindications to mounting the backboard on foam.
    We can see the effects in the photo.
  • #41 18140943
    popiol667
    Level 18  
    elpapiotr -> But there is educational value! I learned that not all circuits need to be RCD protected :)

    Regards!
  • Helpful post
    #42 18144165
    andrzej lukaszewicz
    Level 41  
    panjann wrote:
    Please help,

    The cables in the electrical switchboard of the apartment that I received from the developer are dirty with mounting foam - I attach photos.
    Can such contamination of cables cause problems (load, voltage) and can it be dangerous?

    I learned about the condition of the interior of this switchboard only after a problem with the installation occurred - I heard sparking, there was a problem with the voltage - as a result, one fuse was melted - it needed to be replaced.


    Safety Concerns: Mounting Foam on Electrical Switchboard Cables
    Safety Concerns: Mounting Foam on Electrical Switchboard Cables

    Out of curiosity: do you have any measurement report of your electrical installation?
  • Helpful post
    #43 18148664
    popiol667
    Level 18  
    andrzej lukaszewicz -->

    Quoting Dr. Edward Musiał:
    All the measures discussed will be of no use if the TT system leaves the possibility of short-circuiting L-PE in any circuit not protected by a residual current device (Fig. 8). Such a short-circuit will not be disabled by short-circuit protection because the current is too low and a touch voltage close to the phase voltage occurs for a long time, also in circuits with the most sensitive switches.

    So:
    "The induction hob does not need to be connected via an RCD. This device is permanently connected and basic protection is sufficient."

    Is it too much of a simplification and is harmful advice if we don`t know what the network layout is? Because a layman will type induction + rcd into Google and a post will pop up stating that there is no need to install a residual current device.....

    I need. In the TT system.
  • #44 18157972
    panjann
    Level 2  
    Thank you for all your answers.
    I`m closing the topic.

    Regards!
  • #45 18157976
    panjann
    Level 2  
    Thank you for all your answers.
    I`m closing the topic.

    Regards!

    Added after 2 [minutes]:

    I think I`ve already given a sufficient answer to my question about the safety of using foam - with such an amount and assuming that the foam itself does not insulate the joints, it does not pose a danger.
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Topic summary

The discussion centers on safety concerns regarding the presence of mounting foam on electrical switchboard cables in an apartment. Users express that while the foam itself is an insulator and does not directly pose a danger, excessive amounts could lead to overheating, insulation melting, and potential fire hazards. Concerns are raised about the foam interfering with connections, particularly on neutral (N) and protective earth (PE) strips, which could result in insufficient contact. The conversation also highlights issues with the installation of residual current devices (RCDs), particularly the use of 3-phase RCDs for single-phase circuits, which can create risks if not properly managed. The importance of correct installation practices and the potential dangers of loose connections are emphasized, alongside the need for proper circuit protection, especially in bathrooms. The topic concludes with the author feeling reassured about the safety of the foam in its current state but acknowledges the need for proper electrical installation standards.
Summary generated by the language model.
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