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Aluminum Installation: Motion Sensor Lamp Not Working, Possible Cable Damage & Troubleshooting

houser1 5859 16
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Why would an outdoor motion-sensor lamp stop working after house insulation, with voltage appearing on the neutral and protective wires as well?

The most likely cause is a damaged conductor in the wall/under the new insulation, especially a broken or pierced neutral/PEN wire. The replies note that if one vein is not continuous, the lamp will stop working, and if the protection did not trip, there was probably no short circuit [#16474050][#16474343] Another answer specifically points to a drilled or broken aluminum wire under the polystyrene from the insulation work [#16474304] The voltage showing up on the neutral/protective wires can happen with an open conductor or through the lamp’s filters, so the fault should be traced under the insulation rather than assumed to be the lamp itself [#16474337][#16474108] The original poster later confirmed that there was a pierced wire [#16498026]
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  • #1 16474040
    houser1
    Level 11  
    Posts: 13
    Rate: 2
    Hi.

    I have an aluminum installation at home. I use a lamp with a motion sensor outside and it has worked flawlessly so far. After insulating the house and putting it back on, it doesn't work. Before its assembly, only the phase cable runs current (it does not flow in other wires), while after connecting the lamp, the current also runs in the neutral and protective cable, and the lamp still does not work.

    Do you think any of the cables has been damaged?
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  • #2 16474050
    kkas12
    Level 43  
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    It operated as all veins were continuous. Today it does not work because the null vein has been broken.
  • #3 16474066
    houser1
    Level 11  
    Posts: 13
    Rate: 2
    Thanks for the answer. Do you think that the cable is punctured if the current flows only in phase before connecting the lamp?
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    #4 16474079
    kkas12
    Level 43  
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    How should I know?
    All I know is that one vein is not continuous.
    And there are many reasons for this state.
  • #5 16474108
    brofran
    Level 41  
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    houser1 wrote:
    the current also runs in the neutral and protective cable

    There should be no current in the protective conductor. Look for the cause here!
  • #6 16474137
    karolark
    Level 42  
    Posts: 14325
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    houser1 wrote:
    however, after connecting the lamp, the current also runs in the neutral and protective cable


    The current is running or there is voltage on it :-)
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  • #7 16474203
    houser1
    Level 11  
    Posts: 13
    Rate: 2
    The Amothian test tube lights up when I check. I don't know electricity.
  • #8 16474230
    sosarek

    Level 43  
    Posts: 83875
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    houser1 wrote:
    I don't know electricity.

    So invite someone who knows about her before you do more harm than good, not to mention your health and that of others.
    Company Account:
    Z
    Pka, Poznań, 60-850
    Helpful post? Buy me a coffee.
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    #9 16474304
    mawerix123
    Level 39  
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    houser1 wrote:
    I have an aluminum installation at home.

    houser1 wrote:
    After insulating the house and putting it back on, it doesn't work


    Now break this new polystyrene and look for the cause of the fault under it, maybe it's a drilled wire or broken (aluminum) during the installation of insulation.
  • #10 16474312
    karolark
    Level 42  
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    mawerix123 wrote:
    houser1 wrote:
    I have an aluminum installation at home.

    houser1 wrote:
    After insulating the house and putting it back on, it doesn't work


    Now break this new polystyrene and look for the cause of the fault under it, maybe it's a drilled wire or broken (aluminum) during the installation of insulation.


    As above, money for everything is in addition to replacing the installation and now the problem :cry:
  • #11 16474319
    houser1
    Level 11  
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    I'll look under the polystyrene. It probably is actually drilled.
  • #12 16474328
    sosarek

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    houser1 wrote:
    It probably is actually drilled.

    And in addition, it is compact, since there is a phase on all of them - I wonder why no protection worked? Call the ELECTRICIAN if you are not going to blow everything up.
    Company Account:
    Z
    Pka, Poznań, 60-850
    Helpful post? Buy me a coffee.
  • #13 16474337
    karolark
    Level 42  
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    sosarek wrote:
    houser1 wrote:
    It probably is actually drilled.

    And in addition, it is compact, since there is a phase on all of them - I wonder why no protection worked? Call the ELECTRICIAN if you are not going to blow everything up.


    Rather, only a break in the PEN voltage appears after connecting the lamp - it probably closes through the filters.
  • #14 16474343
    kkas12
    Level 43  
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    The phase is precisely because the zero vein has been broken. And since the protection did not work, there is no short circuit.
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  • #15 16474344
    mawerix123
    Level 39  
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    sosarek wrote:
    And in addition, it is compact since there is a phase on all of them


    A rather broken neutral wire and the phase wire may not have been broken.

    EDIT: colleagues were faster ;)
  • #16 16474359
    houser1
    Level 11  
    Posts: 13
    Rate: 2
    Approx. I will look for the pierced vein and write what was. Thanks for the answers.
  • #17 16498026
    houser1
    Level 11  
    Posts: 13
    Rate: 2
    There was a pierced vein. Thank you for your help.
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Topic summary

✨ The discussion revolves around troubleshooting a motion sensor lamp connected to an aluminum installation that has stopped functioning after insulation work. The user notes that only the phase cable carries current before connecting the lamp, while the neutral and protective cables also show current after connection, indicating potential cable damage. Responses suggest that the neutral wire may be broken, possibly due to drilling during insulation installation. Several participants emphasize the importance of consulting a qualified electrician to avoid further issues and ensure safety. The user confirms later that a pierced wire was indeed the problem.
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