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What cross-section of the cable to the lamp, the bulb max 100W.

MaleLampy 33582 14
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 12775388
    MaleLampy
    Level 9  
    Good morning,
    I recently bought a very old table lamp. The power supply cable needs to be replaced. On Allegro, I found braided cables with different cross-sections (in the Allegro search engine, enter 3509920148, which is the auction number - sorry, I can not put external links on the forum) that visually match such an old object. I will screw a 100W light bulb into the lamp. If it is important, the length of the cable from the lamp to the socket is 2m, a switch (switch) of a very old type on the cable, the lamp is made of copper and other non-ferrous metals.
    It will also be necessary to choose a plug for the socket, because it has unfortunately crumbled. Should I also pay attention to something while making this choice?

    I have the same question regarding the cable cross-section for a pendant lamp in which 5 light sources of 75W are connected to it. (All metal lamp)

    I would be grateful for your response.
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  • #2 12775696
    speedy9
    Helpful for users
    2x0.75mm? cable for the lamp. Any plug. For pendant lamp 3x1.5mm?
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  • #3 12775813
    TWK
    Electrician specialist
    speedy9 wrote:
    2x0.75mm?
    Are you sure 2? Does this lamp meet the requirements for a receiver in II insulation class?
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  • #4 12775834
    MaleLampy
    Level 9  
    Under the given auction number on the Allegro, such markings are used in the description of the cables and these cables are also shown. The lamp, on the other hand, is about 120 years old and I think it is difficult to talk about classes and standards in this case. It is just about 15 kg in size made of copper.
    The pendant is younger and is about 100 years old, but I suspect that the case is similar. It's also just a piece of solid cast metal.
  • #5 12776069
    serwisor
    Level 29  
    Hi.
    You can be tempted to connect a protective conductor, I would even recommend it, the more so that the house is probably a new installation, only stylized as the old one, through sockets etc.

    And the lamp, as a cast, can be even more dangerous if one of the wires is punctured, because it will be the entire working circuit itself.

    Ground? Maybe, just like the TV used to be, put a flowerpot and a wire in the ground ...
  • #6 12776118
    TWK
    Electrician specialist
    serwisor wrote:
    And the lamp, as a cast, can be even more dangerous if one of the wires is punctured, because it will be the entire working circuit itself.
    It is also not known if what the lamp holder is - they were different in the old lamps. Often better than those produced today, but there were also those in which it was easy to transfer the voltage to the lamp housing when changing the bulb (without the inserts protecting against contact with the socket to the metal housing of the lamp holder).

    If all elements do not have double or reinforced insulation, then in my opinion the conductive parts of the available lamps (the entire cast) should be connected to the protective conductor. Especially that the cable from the auction in post # 1 does not look double-insulated.
  • #7 12776249
    Łukasz-O
    Admin of electroenergetics
    TWK wrote:
    Especially that the cable from the auction in post # 1 does not look double-insulated.

    If not like that, third and fourth from the top ;)
    There is also a description:
    Quote:
    AVAILABLE SECTIONS:
    - 2x0.5
    -2x0.75
    - 3x0.75
    -3x1.5
    -2x1.5 (only available in gold, gray, brown)
    - 3x2.5 (only available in ivory)
  • #8 12777047
    MaleLampy
    Level 9  
    You mentioned the frame, I took pictures, they are attached. Maybe it will allow a better assessment.
    What cross-section of the cable to the lamp, the bulb max 100W. What cross-section of the cable to the lamp, the bulb max 100W. What cross-section of the cable to the lamp, the bulb max 100W. What cross-section of the cable to the lamp, the bulb max 100W.
  • #9 12777211
    elpapiotr
    Electrician specialist
    Historical beauties.
    Can not be ripped off !
    But it will not put a protective conductor into the holder anyway, because there is nothing to connect to.
    Additional sleeves are required for the stranded wires of the 3-wire cable, if applicable.
  • #10 12777223
    .Jack
    Electrician specialist
    elpapiotr wrote:
    Can not be ripped off !

    Well, only the company went bankrupt because it was doing too good.
  • #11 12777243
    MaleLampy
    Level 9  
    It is difficult for me to judge whether the Lord is joking or serious ;-) with historical beauty because I have no knowledge about it. It seems to me, however, that the lampholder is much younger than the entire lamp, because when I look at the holders of the pendant lamp (the latter) from my grandmother, where everything is original, the whole fitting looks completely different and is made of the same metals as the lamp .
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  • #12 12777252
    elpapiotr
    Electrician specialist
    I'm not kidding. I am writing seriously.
    After all, in x years, many frames have passed through my hands, and I know what they have looked like over the years.
  • #13 12777313
    MaleLampy
    Level 9  
    It is from your answers that I conclude that it would be worth inserting 3 wires, but I will not connect to the holder anyway, so there is 2 wire left, as speedy9 wrote (thank you for that) 2x0.75mm?.

    In some time I will get an older lamp from my friend from France, from the first years of electrification, I wonder how it will be there with the lampholder :-) .
  • #14 12777341
    serwisor
    Level 29  
    Nevertheless, we recommend you 3 wires, because you will always find the place of connection, and you will increase security, you will increase it.
  • #15 12777588
    MaleLampy
    Level 9  
    Out of curiosity, I checked whether another table lamp that I had given to replace the cable in the lamp renovation workshop (also equally old and all metal) had 3 or 2 wires. The plug is of a German type with plates to connect the third wire to the socket, like the 3 in the first row in the picture:
    What cross-section of the cable to the lamp, the bulb max 100W.
    Unfortunately, after unscrewing the plug, it turned out that it was just a dummy (really [too] expensive) ... and inside we have 2 wires.

Topic summary

The discussion revolves around replacing the power supply cable for an old table lamp and a pendant lamp, both requiring specific cable cross-sections due to their wattage. For the table lamp with a maximum bulb wattage of 100W, a 2x0.75mm² cable is suggested, while for the pendant lamp with five 75W light sources, a 3x1.5mm² cable is recommended. Concerns about safety and the necessity of a protective conductor are raised, especially given the age and materials of the lamps. The importance of ensuring proper insulation and the potential risks of using older components are emphasized. The discussion also touches on the compatibility of plugs and the need for additional protective measures when dealing with older electrical fixtures.
Summary generated by the language model.
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