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Safely Check Live Wires without Meter: Detect Phase Wire & Avoid Short Circuit

Dzonzi 53442 30
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 17216432
    Dzonzi
    Level 12  
    I would like to check which wire is in phase. How to do it safely so that a short circuit does not occur without any specialized device?
    Of course, there will be no current flowing through the wire, so there will be no field either.
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  • #2 17216442
    stanislaw1954
    Level 43  
    Dzonzi wrote:
    I would like to check which wire is in phase. How to do it safely so that a short circuit does not occur without any specialized device?
    The voltage indicator is not a specialized device and costs a few zlotys.
  • #3 17216473
    Dzonzi
    Level 12  
    It costs PLN 20-30, the same as the worst-class multimeter.
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  • #4 17216553
    Rezystor240
    Level 42  
    Dzonzi wrote:
    I would like to check which wire is in phase. How to do it safely so that a short circuit does not occur without any specialized device?


    Try to use a neon pointer.
    Its cost will not exceed PLN 3.
  • #5 17218544
    Akrzy74
    Rest in Peace
    Dzonzi wrote:
    that there is no short circuit without any specialized device?

    By applying each certified device adapted to measure or presence of voltage, there will be no short circuit provided that the measurements are made by a person who is aware of the dangers and knows the basics of electrical measurements
    Dzonzi wrote:
    without any special device?

    In certain instructions, the electrician has to prove that the workplace is free from hazardous / voltage hazards and does so by touching the back of his hand to the live part, having first checked that there is no voltage. This "works" more than a voltage indicator, but you should think about it, and be sure if it is:
    Dzonzi wrote:
    relatively safe

    Please don't experiment, because cemeteries are full of heroes in their homes.
  • #6 17218882
    Borutka
    Level 29  
    Dzonzi wrote:

    Of course, there will be no current flowing through the wire, so there will be no field either.

    There is no current and there is no phase. Both ends of the cable are not connected, so what to look for?
  • #7 17218903
    Dzonzi
    Level 12  
    Just because there is no current, does not mean that there is no voltage.
  • #8 17218916
    kkknc
    Level 43  
    The instrument must be there. Is cheap.
    Safely Check Live Wires without Meter: Detect Phase Wire & Avoid Short Circuit
  • #9 17218949
    Borutka
    Level 29  
    Dzonzi wrote:
    Just because there is no current, does not mean that there is no voltage.

    I understood the question differently. I assumed that you had heard about neon lights a long time ago.
  • #10 17222928
    fotzsyzrk
    Level 12  
    The least complicated device and the most professional is the light bulb ;) and preferably 2 in a row from household appliances, enclosed in a hard drawer, with probes brought out. But maybe it's better to buy this so-called neon lamp for the 3 PLN
  • #11 17857710
    vodiczka
    Level 43  
    fotzsyzrk wrote:
    The least complicated device and the most professional one is a light bulb, preferably 2 in a row
    To check
    Dzonzi wrote:
    in which wire is phase.
    one 230V is enough. The neon lamp can sometimes be misleading.
  • #12 17857952
    retrofood
    VIP Meritorious for electroda.pl
    vodiczka wrote:
    one 230V is enough.
    It is enough or not. If you have access only to one wire, what will the bulb show?
  • #13 17858032
    vodiczka
    Level 43  
    retrofood wrote:
    If you only have access to one wire, what will the bulb show?
    The question was as follows:
    Dzonzi wrote:
    I would like to check wherein the line is in phase. How to do it safely so that a short circuit does not occur without any specialized device?
    Even with access to two wires, you can not check which wire is in phase with the bulb. You will only check if it is in one of them. To check where, you need access to "zero", be it a water pipe or a CO pipe
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  • #14 17858035
    retrofood
    VIP Meritorious for electroda.pl
    vodiczka wrote:
    Even with access to two wires, you can not check which wire is in phase with the bulb. You will only check if it is in one of them. To check where, you need access to "zero", be it a water pipe or a CO pipe
    Exactly. Compare your entry now in post # 11.
  • #15 17858167
    vodiczka
    Level 43  
    retrofood wrote:
    Exactly. Compare your entry now in post # 11.
    I compared (the record was a response to post # 10) and I still say that one bulb is enough in this particular situation. I cited in post # 11 a fragment of the author of the topic, which clearly shows that there are more wires than one.
    Your post # 12 "If you only have access to one cable" is worth more or less as much as the famous dialogue from "Teddy": And if here the old woman went to the old people's home and this house would not exist yet ... and today it would be you, you would have run over the old woman, yes? AND THIS CAN BE YOUR MOTHER !!!
    -How can I run my mother on the highway when MY MOTHER IS SITTING IN THE BACK ???
  • #16 17858484
    retrofood
    VIP Meritorious for electroda.pl
    vodiczka wrote:
    retrofood wrote:
    Exactly. Compare your entry now in post # 11.
    I compared (the record was a response to post # 10) and I still say that one bulb is enough in this particular situation. I cited in post # 11 a fragment of the author of the topic, which clearly shows that there are more wires than one.
    Your post # 12 "If you only have access to one cable" is worth more or less as much as the famous dialogue from "Teddy": And if here the old woman went to the old people's home and this house would not exist yet ... and today it would be you, you would have run over the old woman, yes? AND THIS CAN BE YOUR MOTHER !!!
    -How can I run my mother on the highway when MY MOTHER IS SITTING IN THE BACK ???

    Don't use demagoguery. I wrote the post because I was in a situation where there was no access to wires (or it was not sure which N is), and the owner of the object did not allow the paint to be scraped inside the switchgear door frame to check the voltage in relation to PE. So these are real life situations. So please stop spamming.
  • #17 17858576
    vodiczka
    Level 43  
    retrofood wrote:
    So these are real life situations. So please stop spamming.
    You still don't want to understand that I referred to the situation presented by the author .
    Although you wrote the truth in post # 12, your remark did not bring anything new to the topic.
    In addition, you did not surprise me that I wrote about one bulb in response to:
    fotzsyzrk wrote:
    The least complicated device and the most professional one is the bulb a preferably 2 in series from home appliances,
    My point was that two bulbs are needed when checking a three-phase installation> e.g. the possibility of connecting a light bulb between L1 and L2. When checking a single-phase installation, 1 light bulb is enough.

    Going back to my joke, which you called spam: How can I have access to only one cable if I have access to two :?: :D
  • #18 17859260
    CYRUS2
    Level 43  
    vodiczka wrote:
    In addition, you were not surprised that I wrote about one light bulb
    Dzonzi wrote:
    I would like to check which wire is in phase.
    This is a difficult question for these "light bulb experts".
    This can not be done with a light bulb.

    A trivial and simple question, nonsensical texts of experts on Elektroda.
    Another polemic, whether one bulb or two.
  • #19 17859582
    vodiczka
    Level 43  
    CYRUS2 wrote:
    This can not be done with a light bulb.
    Will do, buddy :) My late An electrician from Fonica, a Vilnius native by birth, Greek by his ancestors, always carried two 15W bulbs in his bag, connected in series with long probes.
    https://www.elektroda.pl/rtvforum/topic3125911.html#15211365
    Two - because the industrial installation was three-phase and I still have one at home - a gift from him.
  • #20 17859595
    stanislaw1954
    Level 43  
    CYRUS2 wrote:
    Dzonzi wrote:
    I would like to check which wire is in phase.
    This is a difficult question for these "light bulb experts".
    This can not be done with a light bulb.
    Is it impossible to determine the presence of a phase in the wire with only a light bulb? It is well known that in order for the bulb to light, you need a second wire from the bulb to connect to the PEN, or "zero". With a few meters of insulated wire with you, you can find a water pipe, central heating installation, socket pin (active), etc.
  • #21 17859663
    vodiczka
    Level 43  
    stanislaw1954 wrote:
    Having a few meters of insulated wire with you, you can find a water pipe somewhere, a central heating installation,
    > see post # 13 :|
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  • #22 17859692
    stanislaw1954
    Level 43  
    vodiczka wrote:
    Even with access to two wires you will not check with the bulb which wire is in phase . You will only check if it is in one of them. To check where, you need access to "zero", be it a water pipe or a CO pipe
    I don't understand this paragraph. Having two wires, for example, sticking out of the box, and one has a phase, then by applying the bulb to each of these wires separately and the other end of the bulb to the "foreign" mass (water supply, CO, etc.), you are not able to say that this is phase, including not?
  • #23 17859699
    CYRUS2
    Level 43  
    stanislaw1954 wrote:
    The voltage indicator is not a specialized device and costs a few zlotys.
    You wrote correctly.
  • #24 17859707
    vodiczka
    Level 43  
    stanislaw1954 wrote:
    I don't understand this paragraph
    Why? I wrote clearly:
    vodiczka wrote:
    To check where, you need access to "zero", be it a water pipe or a CO pipe
    You called it "foreign mass"
  • #25 17859737
    CYRUS2
    Level 43  
    vodiczka wrote:
    To check where, you need access to "zero", be it a water pipe or a CO pipe
    You cannot do this with a light bulb.
  • #26 17859784
    vodiczka
    Level 43  
    CYRUS2 wrote:
    You cannot do this with a light bulb.
    Can you justify it?
  • #27 17859903
    CYRUS2
    Level 43  
    vodiczka wrote:
    CYRUS2 wrote:
    You cannot do this with a light bulb.
    Can you justify it?
    You feed 230V through the bulb cold filament resistance - to an unknown tube or other component.
    Accidental people can electrocute.
  • #28 17859923
    stanislaw1954
    Level 43  
    CYRUS2 wrote:
    You give 230V through the cold filament resistance of the bulb - to an unknown pipe or another item.
    Accidental people can electrocute.
    On the blocks, these unknown pipes (water supply, central heating) are well protected, because there is even a good practice, for example, of bridging the water meter, so no one is in danger here.
  • #29 17859984
    CYRUS2
    Level 43  
    stanislaw1954 wrote:
    On the blocks, these unknown pipes (water supply, central heating) are well protected, because there is even a good practice, for example, of bridging the water meter, so no one is in danger here.
    Have you checked these pipes?
    You cannot publicly approve of breaking the security rules.

    The pipes do not need to have resistance continuity up to the last floor.
    It is not even measured.
  • #30 17860064
    stanislaw1954
    Level 43  
    CYRUS2 wrote:
    You cannot publicly approve of breaking the security rules.

    You're right and you've never done such a thing.
    "Who is blameless, let him throw a stone first" is a quote for those who are spotless.
    CYRUS2 wrote:
    The pipes do not need to have resistance continuity up to the last floor.
    It is not even measured.
    Because and why, after all, pipes are used to supply homes with water or heat (CO).

Topic summary

The discussion revolves around safely identifying live phase wires without specialized equipment. Various methods are suggested, including using a voltage indicator, neon pointer, or light bulb. While some participants argue that a single bulb can indicate the presence of voltage, others emphasize the necessity of having a second wire or grounding reference to accurately determine the phase. Caution is advised against experimenting without proper knowledge, as improper handling can lead to dangerous situations. The consensus is that while inexpensive tools can be used, understanding electrical principles is crucial for safety.
Summary generated by the language model.
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