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stranded wire max.current

Discussion in 'General Electronics Discussion' started by dorf, Apr 7, 2015.

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  1. dorf

    dorf

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    Apr 7, 2015
    i would like to know what is strandet 22awg wire max. amp.
    i just can`t find any awg current chart in internet, what is made for stranded wire .
    For solid wire there is many charts.

    thank you :)
     
  2. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    The AWG rating on a stranded wire should account for it's overall cross-sectional area.
    A solid core wire with the same AWG marking will actually be a slightly smaller diameter.
    Additionally, the tables will usually provide a transmission and chassis rating, but these tables are not 100% accurate! This will depend on the actual chemical makeup of the wire you are using. You can't use a copper table for tin wire. Always give yourself some extra breathing room.
     
  3. Arouse1973

    Arouse1973 Adam

    5,164
    1,087
    Dec 18, 2013
    It can also depend on the acceptable voltage drop across a length of cable. This will also produce heating of the wire which would need to be factored in also.
    Adam
     
    Gryd3 likes this.
  4. shrtrnd

    shrtrnd

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    Jan 15, 2010
    I was going to take a shot at this, but realized the insulation on the wire is also a factor.
    You wouldn't by chance have a manufacturer's part number for your wire, would you?
    I'd be kind of interested in hearing what THEY have to say about this.
     
    hevans1944, Gryd3 and Arouse1973 like this.
  5. dorf

    dorf

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    Apr 7, 2015
    Thanks to all :)

    -cable is: JZ AWM 2464 22AWG VW-1 80°C 300V
    -This is (chinese made) 5.5mm x 2.1mm male / female Extension cord
    -lenght 3 meters
     
  6. shrtrnd

    shrtrnd

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    Jan 15, 2010
    The AWM 2464 is the Underwriters Laboratory rating for the 300V @ 80 degrees C.
    I checked the Alpha Wire Website and saw no references to amperage.
    I'd send them an email and ask them.. What you're going to get is a graph that shows a function of maybe Voltage/Wattage vs Temperature/Time.
    Alpha Wire isn't the only manufacturer, but I think that's probably your best resource for information.
    Tell them you're interesting in amp rating and see what they say.
     
  7. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    What are you trying to use it for, or hoping to be able to make it carry?
    22AWG is not very big... Many tables list anywhere from 1 to 7 Amps depending on intended purpose for Copper wire.
     
  8. dorf

    dorf

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    Apr 7, 2015
    i have different kinds of DC 12V projects, if know how much amps gable stand, i choose proper project for that.

    i make few "unscientific" calculation, if using 230v i get max 3.46 amps for that cable.
    ( when compare to 1.5mm² stranded rubber gable AC 230V / 16A fuse )
     
  9. Y2KEDDIE

    Y2KEDDIE

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    Sep 23, 2012
    For Stranded or Solid Standard Single Conductor PVC insulated tinned -copper wire, passes UL VW-1 Vertical flame test, CSA Certified, 300 VAC(UL 100701569):

    26 AWG 5A
    24 7
    22 10
    20 13
    18 18
    16 24
    14 33
    12 45
    10 58

    Reference: Mc Master Carr, Catalog 116, page 784
     
  10. BGB

    BGB

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    Nov 30, 2014
    from my experience (fairly limited, not had "that" many wires fry, at least unintentionally):
    7-10A seems like a good limit for 22 AWG wire (copper).

    though, running 6A through 22 AWG, or 4A through 24 AWG, voltage drop may be an issue (AFAICT: for a pair, ~ 1v every 4 feet or so). in this case, you want thicker wire or lower current (if maintaining voltage is important).


    for 24 AWG, 7A is about on the "starts getting hot fast" threshold, much over this and the wire gets very hot or burns up, so I stick more around 4A (where it stays pretty close to ambient), and has a little more room if things go over slightly.

    for 22 AWG, likewise for 10A. would probably keep it more about 6A or so.

    for 22 AWG aluminum (I have some of this), I have noted it seems to get hot slightly faster than 24 AWG copper. probably bad things would happen if used at 10A.


    insulation may matter some as well, where I have some 24 AWG wire (from some CAT 5e) with some very hardcore insulation (it is unaffected by solder or flames), so it can get good and hot and the insulation doesn't notice (flames give maybe some soot, and it is unaffected if touched by a hot soldering iron).

    however, some other wire I have has insulation which gets very gooey and sticky if it gets hot, and may blob right off the wire (leaving the conductor exposed) if it gets hot enough. this wire can't be pushed anywhere near as hard (need to try to keep it at near ambient temperatures). some of this may include the insulation melting if touched by a glue-gun, so care may be needed when hot glueing it, and the hot glue and insulation may end up merged to some extent (and contact with hot wires may leave molten plastic on ones' skin).
    (well, and the inner-wire is often off-center and there are no markings on the insulation).
     
  11. dorf

    dorf

    6
    0
    Apr 7, 2015
    In this case there is two 22awg cable inside of cable, so cable currrent is 2 x load amps ( i think so? negation amp?)
    maybe 3.46 amps is quite near to safe use.
     
  12. Tha fios agaibh

    Tha fios agaibh

    2,168
    727
    Aug 11, 2014
    Better to size the cable bigger and err on the side of safety. I would also make the following considerations;
    What is the duration of the amperage?
    Are you talking about a few seconds of peak current, or a continuous load for hours?
    What is the ambient temperature surrounding the wire?
    Are you bundling multiple lengths of conductors together where hysterisis heating could be an issue?
     
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