Double 14AWG wiring gauge

Discussion in 'Electrical Forum discussion & Blog' started by chefwong, Sep 10, 2012.

  1. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    Two 14's double up = how many gauge.
    12 gauge or 11 gauge.


    This is not for electrical.....
    I'm need to buy a crimp connector sleeve and need to determine it based on a doubled up 14awg
  2. Speedy Petey

    Speedy Petey Licensed Electrical Contractor

    Messages:
    992
    Location:
    NY State, USA
    There is no cross reference. You'd have to use the tables in the back of the NEC to get the actual diameter of the conductors.
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,947
    Location:
    New England
    [TABLE="width: 75%, align: center"]

    [TR]
    [TD]
    Gauge​
    [/TD]
    [TD]
    Inches (decimal)​
    [/TD]
    [TD]
    Inches (fractional)​
    [/TD]
    [TD]
    Millimeters​
    [/TD]
    [/TR]
    [TR]
    [TD]
    20​
    [/TD]
    [TD]
    .032​
    [/TD]
    [TD]
    approx. 1/32"​
    [/TD]
    [TD]
    .812​
    [/TD]
    [/TR]
    [TR]
    [TD]
    18​
    [/TD]
    [TD]
    .040​
    [/TD]
    [TD]
    > 1/32"​
    [/TD]
    [TD]
    1.024​
    [/TD]
    [/TR]
    [TR]
    [TD]
    16​
    [/TD]
    [TD]
    .051​
    [/TD]
    [TD]
    < 1/16"​
    [/TD]
    [TD]
    1.291​
    [/TD]
    [/TR]
    [TR]
    [TD]
    14​
    [/TD]
    [TD]
    .064​
    [/TD]
    [TD]
    approx. 1/16"​
    [/TD]
    [TD]
    1.628​
    [/TD]
    [/TR]
    [TR]
    [TD]
    12​
    [/TD]
    [TD]
    .081​
    [/TD]
    [TD]
    > 1/16"​
    [/TD]
    [TD]
    2.053​
    [/TD]
    [/TR]
    [TR]
    [TD]
    10​
    [/TD]
    [TD]
    .102​
    [/TD]
    [TD]
    < 1/8"​
    [/TD]
    [TD]
    2.588​
    [/TD]
    [/TR]
    [TR]
    [TD]
    8​
    [/TD]
    [TD]
    .128​
    [/TD]
    [TD]
    approx. 1/8"​
    [/TD]
    [TD]
    3.264​
    [/TD]
    [/TR]
    [TR]
    [TD]
    6​
    [/TD]
    [TD]
    .162​
    [/TD]
    [TD]
    > 1/8"​
    [/TD]
    [TD]
    4.115​
    [/TD]
    [/TR]
    [TR]
    [TD]
    4​
    [/TD]
    [TD]
    .204​
    [/TD]
    [TD]
    < 1/4"​
    [/TD]
    [TD]
    5.189​
    [/TD]
    [/TR]
    [TR]
    [TD]
    2​
    [/TD]
    [TD]
    .258​
    [/TD]
    [TD]
    approx 1/4"​
    [/TD]
    [TD]
    6.544​
    [/TD]
    [/TR]

    [/TABLE]
  4. ballvalve

    ballvalve General Engineering Contractor

    Messages:
    3,261
    Location:
    northfork, california
    Very handy chart, can you get a few more larger sizes under the 2?
  5. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    How does that translate to combined. For example, I know the quad 16ag I use, the combined dual 16's = 13AWG
  6. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,947
    Location:
    New England
    [TABLE="width: 75%, align: center"]

    [TR]
    [TD]
    0​
    [/TD]
    [TD]
    .325​
    [/TD]
    [TD]
    5/16"​
    [/TD]
    [TD]
    8.251​
    [/TD]
    [/TR]
    [TR]
    [TD]
    00​
    [/TD]
    [TD]
    .365​
    [/TD]
    [TD]
    approx. 3/8"​
    [/TD]
    [TD]
    9.266​
    [/TD]
    [/TR]
    [TR]
    [TD]
    000​
    [/TD]
    [TD]
    .410​
    [/TD]
    [TD]
    7/16"​
    [/TD]
    [TD]
    11.110​
    [/TD]
    [/TR]
    [TR]
    [TD]
    0000​
    [/TD]
    [TD]
    .500​
    [/TD]
    [TD]
    1/2"​
    [/TD]
    [TD]
    12.710​
    [/TD]
    [/TR]
    [TR]
    [TD]
    9/16"​
    [/TD]
    [TD]
    .563​
    [/TD]
    [TD]
    9/16"​
    [/TD]
    [TD]
    14.287​
    [/TD]
    [/TR]
    [TR]
    [TD]
    5/8"​
    [/TD]
    [TD]
    .630​
    [/TD]
    [TD]
    5/8"​
    [/TD]
    [TD]
    15.875​
    [/TD]
    [/TR]
    [TR]
    [TD]
    3/4"​
    [/TD]
    [TD]
    .750​
    [/TD]
    [TD]
    3/4"​
    [/TD]
    [TD]
    19.050​
    [/TD]
    [/TR]
    [TR]
    [TD]
    7/8"​
    [/TD]
    [TD]
    .875​
    [/TD]
    [TD]
    7/8"​
    [/TD]
    [TD]
    22.225​
    [/TD]
    [/TR]
    [TR]
    [TD]
    1"​
    [/TD]
    [TD]
    1.000​
    [/TD]
    [TD]
    1"​
    [/TD]
    [TD]
    25.400​
    [/TD]
    [/TR]

    [/TABLE]
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,947
    Location:
    New England
    Don't know, but it seems like two 16g (each 0.051") would need an opening twice that, or a 10g capability (0.102").
  8. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    NO.
    Doubling up, does not make it *half* the wire rating.
    Just don't do it often enough to know.
    Found the answer - Two 14's = 11 AWG
  9. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,532
    Location:
    North Carolina
    I am not sure what you are trying but unless you show a reference to what you say I disagree.

    Two 14 AWG equals two 14 AWG as far as the code is concerned. And they can not be connected in parallel

    Would you mind explaining just what you are doing please.
  10. BobL43

    BobL43 DIY Senior Member

    Messages:
    1,792
    Location:
    Long Island, NY
    If it's not for electrical application, then you are using this to do what, hang a picture? :p
    Two conductors twisted and fastened d to a crimp type connector? Just twist them and measure the OD and pick from Jim's chart?
  11. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    Just making fancy speaker connections with my WBT crimp sleeves....

    Don't start the bare copper vs. connector debate ;-/
  12. ballvalve

    ballvalve General Engineering Contractor

    Messages:
    3,261
    Location:
    northfork, california
    For a guy with several miles of #6 and #10 wire, "doubling up" seems like a great use of material. I have done it on some wild mountain runs, and all works fine. Without any code babble, can you explain the practical danger inherent in parallel wires?
  13. Speedy Petey

    Speedy Petey Licensed Electrical Contractor

    Messages:
    992
    Location:
    NY State, USA
    I am not an engineer (thankfully), all I know is 310.4, then 310.10(H) says we CANNOT parallel conductors under 1/0.
    Here is the NEC Handbook commentary on it:
    310.10(H)(2) commentary:

    Since you say you hacked in a "wild mountain run" I am sure those looking to circumvent this part of the code will feel much better about themselves, as I am sure you do. :rolleyes:
  14. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,532
    Location:
    North Carolina
    heat .
  15. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    Whoa. Doubling up in high voltage :eek:


    The only time I've ever doubled up is with speaker wiring & when I needed to cheat and provide power to a alarm panel.
    Four 24AWG (aka - cat5 cable) combined - is equivalent to 18 gauge. It was cutting it close but it was just enough gauge to make it work WITH COM working as well..

    Doubled up speakers in world is my stash of QUAD 16awg and Quad 14 AWG cable....
    Which I use either as a pair or quads depending on application of amplification
    Last edited: Sep 13, 2012
  16. DonL

    DonL Banned

    Messages:
    3,995
    Location:
    Houston, TX
    I thought you were talking about size ?

    Jim is correct it is double in size.

    The size of stranded wire is different than solid.
  17. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,532
    Location:
    North Carolina
    Why would you want to parallel conductors for speakers? This is a very bad idea due to the resistance of the conductors that will have an effect on the amp.

    I always use stranded conductors for speakers due to eddie currents and would never for any reason install parallel conductors for any type of sound system.

    What size amp are you using? It must be big in order to use #14 AWG conductors.
  18. ballvalve

    ballvalve General Engineering Contractor

    Messages:
    3,261
    Location:
    northfork, california
    One may notice from that code quote on big conductors that a 50% increase in size brings only a 15% increase in conductivity. Is this the flow of electrons on the perimeter of the cable factor?

    Seems like the parallel cables would give more heat dispersing area...
  19. DonL

    DonL Banned

    Messages:
    3,995
    Location:
    Houston, TX

    In theory X 2 or 100% increase would give the wire 1/2 of the resistance and 1/2 of the voltage drop for the same length wire run.

    1/2 of the voltage drop would produce less heat, but there are a lot of other factors that affect wire temperature.

    When it comes to Audio and Paralleling speaker wires, Phasing is important.

    1 speaker can cancel the sound of another if not properly phased.


    I guess chefwong is hanging speakers with this wire, as he said "This is not for electrical....."
  20. big2bird

    big2bird IBEW Electrician

    Messages:
    141
    Location:
    Anaheim, Ca.
    When you use multiple runs to increase conductance, you must insure the impedence (total opposition to a/c current) is virtually identical. If they are not, you risk the overloading of the conductor with the least opposition to current flow.
    Therefore, a run of 1/0 minimum, identical length, identical connections is the minimum. It would be too difficult and unnecessary to ever do that for smaller circuits.
    When you get into kiloamps, it becomes necessary, as no practical cable is manufactured or easily installed.
    There are exceptions for voltage drop, such as high frequency applications, but the ampacity cannot be summed. I.E., you could parallel 14 gauge wire on a 400 cycle circuit to lower voltage drop, but it is still rated at 15 amperes maximum.
    I can rattle off more, or quote the exceptions if interested.
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