Shop OBEX P1 Docs P2 Docs Learn Events
Wire Resistance Chart — Parallax Forums

Wire Resistance Chart

ArchiverArchiver Posts: 46,084
edited 2004-01-03 08:33 in General Discussion
Hi guys,

a little off topic here,

I lost my Hard drive and some stuff on it. I had a chart that listed
the resistance of one foot of wire for common sizes.

Can anyone offer where to find those resistances ?

Thanks,

Dave

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 14:19
    Hi, Dave here you are.

    http://www.physics.montana.edu/edl/documents/edlpages/
    copperwiretable.htm

    Sid


    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 14:31
    At 02:05 PM 1/2/04 +0000, Dave Mucha wrote:
    >Hi guys,
    >
    >a little off topic here,
    >
    >I lost my Hard drive and some stuff on it. I had a chart that listed
    >the resistance of one foot of wire for common sizes.
    >
    >Can anyone offer where to find those resistances ?

    Here they are for AWG 4 through AWG 28:
    http://www.epanorama.net/documents/wiring/wire_resistance.html


    >Thanks,
    >
    >Dave

    Bruce
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 14:39
    Dave, This attached page is from the ARRL Handbook 2002.
    Larry

    Dave Mucha <davemucha@j...> wrote:
    Hi guys,

    a little off topic here,

    I lost my Hard drive and some stuff on it. I had a chart that listed
    the resistance of one foot of wire for common sizes.

    Can anyone offer where to find those resistances ?

    Thanks,

    Dave



    To UNSUBSCRIBE, just send mail to:
    basicstamps-unsubscribe@yahoogroups.com
    from the same email address that you subscribed. Text in the Subject and Body of
    the message will be ignored.


    Yahoo! Groups Links

    To visit your group on the web, go to:
    http://groups.yahoo.com/group/basicstamps/

    To unsubscribe from this group, send an email to:
    basicstamps-unsubscribe@yahoogroups.com

    Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/



    Do you Yahoo!?
    Find out what made the Top Yahoo! Searches of 2003

    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 15:41
    Specific copper resistance Rc : 0.018 ohm mm²/m
    then: R= Rc*L/S with
    R in ohms for a given length and gauge
    Rc as above
    L length in meter
    S gauge in mm²
    Regards
    ECO
    Original Message
    From: "Dave Mucha" <davemucha@j...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, January 02, 2004 3:05 PM
    Subject: [noparse][[/noparse]basicstamps] Wire Resistance Chart


    > Hi guys,
    >
    > a little off topic here,
    >
    > I lost my Hard drive and some stuff on it. I had a chart that listed
    > the resistance of one foot of wire for common sizes.
    >
    > Can anyone offer where to find those resistances ?
    >
    > Thanks,
    >
    > Dave
    >
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 15:53
    In a message dated 1/2/2004 9:07:37 AM Eastern Standard Time,
    davemucha@j... writes:


    > Can anyone offer where to find those resistances ?
    >

    Hi, Dave

    Got enough wire charts yet [noparse]:)[/noparse])


    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 17:09
    --- In basicstamps@yahoogroups.com, "ECO" <ecourt@b...> wrote:
    > Specific copper resistance Rc : 0.018 ohm mm²/m
    > then: R= Rc*L/S with
    > R in ohms for a given length and gauge
    > Rc as above
    > L length in meter
    > S gauge in mm²
    > Regards
    > ECO


    The above calc's work but the resistivity of copper (or whatever the
    wire is made from) is needed.

    I found a similar expression,

    R=r l/A,

    R = Resistance
    r = resistivity of wire (Cu is 10.4 CM-W /ft)
    l = length of section
    A = area, in mils of wire

    The resistivity of Cu is 10.4 CM-W /ft, but is standard copper wire
    100% copper or is it some type of alloy ?

    also...

    Anybody have a good schematic for measuring very low resistances ?
    It seems a little late to ask for an LCR meter for a present.


    Dave
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-02 18:27
    --- In basicstamps@yahoogroups.com, Newzed@a... wrote:
    > In a message dated 1/2/2004 9:07:37 AM Eastern Standard Time,
    > davemucha@j... writes:
    >
    >
    > > Can anyone offer where to find those resistances ?
    > >
    >
    > Hi, Dave
    >
    > Got enough wire charts yet [noparse]:)[/noparse])


    Pretty close.


    The one you offered has details on ampacity as regards wire lenght.

    Another link, the one from Burce;
    http://www.epanorama.net/documents/wiring/wire_resistance.html

    talkes about the general rule is 6% voltage drop is permitted, or the
    max, not exactly sure, still reading. : )


    Dave


    >
    >
    > [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-03 08:33
    Dave
    The resistivity of pure copper(98%) is taken in account by the Rc coefficient.
    As exemple, it is 0.03 for aluminium and 0.1 for nickel.
    Regards
    ECO

    Original Message
    From: "Dave Mucha" <davemucha@j...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, January 02, 2004 6:09 PM
    Subject: [noparse][[/noparse]basicstamps] Re: Wire Resistance Chart


    > --- In basicstamps@yahoogroups.com, "ECO" <ecourt@b...> wrote:
    > > Specific copper resistance Rc : 0.018 ohm mm²/m
    > > then: R= Rc*L/S with
    > > R in ohms for a given length and gauge
    > > Rc as above
    > > L length in meter
    > > S gauge in mm²
    > > Regards
    > > ECO
    >
    >
    > The above calc's work but the resistivity of copper (or whatever the
    > wire is made from) is needed.
    >
    > I found a similar expression,
    >
    > R=r l/A,
    >
    > R = Resistance
    > r = resistivity of wire (Cu is 10.4 CM-W /ft)
    > l = length of section
    > A = area, in mils of wire
    >
    > The resistivity of Cu is 10.4 CM-W /ft, but is standard copper wire
    > 100% copper or is it some type of alloy ?
    >
    > also...
    >
    > Anybody have a good schematic for measuring very low resistances ?
    > It seems a little late to ask for an LCR meter for a present.
    >
    >
    > Dave
    >
Sign In or Register to comment.