Expressing conductor size?

Discussion in 'Math' started by Seenimegha, Jul 23, 2013.

  1. Seenimegha

    Thread Starter New Member

    Jul 10, 2013
    Why the conductor sizes are termed in rather than diameter(in mm)?
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
    Firstly because not all conductors are circular in section.

    Secondly many conductors are not even a single wire they are made from several (even many) small wires. The 'Area' in this case is not the true cross section but an equivalent that is correct in electrical terms.

    Finally what is the relationship between the resistance of a conductor and its dimensions?
    Does area not play a vital part?
    aamir_uetn likes this.