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Calculating multi-strand wires

Discussion in 'Rebuildable Mods and Devices' started by Andy S, Jan 18, 2019.

  1. Andy S

    Andy S Postman

    Aug 2, 2018
    Likes Received:
    This query is prompted by the fact that the online coil calculator I'm using includes heat flux and heat capacity.

    I believe that a twin stranded wire - e.g. a simple twist - has half the resistance of a single strand and can therefore be treated as a pair of single strand coils in parallel. However, I worked out the cross sectional area of two strands of 24g and found that it was the same as a single strand of 21g, and sure enough when I plug in the numbers for a dual coil build of single strand 24g the calculator gives very similar results to a single coil of 21g in terms of resistance and wire length, but the heat capacities are very different and the calculator predicts different voltages to achieve the same heat flux. The calculator can do multiple coils but only knows about single strand wires, so my question is if I'm making for example a single coil using a 24g twist, should I tell the calculator it's a dual 24g or a single 21g?
  2. zouzounaki

    zouzounaki Legend

    Dec 13, 2016
    Likes Received:
    Dual 24g I would think.
  3. mattyk2010

    mattyk2010 Veteran

    Aug 6, 2016
    Likes Received:
    My answer would be stop using steam engine coil wrapping and use the wire wizard section where you can add the relevant information and not try to trick a calculator as it offers no benefit to you, add the correct information get the correct answer, try to bypass the correct information and end up with the wrong results which is pointless
    • Like Like x 4
  4. wraith

    wraith Achiever

    Nov 15, 2014
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    Worth mentioning that the wire wizard is available on the Steam Engine website but not the Android app.
    • Like Like x 1

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