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accidentally cut off 24 pin ATX power connector and want to reattach, question

Discussion in 'Power Electronics' started by jon5500, Jan 26, 2021.

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  1. jon5500

    jon5500

    70
    3
    Oct 31, 2020
    I accidentally cut off the 24 pin ATX power supply connector because I thought I was going to use the power supply for another purpose, but that turned out not to be the case. I want to reinstall back into the desktop, but I have a question: since all the red, yellow, orange, and black wires were going to be combined (for greater current handling in non-PC use), I am wondering if I could just combine the same color cutoff wires from the connector with the ones coming from the power supply? Would sure save a lot of extra soldering. For example, in case I'm not clear, can I combine all the orange wires from the supply and all the orange wires from the connector and solder together? Thanks in advance.
     
  2. Martaine2005

    Martaine2005

    3,214
    883
    May 12, 2015
    Generally speaking, yes you can.
    You’ll notice that all the ‘orange’ wires are grouped and soldered to a single bus line.
    So in theory, it won’t matter what ‘orange’ +3.3V wire you connect to any +3.3V pin on the connector.

    But you’d be better to solder each one and insulate with heat shrink.

    Martin
     
  3. jon5500

    jon5500

    70
    3
    Oct 31, 2020
    Thanks. I was about to proceed with the wire combining until I saw this statement. Why? It is maybe because there would be too much potential for excess current flow in the combined lines?
     
  4. Martaine2005

    Martaine2005

    3,214
    883
    May 12, 2015
    Whatever the amperage on each rail is, will be the max whether one wire or 10 wires.
    The connector has several wires of the same voltages because they split off and go to various parts of the circuit.
    You can solder them all together with no ill affect but will be very unsightly.

    But make sure all the wires you solder together are definitely from the same rail. Check they are all bunched together and soldered to the same place on the board.

    Martin
     
    Last edited: Jan 27, 2021
  5. jon5500

    jon5500

    70
    3
    Oct 31, 2020
    Ok, thanks.
     
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