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Copper Wire as simple BusBar

Discussion in 'General Electronics Discussion' started by mdcryan, Dec 15, 2015.

  1. mdcryan

    mdcryan

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    Dec 15, 2015
    Forgive basic questions but this is my first "Have a go " project!

    I have 10 strips of LED lights (12V with total pull of 9A).
    I have made a simple "busbar" by splaying high count 12AWG copper speaker wire, on the panel, and then connecting each of the LED strip to the two busbars (Positive to one side, negative to the other busbar).

    I want to attach the copper splayed wire / "busbar" to the panel (currently just stapled), with either adhesive tape or perhaps glue. I then want to insulate the busbar, either by covering each busbar with insulating tape or perhaps creating a raised perspex cover.

    My question: How do I calculate the potential heat in the busbar to make sure that either sticking it and/or covering it does not introduce any risks.
     
  2. dorke

    dorke

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    Jun 20, 2015
    You need to know the length of the wire.
    And the exact measurements of your construction.
    Better post a photo.
     
  3. Minder

    Minder

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    Apr 24, 2015
    12AWG is rated for 20amps, so you would have to exceed this to see any heating.
    M.
     
    Martaine2005 likes this.
  4. mdcryan

    mdcryan

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    Dec 15, 2015
    thanks
     
  5. mdcryan

    mdcryan

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    0
    Dec 15, 2015
    I've not constructed it yet! - but the LED strips are 75 cm long and there are 10 of them evenly spaced.
    The busbar is 25cms long and the total draw of all ten strips is 9 a (0.9A per strip)
     
  6. dorke

    dorke

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    Jun 20, 2015
    I suggest you use these kind of electric terminal blocks/strips.
    They are isolated.
    You can split them and use screws to connect the wires
    as well as screws to mount it.

    terminals.jpg
     
    Martaine2005 likes this.
  7. Martaine2005

    Martaine2005

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    May 12, 2015
    Your "bus bars" are just fine.. Solder them for a good connection.
    Or use the blocks that dorke suggested! Less chance of wire breakage if they are soldered though..
    As Minder said, "you can pretty much double what you are using now before the rated cable has any problems!..

    Martin
     
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