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Relay and the amperage going to the on/off switch

Discussion in 'Lighting' started by Cthulhu, Oct 31, 2018.

  1. Oct 31, 2018 at 1:50 PM
    #1
    Cthulhu

    Cthulhu [OP] The White and Black Goat of the Woods

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    Good afternoon, I PROMISE I looked for about an hour, but can't find an answer to this question on the interweb. I figured my knowledgeable friends on this forum, especially those familiar with LED light bar set-ups, can help me out!

    I am buying a 60A relay harness to use for multiple LED light bars, which utilizes only one on/off switch. It comes with a lighted on/off switch, but instead of using that one, I'd like to use one of the switches I had previously purchased (see link below), so that all my switches aesthetically look the same, i.e., non-lighted.

    All of my light bars will be pulling a combined 42A, so the relay itself should be fine.

    My question is this...the power wire that goes out of the relay to the on/off switch...will that be carrying 41A, or is the amperage "stepped down" in the relay, and the amperage is lower going to the on/off switch? I've searched and I can't seem to find where product descriptions for relays show what the outgoing amperage is, only what amperage it can handle (i.e. 40A, 60A, etc.). I just want to make sure the on/off switch I want to use in the link below can handle the juice coming from the relay, and avoid burning my Tundy to the ground!! Thanks all!!

    https://www.amazon.com/gp/product/B00VU381FW/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
     
  2. Oct 31, 2018 at 3:52 PM
    #2
    papasmurf

    papasmurf Savage Fabrication

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    No the 12 volt lead from the switch to the relay will only carry about 1-3 amps it’s just the trigger wire to trigger the relay... it’s low amps you can use 12-18 gauge wire for that.. for the main coming off the relay going to the light bars you should use 10-8 gauge for 40-50 amps you will be pushing.
     
    Cthulhu[OP] likes this.
  3. Oct 31, 2018 at 3:53 PM
    #3
    papasmurf

    papasmurf Savage Fabrication

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    Op shoot me a pm and I can draw you the circuit how it should be wired
     
  4. Oct 31, 2018 at 5:44 PM
    #4
    Cthulhu

    Cthulhu [OP] The White and Black Goat of the Woods

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    These answers were perfect guys! Thanks so much for your responses!!
     
    NewImprovedRon likes this.
  5. Oct 31, 2018 at 5:48 PM
    #5
    Cthulhu

    Cthulhu [OP] The White and Black Goat of the Woods

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  6. Nov 1, 2018 at 1:32 AM
    #6
    Cthulhu

    Cthulhu [OP] The White and Black Goat of the Woods

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    Ron, quick question, since the 2-prong on/off switch isn’t lighted, I really don’t need a ground wire going to it, right? Isn’t a ground/3-prong on/off switch design really only necessary if it is lighted?
     
  7. Nov 1, 2018 at 7:53 AM
    #7
    Cthulhu

    Cthulhu [OP] The White and Black Goat of the Woods

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    Thank you kind sir!!
     
    NewImprovedRon likes this.
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