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Mult Lights on one Switch/Relay question

Discussion in 'Lighting' started by StAndrew, Oct 2, 2013.

  1. Oct 2, 2013 at 5:00 PM
    #1
    StAndrew

    StAndrew [OP] Wait for it...

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    Currently have two LED's on a relay/switch rated at 2.25A @12V, 1.125A @24V.

    Im about to purchase two more and will put them on a separate relay but want them on the same switch. Is this possible/advisable? Thanks.

    How would the wiring work?
     
  2. Oct 2, 2013 at 5:16 PM
    #2
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    Why are you using a separate relay? They could easily be put on the same relay. The switch shouldn't be handling the same power as the relay regardless.

    If you're set on using 2 relays and the same switch, just split the wire that goes from the switch to the relay you have installed now, and wire it to both relays. The rest of the wiring for the relay is the same as the one that you have currently installed. Again though, this is a complicated way of doing things, one relay will work fine.
     
  3. Oct 2, 2013 at 5:24 PM
    #3
    StAndrew

    StAndrew [OP] Wait for it...

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    You think so? I did some searching/reading before posting and the recommendation was separate relays for multiple lights :notsure:.

    Yeah, it would be 100% easier to splice into the other light wiring...
     
  4. Oct 2, 2013 at 5:27 PM
    #4
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    A standard auto relay will handle 30 amps, some are even rated for 40 amps. I would only use a second relay if you're using multiple switches. The only benefit I see with using multiple relays like you mentioned would be to prevent a single point of failure (but the switch would be regardless). If you have 4 lights and 4 relays, if one relay goes out, you only lose one light vs. one relay goes and you lose all your lights. Simple solution though, carry a spare relay.

    Your switch should only be triggering the relay. It shouldn't matter if the relay is pushing 3 amps or 30 amps, the draw on the switch shouldn't change if it's wired properly.
     
  5. Oct 2, 2013 at 5:30 PM
    #5
    StAndrew

    StAndrew [OP] Wait for it...

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    Awesome thanks.
     
  6. Oct 2, 2013 at 5:32 PM
    #6
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    No problem, good luck!
     

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