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Navigation switch and related fuse

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  • Navigation switch and related fuse

    Ok got most of the right fuses for everything else done . Iam going to use the setup found on the site here to do the bow and stern light http://forums.iboats.com/electrical-...es-506306.html

    Iam using Led type for both lights , what size fuse should i use on the fuse block for it ? from the picture id go from fuse block to the center post of the switch , and the 2 center posts are jumped correct ?

    Iam also considering doing this to the 2 led lights inside the boat aswell , any reason not to ?

  • #2
    Re: Navigation switch and related fuse

    Originally posted by Shallowman View Post
    Ok got most of the right fuses for everything else done . Iam going to use the setup found on the site here to do the bow and stern light http://forums.iboats.com/electrical-...es-506306.html

    Iam using Led type for both lights , what size fuse should i use on the fuse block for it ? from the picture id go from fuse block to the center post of the switch , and the 2 center posts are jumped correct ?

    Iam also considering doing this to the 2 led lights inside the boat aswell , any reason not to ?
    Hi Shallowman. I'd install about a 5 amp fuse. 5 amps is smaller than the ampacity rating of the wire (assuming at least #16 AWG) and much larger than the load that the LED's will draw. This would provide a safe installation that isn't likely to let you down on the water.

    Yes, the two centre posts are joined by a jumper wire (this enables power to both the nav light and the all-round light circuits).

    The 2 LED lights inside the boat could be controlled by a simple single pole single throw (SPST) switch that has only 2 terminals. The switch for the nav lights and all-round light in the diagram is more complex, being a double pole double throw (DPDT) with centre off position. This gives you the option of having only the all-round light on when anchored, but nav lights and all-round light on when travelling, all controlled by one switch. - Grandad
    Last edited by Grandad; September 19th, 2013, 08:19 AM. Reason: Corrected typo
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    • #3
      Re: Navigation switch and related fuse

      On a DTDP switch, the jumper goes from output to output on the 'stern light' side of the switch. The input poles are jumped internally ...
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      • #4
        Re: Navigation switch and related fuse

        Originally posted by Outsider View Post
        On a DTDP switch, the jumper goes from output to output on the 'stern light' side of the switch. The input poles are jumped internally ...
        No they don't. A DPDT switch is two separate switches inone housing operated by a single actuator. The line side is wired externally just like the load side.

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        • #5
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          Re: Navigation switch and related fuse

          Did I get the first part correct?

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