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Recommended splice for 6 to 8 ga. wire?

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  • Recommended splice for 6 to 8 ga. wire?

    I need to splice some 6 ga. wire to 8 ga. wire on my boat. I can't find any Shrink Tube Butt Connectors in this size. I found some regular Vinyl-insulated Butted Seam Barrel Terminals in 6 ga. that would work and I guess I could shrink some of the adhesive-lined shrink tube around it to keep out the moisture. Anybody have a better idea?

    If I use a plain old vinyl crimp butt connector, what size adhesive lined shrink tube should I get to shrink over it but still seal against the underlying 6 and 8 ga. wires?

    Thanks!


  • #2
    Re: Recommended splice for 6 to 8 ga. wire?

    youll have to get the size that will fit over the butt connector, and add a little more heat to shirink the small end.
    FLORIDA GATORS
    TEBOW Country



    Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
    That is what these forums are for. Post your questions, in the appropriate Forum.

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    • #3
      Re: Recommended splice for 6 to 8 ga. wire?

      Be sure to use quality shrink tube. There is allot of junk tube out there. Learned my lesson wiring the trailer....twice.
      my 2cents.
      "Your results may vary"

      Thundercraft in Progress
      http://forums.iboats.com/showthread.php?t=287390

      Tri-hull Wiring
      http://forums.iboats.com/showthread.php?t=448376

      Comment



      • #4
        Re: Recommended splice for 6 to 8 ga. wire?

        You may want to look into cold fusion tape. It's used in the utilities (electrical, natural gas). I have found it in Menards,; but an electrical supply house will carry it.

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        • #5
          Re: Recommended splice for 6 to 8 ga. wire?

          Don't overlook liquid electrical tape for a final seal.
          sigpic

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          • #6
            Re: Recommended splice for 6 to 8 ga. wire?

            Alpha shrink tubing is good stuff. Comes in all the sizes and you can go with 6:1 shrink ratio or a 3:1 shrink. You can get it with or without glue. Newark electronics sells it . this link will take you to the newark site for heat shrink tubing . http://www.newark.com/jsp/search/results.jsp?N=0&Ntk=gensearch_001|gensearch_001&Nt t=shrink+tubing|heat+shrink&Ntx=&D=shrink+tubing+h eat+shrink

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            • #7
              Re: Recommended splice for 6 to 8 ga. wire?

              Tony, I would use marine-grade butt connectors and crimp and solder them. Then pull the shring tube over them and shrink it, and cover the edges with liquid electrical tape.

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              • #8
                Re: Recommended splice for 6 to 8 ga. wire?

                LOL at Chris. Are you sure he don't need some conduit too?

                Comment



                • #9
                  Re: Recommended splice for 6 to 8 ga. wire?

                  Hey Marc, If you don't solder and waterproof the connection, it will fail. I have had a marine-grade battery cable turn to blue paste in less than 4 days, in my saltwater environment.

                  If he follows your advice, then the question is, "where do you(or he) want to be when that conection fails?"

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                  • #10
                    Re: Recommended splice for 6 to 8 ga. wire?

                    Solder and seal!

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                    • #11
                      Re: Recommended splice for 6 to 8 ga. wire?

                      How would I solder this thick wire? It is not pre-tinned marine grade wire. The trolling motor manufacturers don't provide pretinned wire.

                      In a previous job I used to solder much smaller size wire. It seems like it would take a LOT of heat to get the wires hot enough to take solder. The insulation would start melting.

                      Comment



                      • #12
                        Re: Recommended splice for 6 to 8 ga. wire?

                        Just an FYI, It is my understanding that the ABYC guidelines recommend crimped and heatshrinked connectors. They are specific not to recommend solder. But I cannot remember why. ABYC is the standard that most builders use. Personally I have used both methods when the situation dictates.
                        "Your results may vary"

                        Thundercraft in Progress
                        http://forums.iboats.com/showthread.php?t=287390

                        Tri-hull Wiring
                        http://forums.iboats.com/showthread.php?t=448376

                        Comment



                        • #13
                          Re: Recommended splice for 6 to 8 ga. wire?

                          Tony, Work some solder paste (flux) into the strands of the wire, and use a 60 watt soldering iron or a propane torch. Just a touch from the torch should do you. Use rosin core solder.

                          As for the non-recommended use of solder. The crimp-type butt connections are vapor tight and superior to solder, if crimped properly, using the correct tools. Since I have neither the correct tools or the correct technique, I use solder.

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                          • #14
                            Re: Recommended splice for 6 to 8 ga. wire?

                            ABYC says no solder cause the wire at the solder point can become britttle from the heat -induced temper and break due to vibration. Solder and seal (shrink wrap and liquid electrical tape)Is the best permanent,LOW RESISTANCE,method of connecting continuous,high current load,unlike wire size splices.(In my opinion and experience.)Done correctly,and secured against flexing(aka vibration)Its forever!

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                            • #15
                              Re: Recommended splice for 6 to 8 ga. wire?

                              I just spliced some new batt cables together for my big Merc OB. Home Depot has some aluminum blocks (in the same section with the butt splices)..that are about inch or so long, with a set screw on both ends. I cannot think just what they are called, but come in different sizes for the bigger wire. They are the same things that connect your house wire on the pole to your rain cap somewhere along the line, only those are much bigger. I simply stuffed the stripped wire in there, cranked down the set screw, wrapped in some 1/8 thick rubber I have, taped up good, and zero problems. If it works out in the rain for decades, I see know problem on boats cables if done right

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