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Old 04-29-2008, 09:11 PM
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Default Best Method to Splice One Wire into Another

What's the best method to splice one 18ga wire into the middle of another 18ga wire? Is there some kind of 3-way connector that can be used? All the connectors on my boat are crimped and covered with adhesive lined heat shrink (no soldering and no wires twisted together) and I would like to maintain a similar standard.
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Old 04-29-2008, 10:39 PM
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Default Re: Best Method to Splice One Wire into Another

There are no marine three way connectors that I know of unless you want to use a stud & have each wire connectected to it by a ring terminal.

However, an easy way to insert a wire into another is to cut the receptor wire, trim the end of the new wire & one end of the receptor to expose the actual copper, then insert them into one end of a suitable size heat shrink butt connector (probably blue for two pieces of 18 ga). Now crimp them. You are left with a single wire that will not fit snugly into the other end of the butt connector as it is too small. Cut another short piece of 18 ga, strip it & the other piece of the receptor wire, slide the appropriate size heat shrink tube on, insert the short wire & the receptor wire into the butt connector, crimp & then heat to set the glue. Slide the heat shrink tube over the joint, heat & it is done.
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Old 04-30-2008, 04:47 AM
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Default Re: Best Method to Splice One Wire into Another

for wires that small, i would suggest soldering them. just strip off the jacket of the wire you are tapping into without actually cutting the wire. split the strands inside the wire apart, slide the new wire through the opening of the existing wire, then twist it all together and solder. then use some rubber splice tape to wrap up the connection.

http://www.galesburgelectric.com/sto...productid=6425

this way you havent cut anything, you have just tapped into it without compromising the original connection.
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Old 04-30-2008, 06:52 AM
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Default Re: Best Method to Splice One Wire into Another

I have not used these yet, but they look very promising to do exactly what you want. They're not too pricey, since you'd probably only need a few.

http://www.delcity.net/delcity/servl...=791845&page=1

Del City has been great with my past orders (although I think they require a $25 minimum order). I suspect if you call them and ask for just one piece as a sample, they'll send ti to you. Alternatively, buy a ratcheting crimper, which is a great tool to have in your box and is MUCh cheaper than (but identical to) the Anchor model sold at WM.
Ratcheting crimper:
http://www.delcity.net/delcity/servl...=665741&page=1
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Old 04-30-2008, 07:21 AM
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Default RE: Best Method to Splice One Wire into Another

They make crimp sleeves that have a large hole on one side and a smaller hole on the other for this purpose. You cut, and strip the three conductors and feed two wires in one end and one wire in the other and crimp. They are called step down butt splices. Here is a link:http://www.marinco.com/scpt/SectionP...yl%20Insulated . Or you can use a closed end butt splice and put all three conductors into it. If you lived closer I would give you a handfull of them b/c we have them at work, but I think the postage would make it not worthwhile.
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Old 04-30-2008, 05:55 PM
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Default Re: Best Method to Splice One Wire into Another

Thank you for the advice everyone - they are all good, workable solutions. Clam_Alert and Nitz, those connectors look perfect. I'll try to find somewhere I can get hold of one of those types. I'll probably end up ordering them from the U.S. anyway as the retailers here are unlikely to stock anything similar.
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