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Old 30 September 2013, 11:13   #1
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Breaking into a wire?

What's the RIBnet approved way of 'breaking into' a wire, i.e., adding a 'tee' or 'wire' into an existing wire?

I wouldn't use sotchloks on a boat (and they are not my favourite things anyway).

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Hugh
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Old 30 September 2013, 11:27   #2
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Quote:
Originally Posted by HughN View Post
What's the RIBnet approved way of 'breaking into' a wire, i.e., adding a 'tee' or 'wire' into an existing wire?

I wouldn't use sotchloks on a boat (and they are not my favourite things anyway).

Thanks
Hugh
Can't think of any good use for scotchlocks, other than chucking in the bin safest bet is to cut the cable you want to tee into, bare all three ends, then tin them, slide some heat shrink tubing over one end, then solder all threes ends together, then slide the heat shrink over the joint, heat it up and job done! but if you can, much better to take the new end back to an existing connection, makes a far better job and makes for much easier fault finding in the future
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Old 30 September 2013, 11:38   #3
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Why do you need to "T" into an existing wire at all? What's the source wire and what are the new wires feeding?
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Old 30 September 2013, 12:41   #4
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Joining into the middle of a cable is not the preferred way of creating an additional spur. But if you really have to then as mentioned earlier cut solder and heat shrink (adhesive type is best).
Keeping circuits separate and running from a new point in the distribution is a better way especially where fuses are involved.
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Old 30 September 2013, 13:07   #5
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Joining into the middle of a cable is not the preferred way of creating an additional spur. But if you really have to then as mentioned earlier cut solder and heat shrink (adhesive type is best).
Keeping circuits separate and running from a new point in the distribution is a better way especially where fuses are involved.
The new wire are to tap into the NMEA from the GPS. The wire from the DSC radio hangs temptingly close to a wire passing nearby. To extend that wire to an end would be awkward from a routing point of view. I think this translates as "I am lazy"
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Old 30 September 2013, 13:09   #6
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A crimp is also a good way to join your three wires together but only is you have a good crimping tool. You can then slide over your heat shrink for added protection/insulation.
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Old 30 September 2013, 13:14   #7
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Quote:
Originally Posted by HughN View Post
The new wire are to tap into the NMEA from the GPS. The wire from the DSC radio hangs temptingly close to a wire passing nearby. To extend that wire to an end would be awkward from a routing point of view. I think this translates as "I am lazy"
What flavour of NMEA is it? AFAIK you can't just "T" in to a NMEA0183 data cable or N2k for that matter.
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Old 30 September 2013, 13:15   #8
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Quote:
Originally Posted by HughN View Post
The new wire are to tap into the NMEA from the GPS. The wire from the DSC radio hangs temptingly close to a wire passing nearby. To extend that wire to an end would be awkward from a routing point of view. I think this translates as "I am lazy"
sounds like a plan that you may well live to regret in the future, you know you should be doing a proper job and it will be much harder to sort out when its cold, wet and dark
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Old 30 September 2013, 13:17   #9
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What flavour of NMEA is it? AFAIK you can't just "T" in to a NMEA0183 data cable or N2k for that matter.
Whatever the spec might say it works in practise! As long as one of the receivers doesn't drag the voltage down it seems OK. Its asynchronous after all and the transmitter doesn't care who is listening.
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Old 30 September 2013, 13:47   #10
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I've had to T into 2 cables on the Ballistic.I didn't like doing it, but there wasn't an option apart from sticking busbars in where they weren't practical.

I did it by very carefully removing the insulation from one, twisting the bare end of the other round it as flat as possible and soldering the connection. I covered it with glue lined heatshrink after.

If you use decent glue lined heatshrink it'll take up and seal where the 2 wires exit as well.
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