JonC Posted November 17, 2020 Share Posted November 17, 2020 Right here’s one for you clever bastards that understand elastictrickery. I’ve just received a new radar, the power cable has red and blue, which are the power connections and the outer braid that is woven looking like it wants to connect to something. Where should it go? The handy guide book makes no reference to it. Quote Link to comment Share on other sites More sharing options...
JonC Posted November 17, 2020 Author Share Posted November 17, 2020 Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 4 minutes ago, JonC said: Is that not a pull cord for stripping the black sheathing back? If not, I reckon that’s how you should use it 👍🏻 JonC 1 Quote Link to comment Share on other sites More sharing options...
Andy135 Posted November 17, 2020 Share Posted November 17, 2020 Shielding sheath I reckon, to prevent interference. Geoff 1 Quote Link to comment Share on other sites More sharing options...
JonC Posted November 17, 2020 Author Share Posted November 17, 2020 Just now, Andy135 said: Shielding sheath I reckon, to prevent interference. The wiring diagram upon closer inspection shows it going to ground. What should I use for ground? Quote Link to comment Share on other sites More sharing options...
Andy135 Posted November 17, 2020 Share Posted November 17, 2020 I can't say I've ever grounded a shield wire before, but if your diagram requires it, then I suppose it should connect to the negative bus/battery terminal. Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 4 minutes ago, JonC said: The wiring diagram upon closer inspection shows it going to ground. What should I use for ground? A big iron rod hammered into the ground! 👍🏻 Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 8 minutes ago, Andy135 said: Shielding sheath I reckon, to prevent interference. Surely that would have to completely cover at least one of the wires? Quote Link to comment Share on other sites More sharing options...
JonC Posted November 17, 2020 Author Share Posted November 17, 2020 1 minute ago, Saintly Fish said: A big iron rod hammered into the ground! 👍🏻 Is that why the cable is so long? Quote Link to comment Share on other sites More sharing options...
Andy135 Posted November 17, 2020 Share Posted November 17, 2020 7 minutes ago, Saintly Fish said: Surely that would have to completely cover at least one of the wires? Jon said it was the "outer braid" so I'm assuming it covers both cables. It will absorb interference for however much of the cables are covered, so the more coverage the better, but full coverage not essential. Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 4 minutes ago, Andy135 said: Jon said it was the "outer braid" so I'm assuming it covers both cables. It will absorb interference for however much of the cables are covered, so the more coverage the better, but full coverage not essential. Looks like just a braid running in the sheath. Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 14 minutes ago, JonC said: Is that why the cable is so long? You got it. Think of the fuel you’ll save. Sounds like a sensible purchase to me! Quote Link to comment Share on other sites More sharing options...
Andy135 Posted November 17, 2020 Share Posted November 17, 2020 1 minute ago, Saintly Fish said: Looks like just a braid running in the sheath. I agree that the pic isn't clear, but as the manual says it needs to be grounded, it can only be a shielding sheath. @JonC, there are a couple of different interpretations of "ground" on a 12v boat system. The perfect solution is to install a separate copper grounding plate and wire the shield to that, so that it is isolated from the DC negative. The "good enough" solution is to just use the negative terminal. A third option (apparently recommended by Furuno) is that if you don't already have a copper ground plate installed, then leave the shield disconnected, as connecting to negative battery post can sometimes pick up signal noise from the other hardware connected to that circuit. So the choice, as our Graham says, is yours... Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 3 minutes ago, Andy135 said: I agree that the pic isn't clear, but as the manual says it needs to be grounded, it can only be a shielding sheath. @JonC, there are a couple of different interpretations of "ground" on a 12v boat system. The perfect solution is to install a separate copper grounding plate and wire the shield to that, so that it is isolated from the DC negative. The "good enough" solution is to just use the negative terminal. A third option (apparently recommended by Furuno) is that if you don't already have a copper ground plate installed, then leave the shield disconnected, as connecting to negative battery post can sometimes pick up signal noise from the other hardware connected to that circuit. So the choice, as our Graham says, is yours... Cilla your Aunty ? She’s a Ginge too. Quote Link to comment Share on other sites More sharing options...
Andy135 Posted November 17, 2020 Share Posted November 17, 2020 Just now, Saintly Fish said: Cilla your Aunty ? She’s a Ginge too. 🤣🤣🤣🖕 Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted November 17, 2020 Share Posted November 17, 2020 2 minutes ago, Andy135 said: 🤣🤣🤣🖕 Maybe that’s what you could call your boat. Quote Link to comment Share on other sites More sharing options...
JonC Posted November 17, 2020 Author Share Posted November 17, 2020 Quote Link to comment Share on other sites More sharing options...
JonC Posted November 17, 2020 Author Share Posted November 17, 2020 There is definitely only one set of shielding wires Quote Link to comment Share on other sites More sharing options...
suzook12 Posted November 17, 2020 Share Posted November 17, 2020 Yep Jon, connected to ground one end only.... As your boat is GRP, go for neg busbar as Andy suggested Quote Link to comment Share on other sites More sharing options...
JonC Posted November 18, 2020 Author Share Posted November 18, 2020 10 hours ago, suzook12 said: Yep Jon, connected to ground one end only.... As your boat is GRP, go for neg busbar as Andy suggested Thanks, I’ll give that a go when I fit it and see what happens Quote Link to comment Share on other sites More sharing options...
captin slows old outlaw Posted November 18, 2020 Share Posted November 18, 2020 i hope it all goes well.when you fit it Quote Link to comment Share on other sites More sharing options...
JonC Posted November 18, 2020 Author Share Posted November 18, 2020 3 minutes ago, captin slows old outlaw said: i hope it all goes well.when you fit it No smoke hopefully! Quote Link to comment Share on other sites More sharing options...
captin slows old outlaw Posted November 18, 2020 Share Posted November 18, 2020 🤣 new microwave maybe Quote Link to comment Share on other sites More sharing options...
Odyssey Posted November 18, 2020 Share Posted November 18, 2020 You’ll need to terminate at one end of the sheild. It’s to protect electrical interference radiating from your radar or interference disrupting your radar. terminate to your 0V bus bar or the 0V power line to your receiveer/MFD. Don’t use chop block etc a proper crimped/soldered connection is needed for that one Quote Link to comment Share on other sites More sharing options...
JonC Posted November 18, 2020 Author Share Posted November 18, 2020 8 hours ago, Odyssey said: You’ll need to terminate at one end of the sheild. It’s to protect electrical interference radiating from your radar or interference disrupting your radar. terminate to your 0V bus bar or the 0V power line to your receiveer/MFD. Don’t use chop block etc a proper crimped/soldered connection is needed for that one Thanks Luke. it’s not a data cable, it’s a WiFi radar only has 12vt power supply. Quote Link to comment Share on other sites More sharing options...
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