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10-08-2021, 12:49
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#1
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Marine Service Provider
Join Date: Nov 2012
Location: Caribbean and PNW, used to be San Francisco Bay and California
Boat: Jeanneau 43 DS and Leopard 45
Posts: 526
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What kind of connector is this?
Anyone knows what kind of connector this is? It is on the transom of our recently bought boat and it has 12V DC in between the two pins. So one is DC +, the other is DC -, not sure what the third pin might be for.
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10-08-2021, 12:55
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#2
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Nearly an old salt
Join Date: Jun 2009
Location: Lefkas Marina ,Greece
Boat: Bavaria 36
Posts: 22,801
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Re: What kind of connector is this?
typically called a TREM waterproof connector, via available through chandleries , the is a 35mm dia and a 40mm but the 35mm is more common
__________________
 Interested in smart boat technology, networking and all things tech
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10-08-2021, 13:26
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#3
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Registered User
Join Date: Jan 2017
Location: Brussels (Belgium)
Boat: Najad 373
Posts: 277
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Re: What kind of connector is this?
Third pin would be for ground, if that is relevant for the attached equipment.
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10-08-2021, 13:36
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#4
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Registered User
Join Date: May 2017
Location: NE Florida
Boat: 1980 Endeavour 32
Posts: 994
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Re: What kind of connector is this?
Or a ground and 2 different 12v positives. Common at mast bases for lights on the mast. It allows you to run two separate circuits, say one for the anchor light and one for a steaming light. Or one for a steaming light and one for a deck light.
Don't know offhand what it would be for at the stern...hmmm...
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10-08-2021, 14:13
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#5
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Marine Service Provider
Join Date: Nov 2012
Location: Caribbean and PNW, used to be San Francisco Bay and California
Boat: Jeanneau 43 DS and Leopard 45
Posts: 526
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Re: What kind of connector is this?
Thanks all, this is very helpful.
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10-08-2021, 15:33
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#6
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Registered User
Join Date: Nov 2012
Location: Long Beach, CA
Boat: Tayana Vancouver 42
Posts: 2,804
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Re: What kind of connector is this?
I had one in my cockpit that I think was for a handheld spotlight. It was the only thing on board that had the matching plug.
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10-08-2021, 19:57
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#7
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Registered User
Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,891
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Re: What kind of connector is this?
Quote:
Originally Posted by goboatingnow
typically called a TREM waterproof connector, via available through chandleries , the is a 35mm dia and a 40mm but the 35mm is more common
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TREM is a brand name and they make several similar connectors with different numbers of pins as well as different diameters. That looks like their 3-pin ""Waterproof socket 10 Amp (42mm)" or ""Waterproof socket 5 Amp (38mm)"
https://www.trem.net/spina-e-presa-stagna-10a.html
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10-08-2021, 20:31
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#8
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Registered User
Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 4,229
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Re: What kind of connector is this?
We have two on our boat, one for the windlass remote (probably not the OP’s on the transom), the other to connect some removable solar (a chance for that). Our windlass takes four pins, the solar only two, but it has a three-pin like the OP, probably because that was what the chandler had.
On the transom, maybe a tiller pilot that drives a windvane aux. rudder? Or an anchor light that gets hung on the backstay?
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11-08-2021, 13:12
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#9
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Marine Service Provider
Join Date: Feb 2012
Location: Vienna, Austria
Boat: Vagabond 47
Posts: 935
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Re: What kind of connector is this?
Quote:
Originally Posted by Tenedos
Anyone knows what kind of connector this is? It is on the transom of our recently bought boat and it has 12V DC in between the two pins. So one is DC +, the other is DC -, not sure what the third pin might be for.
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Windlass
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11-08-2021, 13:49
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#10
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Registered User
Join Date: Sep 2011
Location: Toronto
Boat: Grampian 26
Posts: 167
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Re: What kind of connector is this?
Mine powers my old tiller Auto Helm.
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