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Old 06-02-2014, 07:14   #1
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Wiring a DC Outlet Socket

Planning to install two 12V DC outlets in the saloon.
These are Bulgin sockets similar to ones in the below link, which accept a 2 pin plug.

Bulgin Plug & Low Flange Socket B-DP2 10Amp 2 Pin

Question, is there a standard convention as to where the positive and negative wires connect to the socket.
In the UK, a standard wall mounted power socket (240V AC) is wired with the positive on the left hand side (as viewed from the front of the socket), and the negative on the right.
Does something similar apply to 12V DC circuits??
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Old 06-02-2014, 07:30   #2
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Re: Wiring a DC Outlet Socket

Quote:
Originally Posted by nigel1 View Post
Planning to install two 12V DC outlets in the saloon.
These are Bulgin sockets similar to ones in the below link, which accept a 2 pin plug.

Bulgin Plug & Low Flange Socket B-DP2 10Amp 2 Pin

Question, is there a standard convention as to where the positive and negative wires connect to the socket.
In the UK, a standard wall mounted power socket (240V AC) is wired with the positive on the left hand side (as viewed from the front of the socket), and the negative on the right.
Does something similar apply to 12V DC circuits??
If the 240 AC is positive and negative oriented as you describe... Are you reversing the plug 50 times per second???
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Old 06-02-2014, 07:37   #3
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Re: Wiring a DC Outlet Socket

Not sure about the standard, but it appears that the socket you selected is keyed so I don't know if it matters.
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Old 06-02-2014, 08:06   #4
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Re: Wiring a DC Outlet Socket

Yep, its keyed, so if plug and socket are correctly wired I wont be able to get the polarity wrong, but, if there is a correct standard, I'd like to use that.
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Old 06-02-2014, 08:18   #5
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Re: Wiring a DC Outlet Socket

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Originally Posted by HappyMdRSailor View Post
If the 240 AC is positive and negative oriented as you describe... Are you reversing the plug 50 times per second???
Better terms would be live, and neutral. Neutral stays around ground, while live cycles from positive to negative.
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Old 06-02-2014, 08:37   #6
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Re: Wiring a DC Outlet Socket

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Better terms would be live, and neutral. Neutral stays around ground, while live cycles from positive to negative.
Whew!

Good thing... I thought Nigel was one of the shell game dude's for a second... My bad too as our (US) 240 is 2 live... Not so with the Euro...
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Old 06-02-2014, 08:46   #7
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Re: Wiring a DC Outlet Socket

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Originally Posted by HappyMdRSailor View Post
If the 240 AC is positive and negative oriented as you describe... Are you reversing the plug 50 times per second???

Thanks, I stand corrected, poor description on my part, live and neutral it is then.
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Old 06-02-2014, 08:56   #8
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Re: Wiring a DC Outlet Socket

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Thanks, I stand corrected, poor description on my part, live and neutral it is then.
My fault too for jumping the gun with the US standard for 240!

Not finding a standardized convention would leave me wiring it with with Red=Right staring at the socket...

Of course I would lie awake nights in a cold sweat too with the conflict of knowing that the return path is on the left hand side screwing with the colreg convention...
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Old 06-02-2014, 09:10   #9
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Re: Wiring a DC Outlet Socket

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Originally Posted by HappyMdRSailor View Post
My fault too for jumping the gun with the US standard for 240!

Not finding a standardized convention would leave me wiring it with with Red=Right staring at the socket...

Of course I would lie awake nights in a cold sweat too with the conflict of knowing that the return path is on the left hand side screwing with the colreg convention...
Maybe I'll go with that, we all have to live dangerously at times
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Old 06-02-2014, 09:12   #10
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Wiring a DC Outlet Socket

Quote:
Originally Posted by MarkSF View Post
Better terms would be live, and neutral. Neutral stays around ground, while live cycles from positive to negative.
Neutral may not be ground connected and in Europe can be going floating


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Old 06-02-2014, 09:55   #11
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Re: Wiring a DC Outlet Socket

Yes always treat neutral as if it is deadly. All sorts of things can result in it being live... saw it 50V w.r.t. ground in S.Korea once.
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Old 07-02-2014, 10:20   #12
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Re: Wiring a DC Outlet Socket

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Maybe I'll go with that, we all have to live dangerously at times
I like the enthusiasm! Damn the torpedoes....

You never know.... 20 years from now they may be referring to the "Nigel Convention" on wiring DC low voltage connectors...
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Old 07-02-2014, 10:26   #13
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Are the pins different sizes if so I think its standard put the positive on the bigger pin. at least that's the way it is with auto pilots I've used
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Old 07-02-2014, 10:41   #14
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Just looked on Amazon and the Attwood trolling motor plugs have the positive on the right if you're looking at the socket face. Well I just realized that it depends on which way the socket is mounted. So long as you do all the plugs and sockets the same way. You should be fine.
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Old 07-02-2014, 11:07   #15
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Re: Wiring a DC Outlet Socket

This is DC, there is no neutral just positive and negative.
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