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Anyone good at electrics?

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haGGard
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Joined: 13 Oct 2004
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PostPosted: 23:14 - 04 Jul 2006    Post subject: Anyone good at electrics? Reply with quote

This shouldn't be too hard to answer, im just a n00b when it comes to basic electrics...

All i want to know is which one is the positive wire and which one is the negative wire, thats all...

https://img144.imageshack.us/img144/7182/dscf07244jo.th.jpg

I have a feeling the solid black one is negative and the black/white one is positive, that correct?

Its the wires from a transformer btw...
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Sparks!
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PostPosted: 23:21 - 04 Jul 2006    Post subject: Reply with quote

What sort of transformer is it? for halogen lights? if so it doesnt matter which way they go round, but don't quote me on that if thats for a different type of transformer...
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haGGard
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PostPosted: 23:25 - 04 Jul 2006    Post subject: Reply with quote

Its just a normal tyre of universal transformer, y'know the one that comes with different sized connectors, for different things like personal cd players etc, it has a voltage thing on top so i can vary the voltage from 1.5v - 12v ...

I accidently snapped the connector thing off tonight though, which is why you can see bare wire in the pic... still works if i can figure out which wire is which...
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True Blue
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PostPosted: 23:29 - 04 Jul 2006    Post subject: Reply with quote

I would think the solid colour would be the positive, but it's hard to say for sure without testing it. I've seen the striped core used for positive or negative. Have you not got a voltmeter you could use to test it?
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Last edited by True Blue on 23:29 - 04 Jul 2006; edited 1 time in total
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Sparks!
Sir Tart-a-lot



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PostPosted: 23:29 - 04 Jul 2006    Post subject: Reply with quote

haGGard wrote:
Its just a normal tyre of universal transformer, y'know the one that comes with different sized connectors, for different things like personal cd players etc, it has a voltage thing on top so i can vary the voltage from 1.5v - 12v ...

I accidently snapped the connector thing off tonight though, which is why you can see bare wire in the pic... still works if i can figure out which wire is which...


I'm pretty sure it doesn't matter Wink but the plain black is more likely to be the neutral... just wire it like that and see if it works.. won't do no harm just don't touch the wires...
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True Blue
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PostPosted: 23:30 - 04 Jul 2006    Post subject: Reply with quote

It will matter which one is which, depending what you plug it in to.
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mad4it028
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PostPosted: 23:31 - 04 Jul 2006    Post subject: Reply with quote

Im pretty sure the black and white wire is live but i would check with a multi meter just to be sure.
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Sparks!
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PostPosted: 23:32 - 04 Jul 2006    Post subject: Reply with quote

True Blue wrote:
It will matter which one is which, depending what you plug it in to.


nah just plug it in anyway Laughing Wink joke by way... check it with multimeter Razz i thought it was a light transformer and those definetly don't matter..
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True Blue
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PostPosted: 23:34 - 04 Jul 2006    Post subject: Reply with quote

Yeah, I would test it to be sure. If it was made outside of Europe (Likely) then it won't follow the normal standard as such for identifying the cores.
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Finglonga
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PostPosted: 23:38 - 04 Jul 2006    Post subject: Reply with quote

Jeebus you guys are scary when it comes to lectriks!?!? Shocked

Black is NEGATIVE(-) Black/grey is POSITIVE(+)
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True Blue
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PostPosted: 23:41 - 04 Jul 2006    Post subject: Reply with quote

Possibly, but not definately. The last one I looked at was the other way around. (I've connected lots) Wink
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haGGard
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PostPosted: 23:43 - 04 Jul 2006    Post subject: Reply with quote

Finglonga wrote:
Jeebus you guys are scary when it comes to lectriks!?!? Shocked

Black is NEGATIVE(-) Black/grey is POSITIVE(+)


Thats what i initially thought, i did electronics for a GCSE, but couldnt remember! Embarassed Laughing

Anyway, to cut a long story short, i dont have a multimeter to hand at the moment, but ive got some old PC cold cathode tubes spare which i know the red wire is (+) and the black wire is (-). I tested it on that, and yes, it turns out the white/black wire coming from the transformer is the positive one Very Happy

Thanks people! Very Happy Thumbs Up
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Finglonga
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PostPosted: 23:47 - 04 Jul 2006    Post subject: Reply with quote

True Blue wrote:
Possibly, but not definately. The last one I looked at was the other way around. (I've connected lots) Wink


It was wired up wrong then.....Black has been negative as long as I can remember, unless its an AC current....Then its both. Wink
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True Blue
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PostPosted: 23:50 - 04 Jul 2006    Post subject: Reply with quote

Finglonga wrote:
True Blue wrote:
Possibly, but not definately. The last one I looked at was the other way around. (I've connected lots) Wink


It was wired up wrong then.....Black has been negative as long as I can remember, unless its an AC current....Then its both. Wink


Aye, in the EU it is. Most of the crap electrical stuff bought nowadays are from places where they just make it up as they go. I fried a few lighting control modules before I learned this. Laughing
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stinkwheel
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PostPosted: 03:27 - 05 Jul 2006    Post subject: Reply with quote

Finglonga wrote:
Jeebus you guys are scary when it comes to lectriks!?!? Shocked

Black is NEGATIVE(-) Black/grey is POSITIVE(+)


Not on a Kawasaki wiring loom.
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The View Askew
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PostPosted: 04:08 - 05 Jul 2006    Post subject: Reply with quote

Depends which way they're connected at the other end now doesn't it Shocked .

I'd go with the solid for live, but there's always one.
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Finglonga
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PostPosted: 13:02 - 05 Jul 2006    Post subject: Reply with quote

stinkwheel wrote:
Finglonga wrote:
Jeebus you guys are scary when it comes to lectriks!?!? Shocked

Black is NEGATIVE(-) Black/grey is POSITIVE(+)


Not on a Kawasaki wiring loom.


Nor BMW, brown is negative but thats a mains transformer. Wink
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feef
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PostPosted: 17:33 - 05 Jul 2006    Post subject: Reply with quote

Finglonga wrote:
True Blue wrote:
Possibly, but not definately. The last one I looked at was the other way around. (I've connected lots) Wink


It was wired up wrong then.....Black has been negative as long as I can remember, unless its an AC current....Then its both. Wink


i've had cheap far-eastern power supplies that have been wired up both ways, and that was several items in the same batch of identical units Very Happy

a
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True Blue
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PostPosted: 18:39 - 05 Jul 2006    Post subject: Reply with quote

I'm not sure that there is a standard for ELV. I think the line down one cable is just there to distinguish between the 2.
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Finglonga
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PostPosted: 22:52 - 05 Jul 2006    Post subject: Reply with quote

AAaaoowwww Feck it.....Put it on the 2volt setting and put both wires on your tongue at the same time(don't let them touch together), the one that tingles is positive. Wink
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