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-   -   Electronic dumb question: unmarked wire (https://www.revscene.net/forums/715271-electronic-dumb-question-unmarked-wire.html)

asian_XL 09-01-2018 07:20 AM
Electronic dumb question: unmarked wire
 
This is a LED ceiling light, is there a way to check which wire is positive or negative? if the wires are unmarked. Any easy way? Can a multimeter check ?

http://i65.tinypic.com/16lfaqr.jpg

jing 09-01-2018 08:30 AM
What is the input rating into that? If the driver is built in (which it looks to be judging by how massive it is), there's no polarity on the incoming AC feed. I'm no electrician, so take this with a grain of salt.

Ludepower 09-01-2018 08:52 AM
If OP doesnt reply back in an hour....send help!

tiger_handheld 09-01-2018 10:34 AM
the right side is positive.




:troll:

snowball 09-01-2018 11:59 AM
It is marked! The one with writing on it is usually the hot/positive side. The other wire usually doesn't have information because it's neutral.

AzNightmare 09-01-2018 01:54 PM
Just checking... is OP ok?

68style 09-01-2018 02:04 PM
OP lives in HK he’s probably sleeping... or this all went wrong and he’s dead

ae101 09-01-2018 02:11 PM
op rich he can just hire a guy for this job lol

Alby 09-01-2018 03:07 PM
Quote:
Originally Posted by snowball (Post 8917235)
It is marked! The one with writing on it is usually the hot/positive side. The other wire usually doesn't have information because it's neutral.
plot twist. other side of the unmarked wire has writing too!

cunninglinguist 09-01-2018 05:31 PM
Hook up the wires to a battery. Switch it up till it lights up.

Peturbo 09-01-2018 06:30 PM
LED light so it is just a diode. Just use a diode check/ohm meter setting on your DVOM. That'll tell you which is positive and which is negative.
If one direction shows no current flow or "OL", that means it's the other way around.

asian_XL 09-01-2018 08:04 PM
Quote:
Originally Posted by Peturbo (Post 8917264)
LED light so it is just a diode. Just use a diode check/ohm meter setting on your DVOM. That'll tell you which is positive and which is negative.
If one direction shows no current flow or "OL", that means it's the other way around.
Got it.

very regret to switch all lighting to LED at my parents' place.BibleThump

bcrdukes 09-01-2018 09:14 PM
240v RIP asian_XL

danned 09-01-2018 10:41 PM
should we cry?

mk1freak 09-01-2018 11:27 PM
I cri evertim :tears:

snowball 09-02-2018 01:23 AM
Quote:
Originally Posted by snowball (Post 8917235)
It is marked! The one with writing on it is usually the hot/positive side. The other wire usually doesn't have information because it's neutral.
You may also check to see if there is a stripe or "ribs" on one of the wires, this usually signifies that it is the neutral one.

I should also say that this is only my experience with north american AC power.

asian_XL 09-03-2018 03:08 AM
other units come with brown wire as ground and blue or red as positive. Whatever, I bought some new one at the end.

320icar 09-03-2018 09:12 AM
Inb4 OP digs up a grenade in his backyard

JesseBlue 09-03-2018 02:43 PM
no polarity on this sucka...usually one should be connected to neutral but because its so low wattage it didn't matter

Ulic Qel-Droma 09-04-2018 03:40 AM
uh after u check. you should get a permanent marker or some kinda sticker and mark it... so you dont go through this again LOL.

i dont deal with electricity. its one of my fears. LOL


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