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Discuss how do you find out which wire is which in lighting circuits? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

M

mrsonic`

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greetings

is there a device out there that can identify which wire is which in 2 way circuits? for example, if your lamp outside is controlled by a 2 way switch upstairs and downstairs, and you want to know which wire upstairs and downstairs is L1.
Is a continuity tester suitable for this investigation? how about disconnecting mains, go to the switch upstairs, put alternative power in wire that goes in L1 (about 20-30 volts) and then go downstairs and check which wire has 20-30 v running through it, using volt meter?
 
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R

Reg Man

  • Thread Starter Thread Starter
  • #2
Short each leg to the CPC and use a continuity test. Simple
 
K

KFORDHUNTER

  • Thread Starter Thread Starter
  • #5
Seriously man just cut the seals, oh sorry wrong thread.

To check which wire is which mate , wait what am i sayin, is this thread a joke.

By the way i have never seen a seal they are always missin, honest;)
 
P

piggyitm

  • Thread Starter Thread Starter
  • #6
I hate been the one to ask silly questions but where are you going to get the 20-30v from????
 
B

Bane

  • Thread Starter Thread Starter
  • #7
I didn't ask this question...

*Holds hands up*

"Honest"
 
R

rumrunner

  • Thread Starter Thread Starter
  • #8
you dont have to turn the power off to do a continuity test ,the meter just lasts longer if you do
 
G

greekislandlover

  • Thread Starter Thread Starter
  • #9
What's the outside lamp got to do with the price of cheese?

Sorry - don't understand the question, but I do agree that calling in a sparky might be a good idea.
 
J

jibspark

  • Thread Starter Thread Starter
  • #10
out of intrest why do you want to know this?
 
J

jibtech

  • Thread Starter Thread Starter
  • #11
more to the point how did you get the name mr sonic...oh wait i know
 
W

weyboy

  • Thread Starter Thread Starter
  • #13
do continuity test, in my case I'll use my pet beetle to hop on the cable one end and get him to follow the cable to the other end, job done...:D
 
J

jibspark

  • Thread Starter Thread Starter
  • #14
and won't the cores be the same colour either end?!!
 
S

Shakey

  • Thread Starter Thread Starter
  • #15
bet this chap is thinking "miserable bas***ds"

we are a fickle lot arent we

if somebody starts a post with "this might be a stupid question but....." they also get back slapped and told "there are no stupid questions ....etc etc"

wheras if they just dive straight in, they get shot down in flames.....:confused:

in answer to the question

yes youu should be able to tell by the colours.

if its two way, whatever is in common one end should be in common at the other, the strappers dont matter which way around.

If in doubt, isolate (unless you're Rum:D) and con check.
 
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