???

[Cj24]

Hi, just left a job which goin back to tomoz but as was leavin the customer asked I could look at her tiolet light so did quick and it was ya simple one way sw, at the light there was a twin and at sw a twin but when the light sw is off there is no power on either core at sw but wen u sw it on yes the light comes on and one of the cores at sw is then live, I belled from sw to light and the black from the sw goes up to N at light but the live don't, so obv they sent N to sw which is serving no purpose but the live don't bell through so obv assuming there is a jb somewhere but don't know if I bein thick but for some reason can't think why u only gettin power to sw wen u turn it on and not perm feed at it with sw wire out, sorry if u lost the story abit after how much iv typed dwn any help would be great, I pretty sure it simple but I must be brain dead

 

[Paul.M]

Is it a switched neutral?

 

[RogertheBodger]

Why did she ask you to check it? was it not working.

 

[tony mc]

Go with Paul M switching the neutral

 

[Deleted member 9648]

If you've only got a twin at each point there must be a JB,find that and all will be revealed no doubt.......beyond that sorry,but the text speak defeated me

 

[ezzzekiel]

beyond that sorry,but the text speak defeated me

me too

 

[tony mc]

If you have a neutral at the switch then it has to be switching the neutral or you would get a dead short if the other wire came live at the switch, Thats if I fully understand what you have asked.

I take it belled is a continuity test so you have a neutral at the switch

 

[Deleted member 26818]

Why not swop the conductors round?

 

[Mark_Burgess]

me too

And me

 

[Kamikaze]

me too

And me

 

[Cj24]

Sorry about my text if it's bad, yes continuity from N at sw to N at the light, and what I can't seem to figure out is why is there nothing live at sw until you actually turn the sw on. And why would you sw your N at a normal 1 way light, surely just need a perm live and sw live,

 

[armbands0]

Sorry to be an old groaner but I struggle to read that text speak stuff, my brain is constantly trying to correct for what look loike spelling errors

 

[Deleted member 26818]

This is a prime example of one of the reasons the neutral should never be switched.
Consider what voltages you would expect to get between conductors on a live circuit.
L to N, L to E and N to E.

 

[Cj24]

Dont understand how and why there is no voltage at switch until you actually operate the switch, surely there should always be voltage there

 

[tony mc]

There is no voltage because neutral is at 0 volts until you switch on the light where it now completes the circuit that is why the neutral is a live conductor.

You are switching the neutral at the switch and is very dangerous and needs to be rectified ASAP SpinLondon has explained what readings you would get.

This is why we have to test for polarity.

All fuses and single pole switches and protective devices are in the line conductor ONLY