Live to earth 25ac live to neutral 230 could anyone help

[Darrens14]

I am currently redoing a kitchen, (electrics) I tested voltage at lighting cable and form brown>blue-230ac
Brown>earth I got 25ac could anyone shed some light on this please

 

[buzzlightyear]

I am currently redoing a kitchen, (electrics) I tested voltage at lighting cable and form brown>blue-230ac
Brown>earth I got 25ac could anyone shed some light on this please

where are you testing switch or light !

 

[Marvo]

Sounds dangerous like missing CPC maybe.
Are you a qualified sparky and what test equipment do you have?

 

[Darrens14]

I am testing at the lighting cable

 

[Darrens14]

I am an apprentice I am testing with a fluke t5-600

 

[Marvo]

Where exactly on the lighting cable?

 

[Darrens14]

It’s ran in pvc pvc singles I tested across brown/blue/earth I have 230 at brown blue and 25ac at brow/earth

 

[Marvo]

Doesn't really answer my question....are you testing at the switch or at a light fitting or at some random junction box somewhere? Is the wiring you're testing running between the CU and fitting or maybe the CU and the switch or possibly the switch and the light fitting?

 

[buzzlightyear]

I am an apprentice I am testing with a fluke t5-600

you should have some one looking over your shoulder when you are testing a give guidance.

 

[Darrens14]

I’m testing at the light fitting, apologies.. at the switch whoever previously wired it ran t&e into switch and must have done joints in ceiling

 

[buzzlightyear]

I am currently redoing a kitchen, (electrics) I tested voltage at lighting cable and form brown>blue-230ac
Brown>earth I got 25ac could anyone shed some light on this please

is any body paying you for this work ?

 

[Darrens14]

No, it is in my own home

 

[buzzlightyear]

No, it is in my own home

does your mum and dad know what you are doing ,like going to burn your house down &no p/l insurance .

 

[Darrens14]

I was only asking on this to see if I could get some help, if it was out of my knowledge I’d tell them I couldn’t do it I wouldn’t complete it not knowing what to do, that’s why I asked on this forum for help

 

[buzzlightyear]

I was only asking on this to see if I could get some help, if it was out of my knowledge I’d tell them I couldn’t do it I wouldn’t complete it not knowing what to do, that’s why I asked on this forum for hlep

is it not time you should be in bed reading a comic .

 

[Darrens14]

Okay thanks for the help pal!

 

[Wilko]

Hi - As Marvo has said it's likely cpc not continuous. Do you have a loop tester?

 

[Darrens14]

Okay thanks for the help pal!

 

[Wilko]

Hi - As Marvo has said it's likely cpc not continuous. Do you have a loop tester?

 

[Darrens14]

As in to test continuity?

 

[ipf]

o

is it not time you should be in bed reading a comic .

Come on buzz, the lad's a bit puzzled......it'll do him no good going to bed with a copy of the 18th edition....

 

[Deleted member 26818]

Another option, is that the polarity is reversed.
Test a socket, see what readings you get.

 

[Darrens14]

That’s what I was thinking, thanks a lot

 

[ipf]

Another option, is that the polarity is reversed.
Test a socket, see what readings you get.

True, and is the light switched on or off...is it a permanent live or switched? A few unknowns. Is there only one cable at the fitting? If so, odds are there's a nearby joint, of some kind.

 

[Wilko]

A bit of late night viewing on loop impedance testing

 

[Darrens14]

Switched I have taken the fittings down and have cables In connectors the way they were connected in light so nothing has changed (connection wise)

 

[buzzlightyear]

Try and test near the consumer on the lighting circuit and see what voltage between the line and cpc

 

[ipf]

Try and test near the consumer on the lighting circuit and see what voltage between the line and cpc

….is their a bunch of cables above the ceiling?...may be something amiss there. If it's a switch wire, that's the first thing to look at.

 

[Darrens14]

I will have a look tomorrow I have a feeling that could Be it.. it’s a single poll switch but whoever done it has blue in common brown in l1 earth in l2 so I’m thinking is the earth mixed in a junction box because it’s t&e at switch and pvc pvc singles in ceiling

 

[ipf]

Isolate first!!!!!!!!!! then you can check continuities.
Get some lever wagos for temp connections, then no mix ups.