Strange things at callout

[ThrownRazor25]

Was at a callout today kettle plugged into cooker control switch was not working and neither was the cooker.Unplugged the kettle and put my megger in and im getting 248v.Disconnected the cooker and getting the same at the outlet.Changed both the switch and outlet and rcbo however still the kettle or cooker does not work.Tried other appliances in the socket too and they dont work either yet still getting 248v .

Any thoughts?

 

[buzzlightyear]

L-N? L-E?

 

[snowhead]

There's a joint / connection somewhere in the cable that's failing under load.

 

[buzzlightyear]

they dont work either yet still getting 248v .

neutral out !

 

[buzzlightyear]

Changed both the switch and outlet and rcbo

?????????

 

[Dannyg8810]

?????????

Replace everything and hope for the best??

Has any testing been carried out on the cables??

 

[buzzlightyear]

Replace everything and hope for the best??

Has any testing been carried out on the cables

he's now thinking about it.

 

[ThrownRazor25]

Lol funny guys on here ok tell me whats going on then?

Yes i done an ir test between l/n,l/e and n/e all of which cam back greater than 299mohm.

I am getting 248v between l/n and l/e.

 

[ThrownRazor25]

And buzzlightyear why would a neutral out result in me getting 248 between l/n?

 

[buzzlightyear]

Was at a callout today kettle plugged into cooker control switch was not working and neither was the cooker.Unplugged the kettle and put my megger in and im getting 248v.Disconnected the cooker and getting the same at the outlet.Changed both the switch and outlet and rcbo however still the kettle or cooker does not work.Tried other appliances in the socket too and they dont work either yet still getting 248v

what you put in the first post ,we are not mind readers you know .

 

[buzzlightyear]

may be the appliances have not any fuses in !

 

[ThrownRazor25]

Are you for real?

 

[Daniel Oake]

Keep us updated when you find the problem, interested to hear what the problem was please.

 

[buzzlightyear]

Are you for real?

you are the one, is testing on site .if you have say 248volt at the end of the circuit ,and tested IR299 on l/n l/e what was n/e ?

 

[telectrix]

think snowhead got the answer in post#3.

 

[HandySparks]

Lol funny guys on here ok tell me whats going on then?

Yes i done an ir test between l/n,l/e and n/e all of which cam back greater than 299mohm.

I am getting 248v between l/n and l/e.

Do you have continuity figures for the circuit? R1, Rn or R1+Rn?

 

[happysteve]

High resistance joint on the L (or N). Simple application of Ohm's Law. If you're not pulling any current (I imagine your megger has a high input impedance) then the voltage drop over even a largish resistance will be low, and you will measure a high voltage. Whereas anything pulling a reasonable amount of current (with a low resistance), the majority of the voltage will drop across your high resistance joint.

Hence Handyspark's question, I guess...

 

[ThrownRazor25]

Thanks happysteve i looked for a joint but couldnt see any.

It might be under the floor or in the wall tho so ill prob end up rewiring it.

 

[SparkyChick]

Thanks happysteve i looked for a joint but couldnt see any.

It might be under the floor or in the wall tho so ill prob end up rewiring it.

Or it might be in the service head, meter, isolator if fitted, a loose henley block connection.

I would put the system under some load and check the voltages all the way through the system. That will help point you in the right direction.

 

[Bobster]

Just measure the voltage at the socket with the kettle plugged in...