Strange things at callout

[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...

 

[willy fixit]

End to ends? L/N/Cpc
Edit: Sorry didn't spot HandySparks post #16

 

[Octopus]

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

Excellent strategy .......... can't locate the fault so lets do a circuit rewire ................................ what happens if this doesn't fix it?

 

[davesparks]

Have you tested the appliances?

 

[buzzlightyear]

Excellent strategy .......... can't locate the fault so lets do a circuit rewire ................................ what happens if this doesn't fix it?

has well begin a spark you have to think like a detective
Holmes !

 

[buzzlightyear]

Have you tested the appliances?

may be the appliances have not any fuses in !

Are you for real?

yep , done that?

 

[Brian Angell]

load it up, start measuring from CU to appliance. hopefully youll find it.