Resistance testing radial sockets

[JakeC]

Hi, I've just been doing some practising on a smallish radial circuit with a few spurs.. just looking for some help to explain why when doing an IR test between L & N its reading 0.3Mohm but for L-E and N-E i'm getting over 500Mohm.

Ta

 

[Octopus]

My guess is that something is still plugged in or switched on.

 

[JakeC]

Edited

Am I reading GN3 right when it says connect L&N together to Earth?

 

[Octopus]

Edited

Am I reading GN3 right when it says connect L&N together to Earth?

?????????????

 

[JakeC]

Actually ignore that i've found a socket at the back of a cupboard

 

[Octopus]

Actually ignore that i've found a socket at the back of a cupboard

One of the perils of the job is the "hidden" socket, FCU, accessory, or JB!!

Was something plugged in?

 

[JakeC]

Yup the washing machine. :83:

 

[Octopus]

How was the IR test with the washing machine unplugged?

 

[Silly Sausage]

Yup the washing machine. :83:

Does it still work after shoving 500 volts through it?

 

[Goody]

Yup the washing machine. :83:

Oops! Guess, you did not blow up the washig machine by testing at 500 Volts.

 

[spark 68]

Copestake

Am I reading GN3 right when it says connect L&N together, testing to Earth?

This is an acceptable way of IR testing for an existing installation.

If you are going to test between L&N, may I suggest doing a 'soft test' @ 250V first.As this will then show if something is still connected (that you may have missed) without running the risk of damaging vunerable equipment, which if you do damage you will then be liable for repair or replacement

 

[jase]

no cos he had L+N connectted together

 

[JakeC]

I didn't I just read the notes wrong :dizzy2:

Thanks for the help and tips.. and the washing machine still works :lol:

 

[Goody]

I didn't I just read the notes wrong :dizzy2:

Thanks for the help and tips.. and the washing machine still works :lol:

Happy days!

 

[djandyryan]

Ha ha ha..... nightmare!