getting 0M ohms L- N on Lighting Circuit and cooker Circuit...

[iwantmyNVQ]

---

....but RCD doesn't trip? Surely if it has a short circuit somewhere I shouldn't be able to liven the installation??

 

[telectrix]

loads connected

 

[iwantmyNVQ]

Cooker isolated, no loads on lighting circuit

 

[trev]

Neon on the cooker switch? Heads left in the smokes fed from the lights?

 

[Farmelectrics]

Trev beat me toi it neon in cooker switch maybe

 

[Octopus]

Aerial amp in the loft!

 

[oldtimer]

just because the cooker is switched off does not mean its isolated I was called out to a job because the domestic appliance guy got a belt because the live inside the switch was welded on plus why did you not disconnect the cable at the switch to prove or disprove your reading

 

[yellowvanman]

---

....but RCD doesn't trip? Surely if it has a short circuit somewhere I shouldn't be able to liven the installation??

How did you measure the 0M? If it was through an insulation test then on my tester 0 is shown for anything less than 20K. Measure it using continuity test and see how many ohms you get then!

 

[needasparks]

I think you may need to get your head round how an RCD works before testing anymore circuits fella.

 

[Octopus]

Cooker hood wired to cooker circuit?

 

[Guitarist]

you may "wantyourNVQ", but as needasparks says, think about how an RCD works.

 

[Thomas123]

---

....but RCD doesn't trip? Surely if it has a short circuit somewhere I shouldn't be able to liven the installation??

An rcd works on L and N imbalance... If there was a short circuit between them it would not affect the rcd... That would be the mcb's job.

More than likely a a load connected. Have you disconnected it from the rcd? Lol!

 

[iwantmyNVQ]

you may "wantyourNVQ", but as needasparks says, think about how an RCD works.

It detects an imbalance in a circuit between live conductors and live. Conductors and earth, hence short circuits and earth faults,
No need to be so patronizing mate for your information I created this name in 2009 looking for help and advice about doing so, with no success but have completed my assessments anyway, this is a forum for people to get help when they need it not to get scrutinized by idiots like you

 

[Guitarist]

It detects an imbalance in a circuit between live conductors and live. Conductors and earth, hence short circuits and earth faults,
No need to be so patronizing mate for your information I created this name in 2009 looking for help and advice about doing so, with no success but have completed my assessments anyway, this is a forum for people to get help when they need it not to get scrutinized by idiots like you

Well, it wasn't actually patronising, I was genuinely asking you to think about how an RCD actually works. The imbalance is actually caused when there is leakage between line and earth, or neutral and earth, not short circuits as such, and that will make a huge difference to your fault-finding
Still, call me an idiot if you like, and carry on, as you seem to already know it all.

 

[Thomas123]

It detects an imbalance in a circuit between live conductors and live. Conductors and earth, hence short circuits and earth faults,
No need to be so patronizing mate for your information I created this name in 2009 looking for help and advice about doing so, with no success but have completed my assessments anyway, this is a forum for people to get help when they need it not to get scrutinized by idiots like you

But guitarist is correct, you need to learn how an rcd works first before your let loose with a test kit, go on touch live and neutral together... It will be the overcurrent protection that will operate not the rcd..

 

[Octopus]

I created this name in 2009 looking for help and advice about doing so, with no success but have completed my assessments anyway

Don't take this the wrong way but in 3 years, you've passed your assessments yet something as simple as this has foxed you?? Time for more experience me thinks.

 

[Jimmy Boy]

I didn't even understand his question lol..That probably says more about me than the OP..
he he
J

 

[tony mc]

I hope you soft tested between the L & N as you may find the connected load is now not working due to being fried!

 

[keniff]

I hope you soft tested between the L & N as you may find the connected load is now not working due to being fried!

I did that with a garage door plugged in, I always 250v first before 500v just to be sure lol

 

[Octopus]

Makes you wonder when the test was actually done!!!!!!!!

250v first ALWAYS, even if I think its all unplugged.