An insulation resistance test

[akmal]

Hi,

Can some one please help me with this question:

Q: An insulation resistance test on one of the radial socket-outlet indicated zero mega ohm between line and neutral. Explain why the result of the previous R1 + R2 test could not be used to confirm polarity for this circuit.

If any one can answer this question, it will be very appreciated.

Thanks

 

[Plonker 3]

Is this a homework question? We will gladly help you, but firstvshow what you think is the answer, then we will help and point you in the right direction.

If you are a trainee there is a section on here just for trainees, which you may want to join.

 

[shanky887614]

Hi,

Can some one please help me with this question:

Q: An insulation resistance test on one of the radial socket-outlet indicated zero mega ohm between line and neutral. Explain why the result of the previous R1 + R2 test could not be used to confirm polarity for this circuit.

If any one can answer this question, it will be very appreciated.

Thanks

it might be worth signing upto the trainee section.

we dont do peoples homework for them.

what do you think?

what is an ir test? what is the difference between 0.00 and 999M ohms on ir test?

what would it mean if you got 0.00 on the test


R1 = L
R2 = cpc
Rn= N

 

[Pete999]

Hi,

Can some one please help me with this question:

Q: An insulation resistance test on one of the radial socket-outlet indicated zero mega ohm between line and neutral. Explain why the result of the previous R1 + R2 test could not be used to confirm polarity for this circuit.

If any one can answer this question, it will be very appreciated.

Thanks

Come on now put your thinking cap on, R1=res of line conductor
R2= res of cpc
RN =res of neutral
got it so far? and you have a line to neutral short 0Mohms, yes? so what do you the R1+R2 test will actually measure? rocket science it is not. Hope thats the right way to describe it, I have just got in from doing the shopping, I'm stressed.

 

[tomspark93]

I got this question when I sat my 2394 in October 14 I think it was worth 4 marks.

 

[PEG]

Hi dude, So you have a "link" ,of unknown impedance,between R1 and Rn...and a continuity reading (presumably in Ohms) between R1 and R2.

If you draw it out,it may become clearer. :icon12:

 

[trev]

If the question really uses the phrase "mega ohm" I'll show my arse in a shop window

 

[Pete999]

If the question really uses the phrase "mega ohm" I'll show my arse in a shop window

Got a feeling Trev it should be Megohms all one word, not as some call it megger ohms mega ohms. but love to see your bare arse in a Tescos extra lol:laugh::speechless::speechless:

 

[telectrix]

trev's arse in a tesco store window? would that be crack and collect?

 

[ruston]

trev's arse in a tesco store window? would that be crack and collect?

It's Fenwick's window that wins all the bets in Newcastle lol.

 

[trev]

Got a feeling Trev it should be Megohms all one word, not as some call it megger ohms mega ohms. but love to see your bare arse in a Tescos extra lol:laugh::speechless::speechless:

Mega ohms / Megger ohms. One of the many things that grates on me Pete

 

[VoltzElectrical]

I'm not going to post the answer, but I will admit it took several readings of the original question and the subsequent posts to work out the answer! Somebody call me stupid! :2guns:

 

[davesparks]

Well that's a pretty badly worded question isn't it! It's obvious what the intention of the question is, but the wording leaves a lot to be desired.

 

[ruston]

Not with that uniform on I won't.:smile5:

 

[ruston]

Well that's a pretty badly worded question isn't it! It's obvious what the intention of the question is, but the wording leaves a lot to be desired.

It is like the way some of the C&G questions are set .

 

[Pete999]

Mega ohms / Megger ohms. One of the many things that grates on me Pete

Flew to just goes to show how some folk misunderstand the results

 

[telectrix]

so what about gigger ohms then?

 

[davesparks]

Giggitty giggitty

 

[trev]

so what about gigger ohms then?

Gigohm(s)

 

[ruston]

Gigohm(s)

Is that when you've finished one Trev and are on your way.....

 

[Pete999]

so what about gigger ohms then?

Never heard that one Tel, "gigger ohms" killer ohms maybe??