I feel like a such a muppet!

[Gary Tollison]

Hello
I'm just reading through a few examples of fault report sheets in preparation for my next practical week.

Fault: Office water heater does not work.
R1 + R2: 0.35 ohms
Rn + R2: >99.9 ohms

I'm fine with getting R1 + R2. Disconnect the line conductor and shove it into the earth bar, but Rn + R2? I'm confuzzled! I've been racking my brain and leafing through my notes and I just cant remember how!

Can anyone help with this conundrum?
Thanks,
Gary

 

[Leesparkykent]

Hello
I'm just reading through a few examples of fault report sheets in preparation for my next practical week.

Fault: Office water heater does not work.
R1 + R2: 0.35 ohms
Rn + R2: >99.9 ohms

I'm fine with getting R1 + R2. Disconnect the line conductor and shove it into the earth bar, but Rn + R2? I'm confuzzled! I've been racking my brain and leafing through my notes and I just cant remember how!

Can anyone help with this conundrum?
Thanks,
Gary

Connect line and neutral together in a leaver wago/con block, get your low ohms resistance meter, null the leads and measure the resistance.

 

[Gary Tollison]

Yes, that is R1+r2
I'm asking about Rn+r2

 

[Gary Tollison]

ignore my last reply...
#Senior moment!

 

[Leesparkykent]

Yes, that is R1+r2
I'm asking about Rn+r2

No that was R1+Rn...Do the same as the above but with neutral and CPC.

 

[GMES]

Yes, that is R1+r2
I'm asking about Rn+r2

You sure about that Gary

 

[mattg4321]

Read it again. Lee is correct!

 

[GMES]

Seen your reply Gary, scrap my comment.

 

[Gary Tollison]

lol thanks!
As the topic says...
I feel like such a muppet!

 

[Deleted member 26818]

Rn + R2 is neutral and earth.
If you can stick the line conductor in the earth bar to get R1 + R2, you can do the same with the neutral conductor to get RN + R2.

 

[oracle]

Why didn't they call line R1, neutral R2 and CPC R3? Easy as 123. Some people can count better than read, apparently.

 

[littlespark]

Which muppet are you feeling? and did you get their consent beforehand?

 

[123]

Why didn't they call line R1, neutral R2 and CPC R3? Easy as 123. Some people can count better than read, apparently.

What has it got to do with me?

 

[TJ Anderson]

Fault: Office water heater does not work.
R1 + R2: 0.35 ohms
Rn + R2: >99.9 ohms

Is this not asking why the water heater is not working if you had the readings above?

Gary, if you tested and got the above readings, what would your thoughts be as to why the water heater did not work?

 

[MFS Electrical]

@Gary Tollison you should get yourself into the trainee bit mate......

 

[Octopus]

Very few people use the Rn + R2 when fault finding but it’s simple and quick ...... and so helpful ...

 

[oracle]

What has it got to do with me?

Well are you easy or not?