** Loki's Trainee Comp **

[GMES]

I know haha

 

[Paul.M]

Lucky 7 it is then

So who's the winner?


Loki

I'm not telling you!!!!

He is logged on right now?

GMES, please announce the winner. You've been a massive part of this comp from the start, only right that you should do it

 

[GMES]

The winner is *********** PENNYCHEW************

 

[Paul.M]

This is the list:-

4..ASM
2..Simonslimline
7..Pennychew
1..Leo-Chaos
6..Jimmyray
5..Northstar
8..Resu
3..Omega


Well done Pennychew

 

[GMES]

Congratulations mate even though you said it was a fix

 

[Loki]

The winner is *********** PENNYCHEW************

Congratulations Pennychew


Loki

 

[pennychew]

Hahaha!

fix!!!

 

[pennychew]

Congratulations Pennychew


Loki

Thank you very much Loki, I'll put it to good use... I also have a prize I'm going to put up for a comp so make sure you enter

 

[newtothis]

Congrats pennychew - would you care to share your prize winning answer ?

 

[GMES]

Thank you very much Loki, I'll put it to good use... I also have a prize I'm going to put up for a comp so make sure you enter

So we have another Trainee with a prize to donate, this keeps getting better Very generous of you mate thank you!!

 

[pennychew]

Congrats pennychew - would you care to share your prize winning answer ?

Ive just checked my sent PM's for the answer but ive deleted it, Doh!

looks like im going to have to work it out again while slightly tipsy!

 

[Simonslimline]

2.5 / 1.5 = 1.67.

So the answer is R1 x 1.67 gives the value for R2.

 

[Paul.M]

Congrats pennychew - would you care to share your prize winning answer ?

This is now my headache? There is more than one correct answer that is acceptable! Pennychew's answer was 0.98 Ohms btw.

Depending on which formula you use and the amount of decimal places you use, there are 4 different correct answers lol. I need to think about that next time!

 

[Paul.M]

Ive just checked my sent PM's for the answer but ive deleted it, Doh!

looks like im going to have to work it out again while slightly tipsy!

Out of the 1468 saved PM's, yours is one of them! You used the same formula as Simon above btw.

 

[pennychew]

Right.... when the cpc (R2) is 1.5mm2 and the live conductor (R1) is 2.5mm2 then the CSA of R1 is 1.666667 times the CSA of the smaller cpc...

So the resistance in the smaller cable (cpc) should be 1.6666667 times higher than in the live conductor so 0.59 x 1.666667 = 0.98ohms

 

[pennychew]

2.5 / 1.5 = 1.67.

So the answer is R1 x 1.67 gives the value for R2.

Thats what i was trying to get at! took me 4 minutes longer though!

 

[newtothis]

2.5 / 1.5 = 1.67.
So the answer is R1 x 1.67 gives the value for R2.

Thanks for that.
Gawds honest truth, I thought it was a trick question, so didn't enter :dunce2:

 

[pennychew]

Thanks for that.
Gawds honest truth, I thought it was a trick question, so didn't enter :dunce2:

You probably havent covered these formulas at college yet though mate, keep reading on here and asking questions and it will soon stick

 

[Paul.M]

Thanks for that.
Gawds honest truth, I thought it was a trick question, so didn't enter :dunce2:

No trick questions in here, just the odd question that will stick with you all throughout your life.

eg, 6mm line conductor with a 2.5mm cpc or a 10mm line conductor with a 4mm cpc, what is the ratio?

 

[pennychew]

No trick questions in here, just the odd question that will stick with you all throughout your life.

eg, 6mm line conductor with a 2.5mm cpc or a 10mm line conductor with a 4mm cpc, what is the ratio?

?

 

[Loki]

Thank you very much Loki, I'll put it to good use... I also have a prize I'm going to put up for a comp so make sure you enter

PM sent.

looking forward to your competition, just remember all the numbers = loki FIX lol


Loki

 

[newtothis]

Thanks folks I'm familiar with the formula, this is what I wasn't sure of

The socket circuit end to end test result

I associate end to end tests with Ring FCs :38:
I don't want to crash this, post with silly questions LOL

 

[pennychew]

PM sent.

looking forward to your competition, just remember all the numbers = loki FIX lol


Loki

Haha, every comp i ever enter i always claim its a fix before the winner is even announced! I need to think of a decent question first off though.... hmmm

 

[pennychew]

Thanks folks I'm familiar with the formula, this is what I wasn't sure of

I associate end to end tests with Ring FCs :38:
I don't want to crash this, post with silly questions LOL

Dont be daft mate, nowt silly about it.... we are all here to learn

 

[Paul.M]

PM Loki your address so he can post out the book.

 

[pennychew]

Thanks folks I'm familiar with the formula, this is what I wasn't sure of

I associate end to end tests with Ring FCs :38:
I don't want to crash this, post with silly questions LOL

**deleted**
Edited this post to stop myself looking a right tool cos I didn't read the fact it said radial in the original question, probably a good time to go bed now! [emoji1]

 

[Paul.M]

Thanks folks I'm familiar with the formula, this is what I wasn't sure of

I associate end to end tests with Ring FCs :38:
I don't want to crash this, post with silly questions LOL

No such thing as silly question in the TS.

an end to test can be done on either a radial circuit or RFC. I tried to save confusion by putting the word "radial" in the question twice.

Scenario, we have just installed new radial circuit in a house using 6242y flat T&E. A Radial Socket Circuit using 2.5mm with 1.5mm CPC/earth

The socket circuit end to end test result, R1 = 0.59

If this were a Ring Final Circuit, we would test end to end at the CU/DB and get a r1. If that result was 0.59 you would expect a reading of 0.98 for the r2. The r1+r2 would be:- 0.59 + 0.98 divided by 4 = 0.39

If the Ze reading was 0.17, you add these together to see what the expected Zs will be. r1+r2+Ze = 0.39+0.17= 0.56

Now that we know what it should be, we can test at each socket outlet and if the Zs readings are higher than 0.56, there must be something wrong! Terminations should be checked.

 

[pennychew]

My book has just arrived with this mornings post, im blown away at what it contains to be honest, it will be a massive help when i go on to the inspection and testing in my Level 3 next year.

Thanks again Loki for a great gesture :icon4:

 

[newtothis]

If this were a Ring Final Circuit, we would test end to end at the CU/DB and get a r1.

Thanks for the explanation Paul M - I have a fair handle the sums, used to calculate the theoretical yardsticks.
It's just how to physically measure the R1 on the radial that has me scratching my head. :book:

 

[pennychew]

Thanks for the explanation Paul M - I have a fair handle the sums, used to calculate the theoretical yardsticks.
It's just how to physically measure the R1 on the radial that has me scratching my head. :book:

The only accurate way i can think of would be with a wander lead?

 

[newtothis]

The only accurate way i can think of would be with a wander lead?

Thnks pennychew :thinking: That's what I was thinking, then I thought the cable wouldn't be the same CSA and would require more sums ??

 

[pennychew]

You connect the wander lead up to your tester then null it so that wander lead is taken out of the equation... The other way would be to record the resistance of the wander lead first then subtract this from the overall measured resistance of the wander lead and the live conductor

 

[newtothis]

Thanks for your perseverance mate, it's appreciated, that's clear, I understand. :yes:

 

[pennychew]

Not a problem at all mate!