live conductor

[alexout]

Hello, I am studying to pass the 17th Edition and there is a question that i do not know.

The following final circuit are to be installed using thermoplastic insulated multicore non-armoured cables 3x6A lighting 1x20A UPS supply 3x32A ring 1x40A cooker. If the cables are enclosed in a non-metalic trucking where entering the distribution board, how many live conductors would be enclosed?
A) 9
B) 16
C) 22
D) 32

Three phases=3 + mono phase=1. So 3+1+3+1=8. What am i doing wrong?

Thanks

 

[Risteard]

For a start the question asks for live conductors - not line conductors. Secondly, a ring final circuit has two of each conductor.

 

[Simonslimline]

Yes remember that the Neutral is a live conductor.

 

[HandySparks]

Hello, I am studying to pass the 17th Edition and there is a question that i do not know.

You know the question. It's the answer that you don't know. :smilewinkgrin:


Welcome to the forum.

 

[trev]

Three phases=3 + mono phase=1
Where does that bit of info come from?
There's no mention of 3ph in there, you're over thinking this. Answer what you're asked, not what you think you're being asked.

 

[Besoeker]

Answer what you're asked, not what you think you're being asked.

Excellent advice. And applicable across the board.
I've offered the same advice for those attending interviews.

 

[Robotstar5]

3X & 1X do not refer to number of phases, it's the number of circuits so 3 lighting cct's, 1 UPS cct etc.

 

[Richard Burns]

Count the live conductors

 

[GMES]

Also look in the definitions part of bgb for what is defined as a live conductor and you will find your answer!!
Seek and Yee shall find.

 

[alexout]

Thanks everyone. Now i know how to answer this kind of question.

I was worng in a lot of things...

Differencies between live conductors and line conductors
How to count in a ring
Neutral is a live conductor
3X & 1X, it's the number of circuits

Count the live conductors
View attachment 25804

wow, one picture is better than one thousand words.

Thanks:willy_nilly:

 

[telectrix]

if in doubt, you draw it out.
if too late, pushing a pram's your fate

 

[Guest111]

Thanks everyone. Now i know how to answer this kind of question.

I was wrong in a lot of things...

Differencies between live conductors and line conductors
How to count in a ring
Neutral is a live conductor
3X & 1X, it's the number of circuits




wow, one picture is better than one thousand words.

Thanks:willy_nilly:

Now you're learning,admitting when you are wrong is the first step to getting things right.

 

[telectrix]

yep, we'll get it right one day , phil. lol. :6:

 

[alexout]

Now you're learning,admitting when you are wrong is the first step to getting things right.

I know it. I am a little baby in this field but step by step I will get being a good worker.

I have more doubts, so in the future I will ask you more questions.

Thanks.

 

[Robotstar5]

So what's the answer to your 1st post?