2396 Design exam help on processes

[chrisjw3330]

Hi
I am resitting my 2396 tomorrow and going through my past papers I have a question that I stumbled on last time out. The training provider I failed with are no longer in business, they weren't very good, so I am on my own.

The questions are ;

A 230v single phase circuit is wired using a multicore 70c thermoplastic cable having 1.5mm2 conductors and 49m in length.
It is protected by a 16a BS88c,PScc reading at the origin of the circuit is 110a.

Q. Determine if this circuit has adequate short circuit protection?

And -

Q. How do you determine if a circuit breaker will protect the live conductors in line with 434.5.2?

Not necessarily looking for answers but a breakdown of the process would be greatly appreciated.

Thanks

Chris

 

[Spottydogs]

Thanks for that Strima. How did you go about showing the wiring routes on the drawing, did you simply have line after line in a different colour showing the intended routes down to switches and then back to the luminaries? Or did you split lighting and power? I’m think I’m mainly a little unsure just how much details they’re looking for and I don’t want to spend time going ott or perhaps worse, having to go back over it again because I’ve not covered enough!

 

[Strima]

Thanks for that Strima. How did you go about showing the wiring routes on the drawing, did you simply have line after line in a different colour showing the intended routes down to switches and then back to the luminaries? Or did you split lighting and power? I’m think I’m mainly a little unsure just how much details they’re looking for and I don’t want to spend time going ott or perhaps worse, having to go back over it again because I’ve not covered enough!

Depends on what they are asking for. If they are only asking for wiring routes don't worry about cable drops etc. I went down my local stationary shop and got some of the drawings printed out on A3 and A2. I had quite a few A3 sheets used for rough drawings and routes.

I roughly sketched out my wiring routes then went with my circuit designs, so I could get away with buried in plaster others needed to be on perf tray for CCC etc. Once I was happy with the circuits I then went back to the wiring routes.

Don't show individual circuits on the sheets unless they have asked for it, just the wiring routes. Otherwise the whole thing will look like a plumbers scribble...

All I did was draw on the drawing where my tray/buried/clipped runs were using different colour pens, don't use crayons as plumbers like to eat them. I kept most of my installation run on tray wherever possible with drops buried in plaster. You do not have to specifically state, unless they really ask, what size tray you will be using. Just give them the generic 300, 200, 100, 50mm sizes.

Put in little comments on a cover sheet such as:

• Installers are to place tray in such a position as to allow access to cable drops whilst supporting the cable.
• Containment is to be tested for continuity and earthed as per manufacturers instructions.
• Cable drops buried in plaster are to have suitable mechanical protection.
• And any other -------s that sounds good etc etc etc

Also for the lighting I split the installation down into zones and just colour coded them on separate sheets.

I would stick a copy of mine up but I did these by hand and never made a copy of them.

 

[Zdb]

Managed to upload this. Someone may find it useful in the future.

 

[Leomax]

Hi
I am resitting my 2396 tomorrow and going through my past papers I have a question that I stumbled on last time out. The training provider I failed with are no longer in business, they weren't very good, so I am on my own.

The questions are ;

A 230v single phase circuit is wired using a multicore 70c thermoplastic cable having 1.5mm2 conductors and 49m in length.
It is protected by a 16a BS88c,PScc reading at the origin of the circuit is 110a.

Q. Determine if this circuit has adequate short circuit protection?

And -

Q. How do you determine if a circuit breaker will protect the live conductors in line with 434.5.2?

Not necessarily looking for answers but a breakdown of the process would be greatly appreciated.

Thanks

Chris

Do you have past exam papers

 

[Leomax]

Hi
I am resitting my 2396 tomorrow and going through my past papers I have a question that I stumbled on last time out. The training provider I failed with are no longer in business, they weren't very good, so I am on my own.

The questions are ;

A 230v single phase circuit is wired using a multicore 70c thermoplastic cable having 1.5mm2 conductors and 49m in length.
It is protected by a 16a BS88c,PScc reading at the origin of the circuit is 110a.

Q. Determine if this circuit has adequate short circuit protection?

And -

Q. How do you determine if a circuit breaker will protect the live conductors in line with 434.5.2?

Not necessarily looking for answers but a breakdown of the process would be greatly appreciated.

Thanks

Chris

Chris do you have past exam papers.

Leo

 

[westward10]

Chris do you have past exam papers.

Leo

Email address removed. The original poster has not been seen for nearly three years so you are not likely to get a response.