June 2011 2391 exam

[Richard]

Did any of you sit it? I didn't think it was TOO bad, couple of questions I was a little unsure of but overall ok. How did you guys find it? I can never think of the bloddy questions afterwards!

 

[Spoon242]

A BS EN 60898 circuit breaker has an Icn of 10kA and an Ics rating of 6kA. State.
a) how the circuit breaker is likely to perform if the circuit developed a fault current of 8kA?
b) the likely operational condition of the circuit breaker following the fault?
c) the action that would need to be taken to ensure the circuit was protected should a similar fault occur in the future?

unsure on this one. Simple answers on a post card to help the penny drop pls.

 

[malcolmsanford]

(a) Icn is the maximum fault current a protection device can interupt safely so 8Ka on a 10Ka breaker will interupt safely without destruction.
(b) The breaker may no longer be fit for purpose and the protection should be changed.
(c) I assume the last question is asking to fit a protection device with an higher Icn

I think section 7 of the OSG carries this information, but I don't have a copy at hand to make sure. So I may have things about face, but I'm pretty sure that is it. I always get Icn and Ics mixed up lol

 

[IQ Electrical]

a) The device would interrupt the fault safely.b) The device would not be fit for continued service.c) A new device should be installed with an Icn rating of at least equal to the PFC where it is required to operate.Think of the n in Icn as 'knackered' -the device can interrupt the fault but then needs to be replaced.The s in Ics is 'service' and means that faults can be safely interrupted up to the Ics value without damaging the device.

 

[Spoon242]

Yeah, thanks, its a good starting point for me to research it. Page 56 section 7 OSG

 

[malcolmsanford]

a) The device would interrupt the fault safely.b) The device would not be fit for continued service.c) A new device should be installed with an Icn rating of at least equal to the PFC where it is required to operate.Think of the n in Icn as 'knackered' -the device can interrupt the fault but then needs to be replaced.The s in Ics is 'service' and means that faults can be safely interrupted up to the Ics value without damaging the device.

Cheers IQ I will remember that as I always have to stop and think which one is which and mostly get it wrong ........it's not true you know mate what they say about you behind you back on here........mg_smile:

 

[IQ Electrical]

Cheers IQ I will remember that as I always have to stop and think which one is which and mostly get it wrong ........it's not true you know mate what they say about you behind you back on here........mg_smile:

It's all true!I apologise for the lack of paragraphs on my posts, everything sent through my iPhone ends up as one continuous rambling!

 

[armbands0]

Hi I took the June 2391, could not remember any questions, came out of exam with a complete blank.

Felt confident of passing when I packed away to leave room though.

I took red, brown, blue, yellow and green pens I was expecting an earth fault path diagram did not need them, gutted.

33 days to go?

 

[Spoon242]

List [FONT=Arial,Arial][FONT=Arial,Arial]four [/FONT][/FONT]actions to be taken by the inspector to ensure the safety of the community
centre staff during the inspection and testing process

Where can I find this in the GN 3 please, I could have a stab at them, but I know how fussy they can be with the right wording.

 

[IQ Electrical]

List [FONT=Arial,Arial][FONT=Arial,Arial]four [/FONT][/FONT]actions to be taken by the inspector to ensure the safety of the community
centre staff during the inspection and testing process

Where can I find this in the GN 3 please, I could have a stab at them, but I know how fussy they can be with the right wording.

1 The use of Barriers

2 Consider wander leads as a trip hazard

3 Never isolate lighting without permission and adequate warning

4 Ensure the entire installation is isolated from all sources of supply before disconnecting the earth conductor or any main protective bonding conductors.

There are many more but these will probably do you.

 

[Spoon242]

2 Consider wander leads as a trip hazard

I really had not given good thought to trip hazards. It is exactly what I would do if I ran an extension lead when I plug my laptop into a machine at work, haha.
It's general hazards, common sense and isolation. Once again IQ, thank you.

Exam creeping closer, sitting on 21st July 2011.

 

[IQ Electrical]

I really had not given good thought to trip hazards. It is exactly what I would do if I ran an extension lead when I plug my laptop into a machine at work, haha.
It's general hazards, common sense and isolation. Once again IQ, thank you.

Exam creeping closer, sitting on 21st July 2011.

Stay cool and you'll be fine!

 

[kennydeeee]

How much longer till the results for June exam

 

[IQ Electrical]

How much longer till the results for June exam

If you go to the C&G UK website, find the results calculator, enter the exact date that you sat the exam and the 'latest results date' will be given, often results are available a few days before.

 

[silver surfer]

I really had not given good thought to trip hazards. It is exactly what I would do if I ran an extension lead when I plug my laptop into a machine at work, haha.
It's general hazards, common sense and isolation. Once again IQ, thank you.

Exam creeping closer, sitting on 21st July 2011.

Is your course the same week? I am starting the course on the 18th and have the exam on the 21st. So, to answer my own stupid question, there must be an exam once a month, that would put me at a disadvantage in terms of revision time wouldnt it?

 

[IQ Electrical]

Is your course the same week? I am starting the course on the 18th and have the exam on the 21st. So, to answer my own stupid question, there must be an exam once a month, that would put me at a disadvantage in terms of revision time wouldnt it?

There's normally only 6 examination dates per year, there is no September or November exam this year.