Hi, currently on a four day course sitting the 2391. what i,m extremely surprised at we seem to be only covering basic inspection & testing, the course is absolutely no different from what i did on my 2330 except my 2330 was a little more in depth. this seems rather strange to me, as the 21 is one of the most failed electrical exams and seems to be very respected throughout the electrical world , i thought the course would be all calculations could anyone throw some light on this for me cheers.
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- Thread starter soulman
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Soulman,
Are you doing 2391 or 2392?
Where are you doing the course, I am teaching on a 2391 local to me on Thursday!
I&T is I&T, the slant on 2391 is Periodic Though really, not so much initial verification though this is obviously covered.
Are you doing 2391 or 2392?
Where are you doing the course, I am teaching on a 2391 local to me on Thursday!
I&T is I&T, the slant on 2391 is Periodic Though really, not so much initial verification though this is obviously covered.
hi sidewinder i'm doing the course at a private provider in washington tyne & wear its definately c&g 2391 i,ve been there two days i've only covered basic testing initial verification we have covered the basics of filling an eic schedule of inspections & test results. i can do this in my sleep and haven't learnt anything at all so if this examination is as hard as people say i will surely fail. i covered all basic i&t and basic periodic inspection in 2330. we are going to cover periodics wednesday morning then move onto exam papers wed afternoon & all day thursday no adiabatic equations or cable calcs volt drop. so i'm a little confused as i thought this was supposed to be intense.
Check mate, that sounds like the 2392.
AndyGuinness
AndyGuinness
You won't do adiabatic or cable calcs as it's not a design course.
You should have covered all this stuff by the time you sit the course.
The design course is the 2391-20, you are doing the 2391-10.
The issue with the exam is incorrect use of terms, e.g. "Megger" rather than "insulation resistance tester".
You need to be sure of the sequence of tests, the values you should expect for say insulation resistance, the voltages to test at etc.
You need to be able to draw from memory the earth fault loop impedance paths for the various types of system.
Go on the C&G website, get a copy of the last examiners report, and a few before, see what they pick people up on, this will give you the heads up on what is often misunderstood.
If you have to describe the full sequence of tests for IV of a ring final circuit, remember all of them, also the results you get end to end are NOT R1 & R2, they are r1, r2 & rn.
Mega is a capital M, volts is a capital V, milli is a small M, "little" things like this will trip you up.
When you are doing past exam type questions GN3 & the BRB is your friend.
YOu will not have access to past papers as centres are not allowed to give them to students, the questions will be identical or almost identical to typical exam questions but will never be the actual ones!
Typical examiners report here from Aug 11.
http://www.cityandguilds.com/documents/Chief_examiners_report_August_2011.pdf
If you look at section 2 "Feedback on candidate performance" the second section is why I get in so much trouble on here for chastising other posters for incorrect use of terms!!!
HTH.
Be nice to know how you get on, this will be my 2nd 2391 teaching session now, probably I'll be taking typical exam questions & answering students questions that they have on the course to date and clarifying any points etc.
Once I know how my students got on I'll post up IF I remember!
You should have covered all this stuff by the time you sit the course.
The design course is the 2391-20, you are doing the 2391-10.
The issue with the exam is incorrect use of terms, e.g. "Megger" rather than "insulation resistance tester".
You need to be sure of the sequence of tests, the values you should expect for say insulation resistance, the voltages to test at etc.
You need to be able to draw from memory the earth fault loop impedance paths for the various types of system.
Go on the C&G website, get a copy of the last examiners report, and a few before, see what they pick people up on, this will give you the heads up on what is often misunderstood.
If you have to describe the full sequence of tests for IV of a ring final circuit, remember all of them, also the results you get end to end are NOT R1 & R2, they are r1, r2 & rn.
Mega is a capital M, volts is a capital V, milli is a small M, "little" things like this will trip you up.
When you are doing past exam type questions GN3 & the BRB is your friend.
YOu will not have access to past papers as centres are not allowed to give them to students, the questions will be identical or almost identical to typical exam questions but will never be the actual ones!
Typical examiners report here from Aug 11.
http://www.cityandguilds.com/documents/Chief_examiners_report_August_2011.pdf
If you look at section 2 "Feedback on candidate performance" the second section is why I get in so much trouble on here for chastising other posters for incorrect use of terms!!!
HTH.
Be nice to know how you get on, this will be my 2nd 2391 teaching session now, probably I'll be taking typical exam questions & answering students questions that they have on the course to date and clarifying any points etc.
Once I know how my students got on I'll post up IF I remember!
thank you sidewinder. i am absolutely fine with correct terminology, i was a little cheeky today & corrected lecturer as for end to end he had wrote R1 Rn etc instead of r1, rn, he also failed to join leads together before i.r testing. I am very interested in T&I read many books & done well at college, i was thinking something wasn't quite right as it was very basic. most of what you have put up there he has gone through including the terminolgy bit. yes are right the past exam questions are out of the exam revision books.
cheers
p.s i do know 4 people who took 2392 after there 2330 and all 4 of them were wanting there money back as they didnt learn anything!
cheers
p.s i do know 4 people who took 2392 after there 2330 and all 4 of them were wanting there money back as they didnt learn anything!
The joining leads bit before IR testing depends on the tester.
My Fluke 1653B clears the screen at every IR test, thus you don't need to clear the screen to ensure that you get a valid reading.
Also the resistance of the leads is negligible in relation to the resistances you are trying to measure, which is obviously not so with respect to r1 & R2 etc. type readings, i.e. those made with a low resistance ohm meter.
---------- Post Auto-Merged at 19:22 ---------- Previous post was made at 19:21 ----------
Going on what Canoey has just posted, there is another thing, know your Statute and non statute references.
My Fluke 1653B clears the screen at every IR test, thus you don't need to clear the screen to ensure that you get a valid reading.
Also the resistance of the leads is negligible in relation to the resistances you are trying to measure, which is obviously not so with respect to r1 & R2 etc. type readings, i.e. those made with a low resistance ohm meter.
---------- Post Auto-Merged at 19:22 ---------- Previous post was made at 19:21 ----------
Going on what Canoey has just posted, there is another thing, know your Statute and non statute references.
cheers sidewinder, no lecturer stated later that he forgot when demonstrating ir test that he should have shorted leads to check they were correctly connected and if we did it we would be marked down
cheers you've put my mind at rest a little i just expected more considering the high failure rate.
cheers you've put my mind at rest a little i just expected more considering the high failure rate.
Fair point, but again some meters check for presence of leads, and may or may not have fuses in their leads.
I took it that you were referring to "nulling" rather than correct connection.
I took it that you were referring to "nulling" rather than correct connection.
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