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W
WDMDL
Most colleges don't teach you how to test for the 2391. You're expected to know it already, at least through assisting.
The practical - if you've been doing things right, it's easy.
The theory - A bunch of 60 short answer questions, then six big questions each worth 15 marks, all based around the one scenario.
Don't worry, the big questions are just a bunch of the smaller ones tied together relating to the scenario.
Because they're all related, one that you can't answer earlier on may suddenly ring a bell and you can go back to it.
Safe isolation, interpretation of the results obtained from site tests.... are those Zs, (R1+R2), IR figures acceptable?
Application of the 80% rule of thumb.
They'll ask what you would be looking for on a periodic inspection of a particular circuit. In the December one it was car park lighting...so all the way from the board to the last lamp. Compare breaker Icn with PFC, circuit Zs. SWA cable term'd correctly. Was 3c so identification of Neutral and Earth by sleeving etc
Outdoor lighting minimum IP33
Application of common formulae.
Selection of correct instrument and range. (The exam doesn't acknowledge the existence of MFTs)
Explain how you test a ring circuit. Step by step with bullet points.
Earth fault loop paths - They'll likely ask you one of TN-S, TN-C-S or TT. Learn them all! Draw the diagram with the fault path indicated and list the sequence and relevant circuit components.
IP rating of top of consumer unit
Some special location questions - eg bathrooms, construction sites and caravans / caravan sites. They're the most common ones.
Statutory and non statutory documents.
H&S, EAWR, GS38.
Look up the past papers on here.... a lot of the ones floating round the net are for 16th edition and in some cases you can substitute phrases, but other times there has been a complete change so you can't answer the question.
You have to know it... there's no reference material allowed.
It's a fully written exam, no multiple choice so make sure your handwriting is legible.
CORRECT TERMINOLOGY IS ESSENTIAL. I know I lost marks on mine because I put R1, R2 and RN instead of r1, r2 and rn for my ring circuit end-to-end tests.
In particular the names of the "earth wires", eg Earthing Conductor, Main protective bonding conductor, Circuit Protective Conductor.
Arm yourself with 2 black and one of each brown, blue, green and red pens, a scientific calculator (must not be programmable type).
Mobiles must be switched off and handed in (or placed in locker if provided)
Take some photo ID.
Remember to clearly indicate which question number you are answering.
Simon.
The practical - if you've been doing things right, it's easy.
The theory - A bunch of 60 short answer questions, then six big questions each worth 15 marks, all based around the one scenario.
Don't worry, the big questions are just a bunch of the smaller ones tied together relating to the scenario.
Because they're all related, one that you can't answer earlier on may suddenly ring a bell and you can go back to it.
Safe isolation, interpretation of the results obtained from site tests.... are those Zs, (R1+R2), IR figures acceptable?
Application of the 80% rule of thumb.
They'll ask what you would be looking for on a periodic inspection of a particular circuit. In the December one it was car park lighting...so all the way from the board to the last lamp. Compare breaker Icn with PFC, circuit Zs. SWA cable term'd correctly. Was 3c so identification of Neutral and Earth by sleeving etc
Outdoor lighting minimum IP33
Application of common formulae.
Selection of correct instrument and range. (The exam doesn't acknowledge the existence of MFTs)
Explain how you test a ring circuit. Step by step with bullet points.
Earth fault loop paths - They'll likely ask you one of TN-S, TN-C-S or TT. Learn them all! Draw the diagram with the fault path indicated and list the sequence and relevant circuit components.
IP rating of top of consumer unit
Some special location questions - eg bathrooms, construction sites and caravans / caravan sites. They're the most common ones.
Statutory and non statutory documents.
H&S, EAWR, GS38.
Look up the past papers on here.... a lot of the ones floating round the net are for 16th edition and in some cases you can substitute phrases, but other times there has been a complete change so you can't answer the question.
You have to know it... there's no reference material allowed.
It's a fully written exam, no multiple choice so make sure your handwriting is legible.
CORRECT TERMINOLOGY IS ESSENTIAL. I know I lost marks on mine because I put R1, R2 and RN instead of r1, r2 and rn for my ring circuit end-to-end tests.
In particular the names of the "earth wires", eg Earthing Conductor, Main protective bonding conductor, Circuit Protective Conductor.
Arm yourself with 2 black and one of each brown, blue, green and red pens, a scientific calculator (must not be programmable type).
Mobiles must be switched off and handed in (or placed in locker if provided)
Take some photo ID.
Remember to clearly indicate which question number you are answering.
Simon.
Last edited by a moderator:
Great post Si you should be writing the course blog
W
WDMDL
Still waiting for my results....
There were another few things I know I lost marks on, but when you don't know the pass mark or get a grade it's a case of having to wait for the chief examiner's report to be published.
Those are helpful as it highlights the areas where people don't understand things as well as they should.
Fingers crossed!
Simon.
There were another few things I know I lost marks on, but when you don't know the pass mark or get a grade it's a case of having to wait for the chief examiner's report to be published.
Those are helpful as it highlights the areas where people don't understand things as well as they should.
Fingers crossed!
Simon.
Totally agree with Simon good reply.
I found the hardest thing was putting the information down on paper.You know the answer but getting it on paper in the correct terminology is a different storey I would always leave out an essential bit.
The college I went too made you write out your answers to get into the habit useing bullet points and getting used to it especially documenting safety aspects. (Disconnect the supply and reconnect the earth conductor before re connecting supply when say doing a ze test).
Try and get on one of the courses as you will be amazed at how much you have forgot plus I picked up lots of things from the guys on the course.
You need to revise and revise and keep doing it and get to know GN 3 inside out if you can.
The testing practical is straight forward as long as you follow GN 3 and our centre let us use are own test meter etc.
Arrive early for the exam the December one was a bit of an odd one with all the bad weather I arived late only to find the guy assessing the exam was even later and some exams were re arranged.
If stuck the forum is a good place to look for a answer
Best of luck
I found the hardest thing was putting the information down on paper.You know the answer but getting it on paper in the correct terminology is a different storey I would always leave out an essential bit.
The college I went too made you write out your answers to get into the habit useing bullet points and getting used to it especially documenting safety aspects. (Disconnect the supply and reconnect the earth conductor before re connecting supply when say doing a ze test).
Try and get on one of the courses as you will be amazed at how much you have forgot plus I picked up lots of things from the guys on the course.
You need to revise and revise and keep doing it and get to know GN 3 inside out if you can.
The testing practical is straight forward as long as you follow GN 3 and our centre let us use are own test meter etc.
Arrive early for the exam the December one was a bit of an odd one with all the bad weather I arived late only to find the guy assessing the exam was even later and some exams were re arranged.
If stuck the forum is a good place to look for a answer
Best of luck
Do you think you could try a little bit harder with your response next time, a little more content maybe??
Sheesh
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