This is what I posted last year:
It was far harder than previous 2391-20 papers had led us all (on the course) to believe.10 questions (broken into smaller bits), with 20 marks for each question total. 3 hours exam.Old 2391-20 paper asked "Give 4 ways of shock protection", 2396 paper said "Give 4 ways of shock protection in detail, with examples of their use". All of the questions (bar 1 or 2 minor 2 point queries) were in a similar vein, in asking for detailed descriptions and everyday practicalities of their use.
There was far more writing than expected, with little use of diagrams - just the one diagram iirc of a meshed bonded building to reduce electro-magnetic interference.Only 10 - 12 marks that were really easy, one was list the 7 types of wiring and installation - a direct copy from the book, but there were no other questions like that.One testing question, "say how to measure the Ze of a 3 phase supply?" - easy, until you realise 3 phase isnt listed in GN3 or OSG, so unless you have tested 3ph, you were unlikely to get full marks for that.
Calculations for CPC and Zs seemed quite straightforward at the time, but afterwards, everyone had a slightly different result, and many hadnt noted the main point that the disconnection time was too high. I even read it 3 times, it was a Type C 60898 with 4.4 secs disconnect, yet I didnt think of noting it would not meet the regs. I wasnt alone.
Overall, this was far harder than any other electrical exam I have taken. I think I have done enough for a pass, but I cannot be sure. I know I was far more confident when taking 2391-10, so this one, where you can take in your books, must be pretty difficult. As for having the books, yes, the regs gives you a help, however, it does not list why you would use some equipment, it just says you must use that equipment, so it is everyday work that gives you the experience to pass this one.
OSG was used for some cable calcs, but little else, GN3 was only used for the Ze test explanation, but even then did not give the full answer required.Now comes the hard part with the project to design the install for a catalogue shop. This is far more in-depth that I imagined too, so the estimated 40 hours of time required on it is a little too low I think.