2391 Inspect and test help and guidance.

scope02 · Nov 14, 2011

Thank you for the responses bruce and john there really informative, i've been studying like mad, I've got books on practically everything to do with this exam, but if there's anymore link or suggest that you got or think might help don't hesitate in sending them across, more infomation is good information.. Bruce the GN3 book now is like bedtime reading material, GN3 will certainly send any child a sleep quickly. lol.

brucelee · Nov 14, 2011

yeah mate its jsut slightly easier to read than the regs lol the worst stories i ever had to read lol its hard not falling asleep
learn zones for bathrooms etc and what Ip ratings in them and also what other zones there are in part 7 like sauna heaters
Ip ratings for everyhting
basically as well as GN3 learn everyhting in part 6 and 7
Purpose of periodic inspection report
purpose of initial verification
learn all rcd trip times and different size of rcd and uses
but GN3 has the majority of info in but some things come up in the exam that aerent in there so read every book you can do loads of sample papers
inc exam success as it gives you practice and will also teach you how to answer and some of the questions will come up matbe not exactly but worded slightly differently
make sure you use correct terminology as this is key you may know but if you dont answer with it how its worded in regs or gn3 you will get 0 points

good luck mate keep at it you will get there at least your giving yourself a chance by revising unlike most who just turn up expecting to pass

scope02 · Nov 15, 2011

Cheers bruce for all your help and to the other members who have contributed, I will certainly be as prepared as i can be, i know about the terminalogy part c & g love that stuff, but it's quite tricky to digest after 3 hours of reading, all the section start looking like one another.. lol. Cheers for the heads up on the special locations and part 6 and 7, looks like another thing to revise. ha.

scope02 · Nov 15, 2011

Bruce i've just read your post for the practical side of the 2391, it's a great post, Only one thing still can't get my head round is the testing for the motor, or the mock assesment bay for the 2391 is saw 3 weeks go had an undervoltage protection device in the circuit before the motor. Trying to recall how i tested the motor circuit before when i took my 2330 l3 exam, think it's somthing like continuity: r2 to r2 in the motor, insulation reistance : think i connected the live nentral and earth in at the same time, to not damage the windings, zs was at the motor head cover, with all three probes (nulled) on the E,N & L, suppose i could do the calculated zs instead. does that test squence sound ok to you or to anyone else?

brucelee · Nov 16, 2011

Hi mate

for the ZS calculate from Ze + (R1 +R2) you only have to test ZS on the sockets

jsut do the con and IR and calc the zs Its a motor circuit but there isnt actualy a motor connected jsut had a 3 phase commando socket outlet well at least thats how it was at the college i went

scope02 · Nov 16, 2011

Cheers for that mate, so more or less you could tecnically cal the zs for most of the circuits? Where's the fun in that. ha.

scope02 · Nov 24, 2011

koosk and control panels

Re: Submersible Pump...

Hi All,

Hope you can help, I'm new to this sector and thought if any one would offer help and guidance to this question it would be the people on here?!

I've recently moved into a sector of wiring that i'm unfamilar with, it classed as commercial installs, and it involves wiring up new control panels in kiosk and inside commercial premises.. The work is for the lovely world of drainage, so pump pits etc.. My question is what is the best way to approach the install, do i calculate the size of swa on the size of submersible pump thats being installed?? i don't have much experience in the electrical industry, i've done my 2330 l2 and l3, 17th edition and 2392, but because of it being a specialist area,it's thrown me slighty, so i thought you guys could help on this question??

Kinds Regards

Scope02