Comp'Ex' Fail Ex03R

[Andy67]

Hi Everyone
Thank you for accepting me into this group. I'm obvoiusly new to this forum so please excuse any mistakes untill I familiarise myself with the site.

I have just failed my Comp'Ex' Installation / Selection 'IS' (Ex03R) On-line resit for the 2nd time and I have absolutely no idea where I'm going wrong.
I have been Comp'Ex' certified for over 30 years and have never failed the course or refreshers up until now. I was actually reasonably confident the first time but less so the 2nd time on account of the fact that I didn't know what I'd done wrong. I'm even less confident in passing the resit on my final attempt.
I'm unable to find any on-line 'Installation / Selection' simulators or even any guidance / tips on how to pass the Ex01R & 03R units or what to look out for.

Correct me if I'm wrong but there doesn't actually seem to be that much to consider when selecting IS equipment for hazardous areas other than the following:

Correct equipment for Zone (EPL / Category), Gas Group / Sub-Group (IIA,B or C) & Temperature Classification (T1-T6).
Minimum IP54 so IP washers may be required if thread depth is < 6mm
Number of cable entries when selecting enclosures.
Simple / non-certifified equipment allowed provided its listed on documentation.
Certified enclosures required only if 2 or more IS circuits are contained within otherwise can be non-certified provided they meet IP and impact requirements for area.
The correct glands, stoppers & assessories (IP washers & earth tags) most be used to suit the equipment eg Ex'd' or Ex'de' glands must be used for Ex'd' enclosures etc.
The correct glands must be used to suit the cable type (SWA / Non-SWA).

I can't really think of any other rules concerning IS equipment selection having refered to course notes and Toolbox hand book.

Is there anybody out there that has extensive knowledge on this subject 'Specifically Ex03R' or that has maybe recently completed this unit that can shine any light on my predicament or perhaps offer some guidance / tips. For those who don't know, the refresher course format has changed somewhat in the last few years - what they term 'Practicle assessments EX01R & EX03R' are actually purely PC based on-line assessments.

Thanks in advance for taking the time to read this and hopefully reply.

 

[brodders97]

Hi Andy,

go to this thread Compex Training Advice Available - https://www.electriciansforums.net/threads/compex-training-advice-available.170720/page-5#post-1641758
Or message the guy running the thread, his name is Colin and he taught me compex at Scunthorpe heta, the guy knows his stuff and is happy to help

cheers

 

[timbobelfast]

Hi Everyone
Thank you for accepting me into this group. I'm obvoiusly new to this forum so please excuse any mistakes untill I familiarise myself with the site.

I have just failed my Comp'Ex' Installation / Selection 'IS' (Ex03R) On-line resit for the 2nd time and I have absolutely no idea where I'm going wrong.
I have been Comp'Ex' certified for over 30 years and have never failed the course or refreshers up until now. I was actually reasonably confident the first time but less so the 2nd time on account of the fact that I didn't know what I'd done wrong. I'm even less confident in passing the resit on my final attempt.
I'm unable to find any on-line 'Installation / Selection' simulators or even any guidance / tips on how to pass the Ex01R & 03R units or what to look out for.

Correct me if I'm wrong but there doesn't actually seem to be that much to consider when selecting IS equipment for hazardous areas other than the following:



I can't really think of any other rules concerning IS equipment selection having refered to course notes and Toolbox hand book.

Is there anybody out there that has extensive knowledge on this subject 'Specifically Ex03R' or that has maybe recently completed this unit that can shine any light on my predicament or perhaps offer some guidance / tips. For those who don't know, the refresher course format has changed somewhat in the last few years - what they term 'Practicle assessments EX01R & EX03R' are actually purely PC based on-line assessments.

Thanks in advance for taking the time to read this and hopefully reply.

Andy, is this the IS smoke detector part of the practical?

Been a few years since I sat a re-refresher, but due to sit within the next 12 months.

Did you follow the hock wiring diagram, eg the cable screen for the cable? It should float in the 'field' and is tie down to earth at the IS barrier side.

Where did you take the test?

 

[Andy67]

Andy, is this the IS smoke detector part of the practical?

Been a few years since I sat a re-refresher, but due to sit within the next 12 months.

Did you follow the hock wiring diagram, eg the cable screen for the cable? It should float in the 'field' and is tie down to earth at the IS barrier side.

Where did you take the test?

Hi
There may have been a smoke detector, honestly can’t remember. It’s the PC based on-line practical. Think there were 13 questions on Exe, Exd, Exn etc (EX01R) then 13 questions on IS (Ex03R). You are given an image of a piece of equipment with one or more cables entering. You are told what type of cables they are and the area details ie Zone, gas group, sub division, T class, IP and EPL/Category. You then have to select the correct equipment code from a drop down menu (you are given a separate book which tells you what equipment the code relates to). You then select IP washer, gland, thread adapter, stoppers, lock nut, serrated washer, earth tag, as or if required.
It’s purely about selecting the correct kit for the area.
I did it at TTE in Middlesbrough.
Thanks for the response
Andy