On the dreaded 2394 - 2395 Course

[Chris Harrison]

Hi all New to the forums but been working in the industry for 10 + Years now have my level 3 and 17th edition. Employers just put me on the inspection and testing course, not sure what to think at this moment on my second day. Initial letter says 5 days but looks like after this week will have to go in for a further two more tests, seems like they throw quite a lot of content your way in such a short amount of time.
I like to think i have had a lot of experience with testing and inspection, done quite a few periodic inspections with 30+ Distribution boards and probably the most experienced in the class but i'm still bricking it!
Was wondering what these qualifications will actually mean for me or allow me to do if anything extra, i don't see what my employer gains from sending me on this course?

P.s. I don't think city and guilds know what they are even talking about sometimes, get this sample question for instance:

Increasing the length of a cable would NOT affect the;

a. Voltage Drop
b.loop impedance
c.rating of the protective device
d.insulation resistance

C&G's correct answer was C announced the tutor! I don't have high hopes for the real life test where i can put in the 100% correct answer only for it to be wrong.

 

[Dan]

I'm making no further comment as I'm not a Trusted Advisor!

You should be

That's not how it works.

 

[Richard Burns]

I would say that if the question were saying "if you only increase the length of cable what does not change?"
Then the rating of the protective device would not change as you have not changed it!
The choice of protective device may be altered by the maximum EFLI permitted for that device.
Volt drop increasing may limit your design current, not necessarily the choice of protective device.
Increasing the cable length would increase the surface area of conductors in close proximity and so will reduce the insulation resistance. This is similar to testing one circuit alone vs. testing multiple circuits simultaneously, though the resistances are parallelled in the multiple circuits scenario and so make a larger difference. However for a new cable the result may still be off scale in both cases. C is certainly the C&G answer!