Basic Testing Procedures

[almac]

Can these procedures be carried out by non electricians... I have my city and guilds pat testing and an HNC in electronics wondering if that makes me competent?

 

[leascliffe]

The actual supply is not switched off, the installation past the main breaker is switched off granted but not the supply. Anyone just about to take the 2391 practical may be confused as books including GN3 and OSG use the CRIPLER method and this is the way i've been taught to test within my 2391 course;

Dead tests:

Continuity of circuit protective conductors
Ring final circuit conductor continuity
Insulation resistance testing
Polarity

Live Tests:

Loop impedance test external (Ze)
Earth fault loop impedances (Zs)
RCD testing

Hi,

Thanks to Sintra for the original post! I agree with SafetyFirst, we were taught the CRIPLER method when I did the C&G2392 a few months back.

 

[ROY2612]

Thanks for the great info. Cheers

 

[brav]

Except that you don't have to follow any particular order in the 2391, as it's a PIR that you are completing, not an Initial Verification.

You can basically test in the order that suits you best.

yeah u can do polarity at the same time as continuity using Method 1.

Cracking posts tho lads

 

[WhiskeyDog]

Can these procedures be carried out by non electricians... I have my city and guilds pat testing and an HNC in electronics wondering if that makes me competent?

Hi Almac, Ive read elswhere that you need the 2391 to prove you are competent to carry out these tests, unlike PAT testing where it was argued you did not the C&G to carry out PAT.

 

[Current Affairs]

Continuity of ring final circuit conductors

I would just add

When measuring at each socket outlet the values should be approximatley the same and the value will be approximatley one 1/4 of the Line plus Neutral loop resistance ie (r1+rn) / 4 with the exception of spur's which will have a higher resistance.

Calculation should also be checked again between Line & CPC (r1+r2) /4

 

[euron]

Excellent Post.

 

[topcat]

Excellent post helped me pass my 2392 thank you

 

[JoshuaPaul]

Great post easy to understand

 

[2012mate]

Thank you.

 

[trev]

Hi Almac, Ive read elswhere that you need the 2391 to prove you are competent to carry out these tests, unlike PAT testing where it was argued you did not the C&G to carry out PAT.

IMHO all electricians should be competent to test their work, when I served my time there was an inpection and testing module and I had testing procedures hammered into me. Maybe I was lucky that I had a swine as a mentor because I've worked with lads who didn't have a clue how to do it, others have refused to test as they didn't have the qual.

 

[Zorro]

Crippled
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P
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[U9E]

Dear all, I'm beginner for testing.I'm using fluke1652 multifunction tester.when I try to get PFC reading set Zi and choose L-PE and test with N,PE,L 3 leads got reading PFC Ik about 2.5ka.But I switch to L-N and N,L 2 leads(or 3 leads neutral and earth probes together at neutral point)for PSC Ik got reading about 10ka.In theory compare PEFC and PSSC and higher one should be PFC.Anyone familiar with fluke 1652 and experienced tester can explain me which reading should be my PFC? or something wrong on my testing procedure Main switch off at DB supply side. Regards, U9E

 

[Zorro]

Hi the worst case scenario i.e highest value should be recorded as your PFC

 

[Zorro]

If 3 phase the prospective short circuit current should be times by 2