GS38 Test leads

[fredrico]

Hello people, can anyone clarify to me, which testers need leads to GS38. I always thought that all testers, ie low resistance ohmmeters, insulation resistance ohmmeters, earth fault loop impedance etc.. had to have leads to GS38. Then our lecturer on the 2391 course told us that , testers that did the dead tests like the low resistance ohmmeter and insulation resistance ohmmeters did not need them. However, in reading the latest examiners report of the 2391 exam, posted on this forum, in states that candidates lost marks for not putting down that insulation resistance ohmmeters need leads to GS38. I am confused. Not good when our exam is next thursday.



Cheers

 

[spark 68]

Hi mate,

On page 81 of GN3, 3rd paragraph, states GS38 should be observed for all instruments.

good luck! with the exam, I have mine on the same day

 

[fredrico]

Cheers spark, yes i have read that, thats why i was getting confused with what i have recently been told. Good luck to you too.

 

[stuart569]

Ask your'e lecturer to justify his statement against what is said in GN38!What hope have you guys got when your'e lecturer can't get it right

 

[spark 68]

Cheers,

There are a few other anomilies with the chief examiners report too.
On one part of the report it says candidates have been deducted marks for incorrectly using 16th ed terms such as "Main Equipotential Bonding" but this term is used on the PIR certificate (p101 GN3) and on the diagram fig 2.3a in GN3 p39,
nice to see some joined up thinking

 

[kenny7askew]

I did 2391 in july and i was taught at college that GS38 leads only applied to live tests for safety reasons so i only mentioned them in questions about live tests and i passed,good luck

 

[Plonker 3]

GS 38 is a HSE issued guidance sheet, so stating that they comply with any test test is correct. As I believe it says that all tests instruments must comply with it.

 

[fredrico]

Changing the subject a bit, it says in that report about disconnection time for a 300mA RCD. Where does it say times for that in regs book, i cant find it, although i think the disconnection time is 300ms, for a BSEN 61008 and 61009.

 

[kenny7askew]

sorry after reading your post again insulation tests need GS38 leads because you can test at up to 1000v

 

[spark 68]

Any RCD used for additional protection @ 30mA or below is tested at 1/2 *1 and 5*Idn (max 40 mS), every other RCD is only tested at 1/2 and 1*Idn , so a 300mA is only tested @ max *1, it also depends if it is a BS type 200mS, or a BSEN type 300mS, unless it is a time delay type

Edit: meant to say max disconnection times

 

[GLENNSPARK]

theres usually a question about test leads on the 2391 so be aware. What i did was to head the answer with either "this is a dead test" or " this is a live test" before going on to explain how to perform the test....and dont forget to mention to "ask permition from the person ordering the test or any other interested parties" and to do a safe isolation etc as failure to mention any of these things will lose you marks guys....
Glenn.

 

[UKMeterman]

Hi.
Are GS38 leads to cope with if you should test on a live, high energy circuit deliberately or otherwise and there is a fault in the instrument so fuse protected and also designed not to be miss connected or otherwise cause a short. This is all to do with the avaliable energy, and not say because it is a 1000V megger

 

[stuart569]

Hi.
Are GS38 leads to cope with if you should test on a live, high energy circuit deliberately or otherwise and there is a fault in the instrument so fuse protected and also designed not to be miss connected or otherwise cause a short. This is all to do with the avaliable energy, and not say because it is a 1000V megger

Have i had too many tins or does that make no sense?

 

[GLENNSPARK]

surges, lightening strikes and transients coming in during a test.....

 

[spark 68]

Hi.
Are GS38 leads to cope with if you should test on a live, high energy circuit deliberately or otherwise and there is a fault in the instrument so fuse protected and also designed not to be miss connected or otherwise cause a short.

Probably all of the above, hence the 500mA fused leads, finger guards and shrouds and max 4mm preferred 2mm tips, which means you cannot get the bliddy probes in