Proving dead at the CU

[Jimmy Boy]

If you have a Proving unit and it isn't working/calibrated you shouldn't be doing an on site assessment period

 

[Deleted member 19807]

my proving unit dose not require calibration, it just gives out voltage when i stick my voltage tester probes in it to prove my voltage tester is working.

 

[Jimmy Boy]

Mate all testing equipment needs to be calibrated, and proved with a certificate.

 

[IQ Electrical]

Mate all testing equipment needs to be calibrated, and proved with a certificate.

In my many years in this business I have never calibrated or been asked to calibrate a proving unit, nor can I find any requirements to calibrate!

Of course the calibration companies will provide this service if asked, in return for £40 or £50 but then again, they'd probably calibrate a Thermos Flask if you requested it.

 

[eskimo39]

You do not require a proving unit if you follow the safe isolation procedure.

After identifying circuit to work on you test your tester on a known supply (This can be the incomming tails before isolation, a proving unit or a different circuit). If all LED's light up you know it is working so you then test the supply you have isolated.

If correctly isolated, no LED's will light up!!!

Then re-test you tester on known supply (to check all LED's are still working and it hasn't died between proving and checking isolation) if all LED's light up, then you know the isolated supply is dead.

This might be usefull here : http://www.esc.org.uk/pdfs/business-and-community/electrical-industry/BPG2_09.pdf

Check out page 13

Cheers guys

 

[Jimmy Boy]

In my many years in this business I have never calibrated or been asked to calibrate a proving unit, nor can I find any requirements to calibrate!

Of course the calibration companies will provide this service if asked, in return for £40 or £50 but then again, they'd probably calibrate a Thermos Flask if you requested it.

Well although no requirement to under BS 7671, 612.1 refers to requirements, and best practice and common sense would say you should...

http://www.esc.org.uk/pdfs/business-and-community/electrical-industry/BPG7_10.pdf

Also this clip from DIS registration from NICEIC...

A check of test instruments and leads used for
certification purposes. As a minimum, the business
needs to have access to instruments to provide
voltage indication and to test insulation resistance,
continuity, phase/earth loop impedance and residual
current devices. You should have records to
demonstrate that a system is in place to ensure the
accuracy and consistency of test instruments used
for certification purposes. These will need to be
available for inspection. An example leaflet is enclosed
with this pack.

http://niceic.com/Uploads/File2368.pdf

 

[IQ Electrical]

I have a copy of that form but it doesn't call for monthly or any other such checks on a proving unit does it?

 

[Jimmy Boy]

IQ I misread you OP I thought you said no test equipment needed calibration I apologise.

100 Lines...

must read slower
must read slower
ATB Steve

 

[IQ Electrical]

IQ I misread you OP I thought you said no test equipment needed calibration I apologise.

100 Lines...

must read slower
must read slower
ATB Steve

I thought it was weird that you were persisting with it!

 

[Jimmy Boy]

I should learn my lesson and not read forum posts on a day off prior to drinking copious amounts of Wife Beater.........lmfao

 

[roukel01]

never owned a proving unit, and never had to show safe isolation at any assesment. Flick the main switch off and the lights go out! usually enough proof for me to start work on a domestic CU.

 

[Des 56]

never owned a proving unit, and never had to show safe isolation at any assesment. Flick the main switch off and the lights go out! usually enough proof for me to start work on a domestic CU.

Thats sure to make the health and safety brigade squirm
The knuckle wrapping will soon begin

 

[roukel01]

Thats sure to make the health and safety brigade squirm
The knuckle wrapping will soon begin

Thought you'd like that one!!!

 

[Jimmy Boy]

your knicked my old son

 

[ian.settle1]

Thats sure to make the health and safety brigade squirm
The knuckle wrapping will soon begin

Squrim squirm now where is that cane?