What to PAT test

[zacazoom]

Could someone help, Been doing some reading on what you can pat test, I understand they say you can pretty much test anything with a plug, however does this also mean DC appliances and if so what tests would I perform, would I still perform a 500 V or 250 V test. Also would you test say a mobile phone charger and then with the phone attached and again what tests would I perform.

Thanks

 

[acat]

Anything with a plug on it that is single phase or three phase if you have the adaptors. Mobile phone charger yes mobile phone no.



Chris

 

[zacazoom]

What about a ordinary digital phone that sits in a DC cradle. Would I not test it with the phone in the cradle.

So just to confirm, if I had a DC adapter connected to an appliance to make it work constantly that does not have a battery, I could test this without a problem and the amount volts and I could test on could be 500 V ins res providing it meets the relevant Britsh standard.

Thank you for your response

 

[acat]

At a push you could do the plug that goes into the mains socket. If you test the phone itself you may blow it. Dont forget any sensitive equipment like computers, photocopiers, cash tills, etc etc have to have a very low current or you will blow them up.



Chris

 

[Deleted member 9648]

You cant test items like phone chargers and phone cradles....there is nothing to test as they are class 2 with no exposed metal parts.....a visual inspection only is appropriate.

 

[acat]

Dont agree class II equipment is not just visual, insulation test, operation test earth leakage etc are all carried out. The only test left out is the earth bond test for obvious reasons. It is only if it fails the visual that you would not carry on.





Chris

 

[zacazoom]

So i could test it as if it was IT equipment , For example the 100mA test, but not do the insulation resistance test.

 

[acat]

Have you got a copy of the code of practice. Dont test the phone the plug that goes into the socket class 1 or class II does not matter that needs to be tested, same with mobile phone its just the charger. If either had a leakage to earth that was not picked up on the visual and you took the plug out without switching the socket of you would become the earth path.





Chris

 

[Deleted member 9648]

Can you please explain acat how to do an insulation test on a class 2 appliance with an all plastic case ,and what such a test would achieve?
You can only insulation test a class2 appliance if it has exposed metal parts,using an auxillary probe from the pat tester onto the metal parts.

 

[rodney12]

Think you may be a little confused, if it has exposed metal parts it should be class I, not II.

With regards to ins res test on a class II appliance you just plug it in you tester and bobs your uncle