E
Elidor
Would very much appreciate some feedback from experienced PAT testers on this topic. It has been raised previously but I don’t believe it’s been addressed in the level of detail needed to put this issue to sleep forever, at least for me that is lol.
I have broken it down to 2 questions.
1) Is a laptop / mobile phone charger considered to be IT equipment?
Most are officially Class I devices but have no exposed conductive parts other than the DC end of the power supply where some have continuity from the earth pin of the plug to the outer ring of the DC connector but have very high impedance and would technically fail the 100mA earth continuity test and some have no continuity from earth pin to any part of the DC connector with no safety isolation symbol on the device.
2) If I’m unable to confirm the device conforms to BSEN 60950 and don’t want to risk the insulation resistance test, would the substitute / supplementary touch current test be pointless without the DC end of the power supply being under load which would mean connecting to the IT equipment I don’t want to risk damaging?
If all IT equipment will leak hence the requirement for functional earths, why are some IT power adapters supplied as Class II with no earth?
I have broken it down to 2 questions.
1) Is a laptop / mobile phone charger considered to be IT equipment?
Most are officially Class I devices but have no exposed conductive parts other than the DC end of the power supply where some have continuity from the earth pin of the plug to the outer ring of the DC connector but have very high impedance and would technically fail the 100mA earth continuity test and some have no continuity from earth pin to any part of the DC connector with no safety isolation symbol on the device.
2) If I’m unable to confirm the device conforms to BSEN 60950 and don’t want to risk the insulation resistance test, would the substitute / supplementary touch current test be pointless without the DC end of the power supply being under load which would mean connecting to the IT equipment I don’t want to risk damaging?
If all IT equipment will leak hence the requirement for functional earths, why are some IT power adapters supplied as Class II with no earth?