Get the hard facts to successful 62368 compliance from your UL experts
The IEC 62368-1 Knowledge Hub covers an exceptionally wide range of topics, which we believe can be helpful to manufacturers and distributors of A/V & ICT equipment.
This Q&A includes many of the questions we have been asked, with answers from UL experts. Registered users may also submit additional questions related to the 62368: UL has the answer.
Q&A: You ask, we answer
Does IEC 62368-1 2nd Ed or 3rd Ed require an additional external fuse to be added to an already certified Annex CC current limiter in PoE Circuits?
Do Suppliers of components (actives and passives) to power supply manufacturers and equipment manufacturers need to certify to 62368-1 and what are those tests required?
Does the "any two leads" short exemption in B.4.1 apply to all pins on the current limiter IC complying with Annex G.9 or is only the requirement for shorting input to output waived as is implied in G.9.1?
Is additional Annex M evaluation still required if a Li-Ion battery pack certified to IEC 62133:2012 and UL 2054 is used in a host product? Will a battery pack certified by IEC 62368-1 be accepted in a host product investigated to IEC 60950-1?
What is the intent of 8.7 of UL 62368-1 for equipment mounted to a wall, ceiling or other structures? Does it cover the mounting means and equipment only, or does it include the equipment, mounting means and mounting to the structure?
When are POE and USB ports required to be marked with the output voltage and the output current according to CSA / UL 62368-1 F.3.3.9DV.1? For POE, can we mark "POE" or "POE+" etc. to replace voltage and current?
What is the requirement for a pluggable connector located in PS3 circuits and used to connect/disconnect with/without load?
I want to know more about creepage and clearance distance measurement, as here they are given for the peak voltages above 330V - what actually would the limits be for psu with 240 Vrms and also for 48V Dc powered?
Does pluggable type B equipment with an Ethernet port need to be provided with a permanently connected protective earthing conductor to comply with the requirements in Clause 5.6.7?
Per M.4.3, a fire enclosure is required for secondary lithium batteries. In the case the equipment enclosure does not meet the criteria of 6.4.8, such as being rated HB, can a fire barrier fulfill the intent of the requirement?
For gaskets used to seal a component to prevent water entry in an outdoor enclosure, does Annex Y require a UV radiation test on the gasket in addition to regular gasket tests?
Is Canada, Europe or the US considering an additional extension into 2021 for 62368-1 2nd Ed in light of the logistics and testing disruptions or potential disruptions due to the Covid-19 outbreak?
How do the requirements in clause 5.4.11, which requires external circuits to be separated from earth in 'normal' pluggable equipment type A, apply to the shield of an external cable? Can the shield be connected to earth?
With regards to Clause 6.2.2 of IEC 62368-1:2018 (3rd edition), what is the failure criteria of PS1 under abnormal and single fault conditions on load and power source circuits?
With regards to Clause 4.1.1 of IEC 62368, would an external power supply, either brick type or direct plug into wall adapter, be considered an external component of a device? Wondering if the 60065 and 60950 approved EPS needs to be updated.
If a product is using a power supply certified to IEC 60950 or IEC 62368, with direct connection to the appliance mains inlet, does the 'Stored discharge on capacitors' test of 18.104.22.168 still have to be done?