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: List of articles with 6
Can the requirements for protection of wound components against mechanical stress in G.5.1.2 be waived if an Insulation System is used according UL 1446?
Why was the 250VA limit under G.9 removed in IEC 62368-1 Edition 3, and when applying IEC 62368-1 Edition 3, why does it reference IEC 62368-3, when IEC 62368-3 itself refers to IEC 62368-1 Edition 2?
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?
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?
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?
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 22.214.171.124 still have to be done?
We have power supplies & PDU (EN 60950-1 certified) which are shipped as spares with our system or our customer can buy later – since after Dec. 20, 2020 EN 60950-1 will be withdrawn, how will we be able to ship these power supplies/PDUs to Europe?
I noticed that EN 60950-1 is no longer shown under the LV Directive standards (column 2) in the Official Journal (OJ) of the EU. I thought it was going to be withdrawn next year?
A PSU certified to 60950-1 passes HIPOT test at 2121 V DC between PRI and earth. When it is used in an end product to be certified to 62368-1, does it need to withstand the end product HIPOT test that could be more than 2121 VDC, e.g., 2500 V DC?
Have any other countries / regions been identified other than the EU that will not accept legacy end products certified to 60950-1 (or 60065) after December 20, 2020?
As for the IEC62368-3:2017, the test methods for specified ports (USB or PoE) under different conditions are not clear. Will these parts be clarified?
How to understand the highest and lowest specified charging temperature in Annex M.4.2? Can we regard the "charging operation temperature" in the battery specification like 0 -45 degree C as these two temperatures?
Could you explain more details about Annex K.7.1? Especially for the first 4 paragraph? In actual practice, the interlock switch used in mains circuits hardly have 3mm contact gap. what should i do for this case?
Why did UL 62368 not use UL 101 method ("e" is always open) to measure touch current? what's the background?
What kind of ES class can we define for the secondary circuits(SELV) of one AC PSU certified according to 60950-1 previously now need to comply with 62368-1:2014 Ed.2, the AC PSU can meet SELV requirement, but cannot meet ES1 requirement.
What is the process for developing, and current status of the next CSA & UL 62368-1 bi-national standard to be based on IEC 62368-1:2018 (Ed. No. 3)?