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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
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?
Related to hiccup mode, how are power sources classified per 5.2.2 for a 3.6 V output?
Which are the temperature limits during the abnormal operating conditions?
Why did UL 62368 not use UL 101 method ("e" is always open) to measure touch current? what's the background?
We have a heatsink on our product made from EPP. The temperature of this heatsink will reach 100°C max but won't need to be touched to use the product. Unfortunately it's impossible to stick something on the EPP to warn the user. What can we do?
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.
Ref. 6.4.8.2.2: Do components that fill an opening in a fire enclosure have to be V-1 , regardless of their proximity to a PIS?
For a remote control with a user replaceable coin battery, s-cl 4.8.2 requires an instructional safeguard. Can text (element 2) be replaced with a symbol (e.g., element 1b of Annex F.5)? Alternatively, does a suitable symbol exist for element 1a?
Does IEC 62368-1’s Annex G.8 allow me to test the combination of varistors rather than individual varistors?
What are the rules for opening size, number of openings and minimum spacings between the openings per 6.4.8.3.3 and 6.4.8.3.4 of a fire enclosure? When is testing required? Does the standard allow for a mesh or grid to be provided to cover the openings?
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)?
I have a question on a GDT connected in series with an MOV in Type A pluggable equipment and how this construction impacts application of 5.5.7, G.8.1 in the context of post production Hi-Pot testing at 1.5 kv.
For IEC 62368-1 and IECEE CB Reports to it, are IEC 60127-1 fuses required?
Is it possible to use some of the latest provisions in Ed. No. 3 IEC 62368-1 for Ed. No. 2 IEC 62368-based certifications of AV/ICT equipment while industry waits for Ed. No. 3-based versions of EN, CSA, UL and other national standards?
According to IEC60950-1, Chapter 5.2 Electric Strength, Table 5B, the test voltage is 1500VAC for a device with basic insulation and 230VAC operating voltage. Where can I find this test voltage for such a device in IEC62368-1?
IEC62368-1 has three methods for determining the electric strength test voltages. Those are explained in sub-clause 5.4.9.1. As stated, the highest value calculated…