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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

Determination of a Resistive PIS is described differently in Ed. 2 versus Ed. 3 of IEC 62368-1. Are they different test methods? How does one actually measure the power dissipated by a component or any other location?

What if a UL HazLoc customer does not want UL 62368-1 used as the applicable OrdLoc requirements in support of their UL HazLoc certification? Can UL 60950-1 or UL 60065 continue to be used for UL HazLoc certifications?

Between now and the established transition date of 1 December 2020, UL 60950-1 and UL 60065 can continue to be used as the applicable OrdLoc requirements in support…

Is similar support available regarding the transition of AV/ICT for hazardous (classified) locations as is available for AV/ICT for ordinary (unclassified) locations?

HazLoc

For DC powered products with internal PS2 circuits and containing only resistive PIS, does this construction require a Fire Enclosure?

For an outdoor access point, I have a question on the application and order of tests related to use of adhesive, and then application of mechanical strength and water spray tests.

Annex T

For AV/ICT equipment intended to be installed outdoors, is the 30Vdc limit for accessible parts from 60950-22 applicable, or do we apply touch current requirements as in IEC 62368-1 table 4?

Can UL 62368-1 be applied to battery-powered devices like smart phones? As a result, if used in the workplace, will such certified devices be in compliance with OSHA Regulations?

Annex M.2 of IEC 62368-1:2014 requires batteries & cells to comply with the relevant IEC standard, such as IEC 62133(2013). If a battery and/or cell complies with IEC 62133-1:2017 or IEC 62133-2:2017, do they also need to comply with IEC 62133(2013)?

Do parts for Repair / Service (RMAs) send to EU after 2020-12-20 require EN 62368-1 too? What would be the case if RMAs are not under warranty?

How to determine whether a component like cap., inductor, FET and IC is considered a Potential Ignition Source (PIS), and what is accurate definition of single fault condition? What is the implementation schedule of IEC 62368-1: 2018 (Ed. 3)?

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?

62368-1 Edition 3 IEC 60950-1

When a 60950-1 certified internal power supply is used in an end product, is it required that internal components of power supply – capacitors, GDTs, etc. - meet 62368-1 clause 5.5.2.1 / 5.5.7’s electric strength requirement?

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?

EN 60950

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?

HIPOT Test IEC 60950-1 62368-1

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?

62368-1 Edition 2 CSA/UL 62368-1 IEC 60950-1

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?

Edition No. 3 of IEC 62368-1 IEEE 802.3

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?

Annex A IEC 62368-1

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?

Edition No. 3 of IEC 62368-1 Annex K.7.1

Related to hiccup mode, how are power sources classified per 5.2.2 for a 3.6 V output?

IEC 62368-1 Edition 2 Edition No. 3 of IEC 62368-1

Which are the temperature limits during the abnormal operating conditions?

IEC 60065 Edition No. 3 of IEC 62368-1

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