Update creepage for IEC 61010-2-032 interpretation

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Hello Mr. @Barley_Li and the DigiKey community,

We have been working with your components for several years now and I saw that you were very active on the Digikey forum, particularly in terms of standards (IEC 61010-1, IEC 61010-2-032, 031 etc.)

So I have a question…

We will update our products according to the latest IEC 61010-2-032: 2023

And in this one since 2019 there has been an update where it is written, I quote:

“Reduced creepage distances can comply with material group I for all insulating materials. »

This is subject to interpretation, I need your thoughts on the top.

Suppose I have a measuring device that is 1000V CAT III pollution grade 2 that is in the final stages of finalization for test passes for the IEC.

​ The device is made of category III materials because we cannot find the indication of its CTI.

So III.

So it corresponds to table K.3 of 61010-1:

image_2024-02-08_163536239
image_2024-02-08_163536239802×423 84.4 KB

But following the 2019 update:

“Reduced CREEPAGE DISTANCES are allowed to be according to material group I for all insulating materials. »

Can we say that the creepage distance can go from 10 to 8 mm?

Thank you all for taking the time to read me, and if you have any information don’t hesitate, have a good day :slight_smile:

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Hi camille.rannou ,

I believe you are correct, however one of our engineers may be able to provide a better response.

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Hi @Ryan_2724 , thank you for your response, it is true that we are in the process of bringing together several sources of information and this is consistent with this interpretation of the standard, I look forward to seeing the response from your engineers, thank you again! you are great!

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One should examine the context of the quoted statement for qualifying information. To take that single sentence in isolation would appear tantamount to the outright abandonment of the Material Group concept for creepage purposes, which seems unlikely.

Lacking ready access to the updated standard at the moment I don’t have a lot of insight as to what the context missing from the quotation might be. It would seem imprudent however, to spend effort on redesigning an existing product to have reduced creepage distances prior to being quite confident that the result would be acceptable.