Flammability Requirement for Gaskets and Seals - UL 61010-1

[occounty]

Hello,

We are trying to get our upcoming new product certified to UL 61010-1. Currently we are stuck with the gasket for 8 inches by 15 inches in our product. Is there any specific requirement for the flammability of gaskets/seals? I was not able to find anything specific in 61010-1 standard.

Thanks in advance!

 

[CharlieUK]

It depends on where the gasket is.

Easiest route to compliance is generally containment option in Figure 11, so if you meet clause 9.3.2 (b) then I don't think there should be much on an issue.

What flammability rating does the gasket have?
Is it fitted in any kind of recess, or just sat between two flat surfaces?

 

[occounty]

Hello,

The gasket is located in the trace in the polymeric enclosure and the polymeric door both of which are ULV-0 rated. This part of enclosure houses three heaters raging from 10 W to 60 W.

Thanks for help.

 

[occounty]

The gasket is in recess.
9.3.2 requires that enclosure and flame barrier of non-metallic materials shall have a flammability of V-1 or better.

Now, in our case the enclosure is rated V-1, but the question is how about gasket? The gasket sits in the recess on the edge of the compartment which happens to be flame enclosure.

Thank you for your support.

 

[CharlieUK]

Does the enclosure meet fire enclosure design requirements if you ignore the gasket

 

[Cotas]

Hello, I'm experiencing the same problem. The gasket is UL94 HB but is just a sealing part to achieve the IP65. Is placed in a groove of a UL94 V-0 material.
Is there any specific requierement or can i use this material for the gasket? which text of 61010 standard justifies this?

 

[CharlieUK]

If the slot is not on the base of the product (bottom side of product when installed according to instruction), and not within a 5deg arc as per 9.3.2(c) then it doesn't matter

If it is, then whilst EN 61010-1 doesn't allow for slots in fire enclosure, EN 62368-1 cl. 6.4.8.3.3 allows slots up to 1mm wide irrespective of length - so if the gap between the mating parts of the V-0 material, when seen from the inside of the product are < 1mm when the product is correctly closed and tightened, then I think you should be fine