I would agree with you if it said 'Material that fills an opening...',
but it says 'Material for components that fill an opening...', which is
just differently bad. It appears to apply only if there are more than
one component in the opening, but all consist of only one material. In
that case, one can distinguish between the opening and the items that
enter/exit through it.
But why would anyone put a component half-inside and half outside a fire
enclosure?
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
The UK is a sovereign state, not a Zollverein state
On 2019-05-17 18:58, Richard Nute wrote:
Hmm. Interesting English usage statement.
If something fills an opening, the opening no longer exists. So, how
do you know how to apply the requirement?
Rich
*From:*Payne, Glyn <00000d283c0acebb-dmarc-requ...@ieee.org>
*Sent:* Friday, May 17, 2019 6:40 AM
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* [PSES] 62368-1 Openings in a fire enclosure
Hi Experts,
I have a EN 62368-1 question regarding openings in a fire enclosure…
*6.4.8.2.2 Requirements for a fire enclosure *
Material for components that fill an opening in a *fire enclosure *or
that is intended to be
mounted in such opening shall:
* comply with the flammability requirements of the relevant IEC
component standard; or
* be made of *V-1 class material*; or
* with Clause S.1.
For PS2 and PS3 circuits I have been told by a test house that
connectors in fire enclosure openings /only/ have to be V-1 class
material if they are close to a potential ignition source (PIS).
My interpretation is that a fire enclosure is a fire enclosure,
regardless of where, within a fire enclosure a fire may start and so
anything filling an opening must be V-1.
I am interested to know how do other engineers interpret this clause.
Many thanks,
Glyn Payne
Compliance and Design Support Engineer
Solid State Logic UK Limited
Registered as a limited company in England and Wales (Company No:5362730)
Registered Office: 25 Spring Hill Road, Begbroke, Oxford OX5 1RU, United Kingdom
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