|
|
|  DSH 3858 @0 E# A9 m& L/ A6 t
7 F# ~- r( S" L8 v4 l" S) k: _* Q5 R7 q5 O7 ~1 e# J3 `, n
| Flammability of materials and components2 |# |) W3 I# s, T: U" v1 P
| 4.4.3
- [" r" N: F6 F: u7 s | 60950(ed.2)4 t4 f( T. j) W; K2 _+ `
|
6 n6 U3 o: s! f# m6 cStandard:
, n3 u# k4 H9 z& I9 r DIEC60950, 2nd Edition t6 D7 H, v: z; L- n3 O1 x
Sub clause:" P0 I" H; L8 p7 p5 g+ j' O' m- g
4.4.32 Z% V9 d8 c7 Y! ] d& x
Sheet n. 385' C/ }# V: G: @3 z' o/ P
Page 1 (1)0 s5 N) z$ [6 [& z/ s
Subject:
7 h- I4 {. b- D- `9 _# W7 HFlammability of materials and ?3 v L) ^1 Y1 P
components# C5 `9 v" [: v3 f
Key words:5 X& k$ _2 q. A8 q9 p
-Fire enclosure, J; R( P+ A' \- B1 q
-Flammability* `3 `. @9 t# T: u8 x
Decision confirmed; { W& }/ ]& j
at CTL 38th meeting1 m; J2 D+ O$ S: x, V, Y' Z
Question:
7 T1 j8 g4 E* ^4 yIt is allowed to add decorative parts with flammability class HB to the outside of the fire8 @. F1 p, u: O; j
enclosure of, for example, a computer. Consider the situation that the computer is, then,
1 q! p7 t+ ]2 B) `installed inside the fire enclosure of bigger equipment. According to the standard, parts& m6 Y) x) g% B& |& i4 p
inside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.2
2 e) n! |, c0 J) k9 c0 r9 ^ M1 uand 4.4.3.3: all materials inside a fire enclosure must be of flammability class min V-2 or1 {6 A" q: p: t1 z9 g
HF-2. It is not clear whether the decorative HB material on the outside of the computer is4 A3 _( v4 h& o8 N
exempted from this requirement since the computer has been approved separately9 A$ q) R& g5 j9 i! O8 B( v
Decision:
$ D6 ?4 z: t0 W% QHB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.
& F) ] Y7 r; t J2 a/ Q: g5 V" {6 B1 E" [) Q8 v5 i/ o" s* x
, J( g$ d% a" q |
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