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|  DSH 385' @+ C: H9 g) y& `, l
, G0 v/ a, h/ q
7 O6 H- \) ~# ~7 z' K | Flammability of materials and components# t- L) T" L/ `6 }
| 4.4.3, {% y. [" `3 L2 y; \
| 60950(ed.2)& w+ p' {$ w4 I% R+ a( s8 v
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1 {+ @% w( e) ~, Y
Standard:
- @- i) Z0 V! _ i1 ~ VIEC60950, 2nd Edition: S2 o% D! `+ m' K3 O
Sub clause:
) Y9 b+ f, R4 d1 v6 N1 N0 S$ g! H4.4.3
; O, `8 F- `! x( r. t* LSheet n. 3853 ?) P7 v/ p! }4 ?% v7 D3 ?: {
Page 1 (1)
# M5 B, e1 [% O/ e1 w$ D; H: MSubject:
) [% [+ Q1 ]5 m$ W7 |- @0 C& l rFlammability of materials and5 w- F9 C1 V0 ~2 a- I
components
/ e+ H& M! b. W1 b- ?5 c/ d0 l$ LKey words:& L, l7 k0 n: u5 d$ _, H) Z* ~+ c
-Fire enclosure9 r: D8 x" r3 j. d
-Flammability$ S E( g' B* j3 h9 D& p7 P
Decision confirmed
- w3 Q2 B. L! A4 S9 dat CTL 38th meeting8 q# A$ U" F, |% b: @, w% U
Question:- [( r9 ^" e( n/ e$ Y; [' Q8 A
It is allowed to add decorative parts with flammability class HB to the outside of the fire6 Z/ b+ ?7 t) W8 H+ |( T
enclosure of, for example, a computer. Consider the situation that the computer is, then,1 }' Q' E! t1 x9 K2 c
installed inside the fire enclosure of bigger equipment. According to the standard, parts
# f" ?( h& y* C' Z- w& pinside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.2# e; f4 G' z3 b
and 4.4.3.3: all materials inside a fire enclosure must be of flammability class min V-2 or1 [ r" Z7 R" R* R& r( ~& i" e0 G
HF-2. It is not clear whether the decorative HB material on the outside of the computer is- w/ ]" m- E) a1 Y
exempted from this requirement since the computer has been approved separately% F. l0 w! d- T
Decision:* a% g7 ^- E+ {; z
HB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.1 C& U* u' p2 n; M" R
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