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|  DSH 3855 g5 b( U6 [, [! R
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| Flammability of materials and components1 d' M3 P4 O& m- r: N5 q
| 4.4.3- B2 Y8 J3 F1 }6 R; B
| 60950(ed.2)
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Standard:
l0 |( ~* Z# `3 T9 v. ]* ?( x7 TIEC60950, 2nd Edition
5 ~* C2 v& D( aSub clause:
# U( v$ s* K/ v3 P Y, c4.4.3
' F! u) P6 [" n. n2 m1 ~2 LSheet n. 385
& _4 z3 A f1 Q# uPage 1 (1)0 j9 G& a% j% ?" M7 Z
Subject:/ N- ~) O+ u$ v9 i7 E8 g" y x
Flammability of materials and: Z) b3 Z, a& s
components
1 R3 I F, U6 z( q r+ SKey words:
3 W8 U9 ~2 O% d5 [' R2 U" T-Fire enclosure
; U6 o# _2 v- w7 a @# i: V5 }-Flammability
5 X9 v- `4 \1 B! F9 @# T( ]9 e& ?Decision confirmed$ @& `7 C; c. W4 `- k( o
at CTL 38th meeting" Y3 A' }7 J8 |; J+ v2 ?1 N/ @
Question:+ f: `; `# ^6 q' }
It is allowed to add decorative parts with flammability class HB to the outside of the fire0 v% i- O1 L/ W8 c# _8 T
enclosure of, for example, a computer. Consider the situation that the computer is, then,- @. z5 ], U& k: F& w' P
installed inside the fire enclosure of bigger equipment. According to the standard, parts$ d, S% n- M+ r) S. y; Z4 _$ O3 n
inside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.2 G! Q# Q3 l! Y2 e8 n
and 4.4.3.3: all materials inside a fire enclosure must be of flammability class min V-2 or
, _" X5 C% I* SHF-2. It is not clear whether the decorative HB material on the outside of the computer is
- @7 Q5 O1 h, A' }7 ]& y5 mexempted from this requirement since the computer has been approved separately% P' b8 G* U5 A+ m3 T+ n* s) {! w
Decision:
) X$ Q, i2 h# b9 ]* I C1 Q: g9 eHB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.4 y0 p1 n- @2 j( I/ i5 A8 c
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发表于 2012-11-6 17:25
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