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|  DSH 385 y" u2 S0 K$ U: z5 A# I
6 A" I5 M0 r+ P1 a" e& u0 Q& G4 a
- m7 n8 N8 w) B3 n/ f- @ | Flammability of materials and components6 Q! u7 M: v* v# a2 p
| 4.4.38 p% `. W0 ]) g" e& F
| 60950(ed.2)! T1 X5 X$ }! R# L9 H
|
* g$ C; r: \& C, ?: KStandard:* X6 m* F4 O& A$ ^# Q" j4 {; H2 x
IEC60950, 2nd Edition
! T* G# Y2 D7 `7 s/ X! `: B+ a: vSub clause:: @) r# h5 a/ q- B- g
4.4.35 t- v/ |/ x4 a- B4 l% F
Sheet n. 385
# c$ J* F4 \3 f7 T6 bPage 1 (1)
6 x2 p! o( X( Q; K2 USubject:
, [; A3 T- ]% O" Y8 w( \Flammability of materials and
6 v/ ]2 ^+ B2 Z8 J0 b. I0 wcomponents. x& {9 G, o" |4 p J7 [9 D
Key words:- H5 q) B T6 y
-Fire enclosure
. S* u( n0 ?0 L2 |- C# Z" q# r7 \-Flammability7 m8 d* g* K; @/ ~0 Q. {$ q
Decision confirmed
+ u! U% x. @, x7 ?7 e" ]+ Eat CTL 38th meeting
! d6 F) S$ W6 |, t7 iQuestion:
. @3 u; U/ f' a! kIt is allowed to add decorative parts with flammability class HB to the outside of the fire) W1 Q5 f. f1 J
enclosure of, for example, a computer. Consider the situation that the computer is, then,. m# Q) a. e) o( _& H+ T5 g
installed inside the fire enclosure of bigger equipment. According to the standard, parts
# t5 C, ^& R' U: |inside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.21 t* Y+ h3 J9 |! Z( B2 K
and 4.4.3.3: all materials inside a fire enclosure must be of flammability class min V-2 or" x8 o& B/ o, }) N1 C
HF-2. It is not clear whether the decorative HB material on the outside of the computer is c/ [0 D: \2 T
exempted from this requirement since the computer has been approved separately& Z7 R6 s8 ~0 B
Decision:
! l1 m+ i) R$ P c! Y/ h9 X n1 [HB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.) b) U0 G9 N$ H* S1 R2 b9 ~
2 M: G6 e5 u; n6 e9 H
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