DSH 385 Flammability of materials and components

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广东安规检测
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E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 385 : i) w4 q! }8 l( M

Flammability of materials and components 8 O, y% N$ I/ R: U- q, C4 c' w; k

4.4.3

60950(ed.2) % K2 g. a' s' a- b9 g: v. o6 A

+ G, ^% [4 F" |1 k# i8 o& X2 C2 XStandard:
& O1 O2 G1 I- bIEC60950, 2nd Edition
Sub clause:
4.4.3
9 m5 P- ?; ]0 O4 p7 f4 Z% wSheet n. 385
! N+ l7 V$ b3 q/ ?; |9 n) C/ A3 I6 EPage 1 (1)
Subject:
# \# s4 U1 W" y1 L7 m6 zFlammability of materials and
components
% u: ]# M9 q; a% q1 fKey words:
- L& k+ F3 K7 U: Y-Fire enclosure
-Flammability
Decision confirmed
at CTL 38th meeting
8 Q) C0 @, J. {' N! ?Question:
It is allowed to add decorative parts with flammability class HB to the outside of the fire
1 I7 U% A9 x. ^) [, r' C! zenclosure of, for example, a computer. Consider the situation that the computer is, then,
8 K* l" \9 j1 d- D% Ginstalled inside the fire enclosure of bigger equipment. According to the standard, parts
, G% Y. g8 |9 N( ?inside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.2
and 4.4.3.3: all materials inside a fire enclosure must be of flammability class min V-2 or
HF-2. It is not clear whether the decorative HB material on the outside of the computer is
exempted from this requirement since the computer has been approved separately
Decision:
HB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.
; O* n% U# K4 g
( {3 ~) D* ~5 m
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