DSH 385 Flammability of materials and components

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广东安规检测
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小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

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水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

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灯具防风罩

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家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

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 : t' H9 w$ a, C1 c1 c. Z: x ; T! b3 ]& C! a

Flammability of materials and components 4 A" H' m3 c, z* w7 ^& W" r$ s

4.4.3

60950(ed.2) 3 j" s  w. L& P2 R

8 l+ Y% P/ w4 L8 M8 k. m1 c; d+ IStandard:
7 F) q& ^) m- S. v4 k* q5 mIEC60950, 2nd Edition
% ?5 L# i  Q3 e/ SSub clause:
4.4.3
' W' Q% O/ j0 ^Sheet n. 385
% n. V6 b/ o9 S1 M) Y) nPage 1 (1)
Subject:
Flammability of materials and
" L  J4 ^* _6 l5 W( ycomponents
* }' s: I0 a, I8 R; v- L4 gKey words:
0 E# {% u+ j: X. v2 u1 f-Fire enclosure
-Flammability
9 b, Z. ~4 ]; v: D, K3 W' Z: \) eDecision confirmed
at CTL 38th meeting
Question:
It is allowed to add decorative parts with flammability class HB to the outside of the fire
enclosure of, for example, a computer. Consider the situation that the computer is, then,
  K0 Z6 D( a( w2 R% F7 A/ {installed inside the fire enclosure of bigger equipment. According to the standard, parts
inside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.2
0 p  p: K7 ~/ R0 F$ M3 \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
& h& J% _% N# eexempted from this requirement since the computer has been approved separately
! j2 K/ H! b. y4 t5 wDecision:
HB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.
( B3 S4 k8 [. [( E' n

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