PDSH 957 Construction

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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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自动卷线器试验机

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各种灯头量规现货

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IEC61347/UL935镇流器热试验箱

灯具防风罩

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家电温升测试角

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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

PDSH 957

Construction

20.7.4 , ?1 l' }. Z3 y4 N; b; s, v9 t

60598-2-20(ed.3) 1 `! |! o8 L! J2 Y' E% Q& r

Standard(s):
7 m# L3 k* \  z& g; `IEC 60598-2-20/2010
3 ^- S8 ^) {1 X: B1 v9 N/ @5 m2 vSubclause(s): 20.7.4
: O; v$ \, u7 v4 rNo. Year PDSH 0957 2010
Category: LITE Developed by: ETF5 OSM/LUM
Subject:
/ k3 o' U4 H2 q% k1 |* vConstruction
Key words:
- Connections
- Rope light
0 \" ]& W8 N+ p( O8 o  |: f( \; n! O- Current carrying parts
- L4 z5 p( B" A/ S' f, K0 G2 G  fTo be approved at the 49th CTL Plenary Meeting, in 2012
Question:
2 k: v0 v' G* G8 }! AIn clause 20.7.4 of IEC 60598-2-20, it is mentioned that only 4.11.4 and 4.11.5 of clause 4.11 apply for
2 T7 W: D( p. ?  telectrical connections and current carrying parts. Sub-clause 4.11.1 (contact pressure through insulating
material) does not apply. In a rope light connecting system we often have connections with pins that are
; K& P$ G4 |# P8 mstuck axially into the bare wires after cutting the lighting tube. This is contact pressure through insulating
material. With about 16 W/m and a length until 100 m we can have a current more than 6 A at the
! N/ z6 j/ I9 z$ @, H& A$ R5 Kconnecting part. With those connections we have a high risk of fire. § 20.7.4 of IEC 60598-2-20 applies, in
# K% n4 R1 i; H' }our opinion, to the connection to the lamp only (e.g. connection to Edison lampholders with insulating
piercing terminals). Perhaps we can follow IEC 60335-1 - § 28.2 (contact pressure through insulating
# ~: O3 R3 O1 X9 B* ^1 gmaterial – 0,5 A limitation for the current). We have also informed our National Standard Committee about
5 g+ x' z+ H5 `0 t: o. u' k( s) uthe matter.
. h: A: N2 W: w( u8 s' n5 WDecision:
3 X( Y; S% V$ K3 y8 hThe connection is not acceptable due to the requirements of Section 15 of IEC 60598-1.

' x) \- L: c1 T7 v