DSH 741 Insulation of handles

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

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 741 7 g% M3 S* o8 ~) v: x7 `* z

Insulation of handles 2 M( r& J1 ]/ u" z' l! ?# N8 v) s

22.35 8 O! x& m6 b2 K* M* J: |

60335-1(ed.4)

2 _( @; u  \! |  e2 z, O. hQuestion:
8 w! t/ K, Z/ u* tFor a portable appliance, metal handles that are likely to become live in the event of a failure of basic insulation are required to be covered by insulating material or separated from their shafts or fixings by supplementary insulation.
For a construction as shown in the attached drawing; where live parts of the tubular sheathed heating element are separated from metal parts by basic insulation; and the metal sheath is connected to protective earth in accordance with clause 27; is the metal
9 g. C8 L( T' |1 K0 v, Bhandle deemed likely to become live in the event of basic insulation failure of the heating element and therefore the handle requires additional supplementary insulation? (the metal handle is conductively connected to the metal heating element sheath)
Decision:
% `: q: k1 Z, z+ e( `3 N$ a& qYes, the handle requires additional supplementary insulation.