PDSH 897 Live metal parts projected from Edison screw caps

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PDSH 897 , B2 ]( ?/ p8 S! Q- ?+ h' a4 [. e

Live metal parts projected from Edison screw caps

8.2.1

60598-1(ed.3);am1 & 60598-1(ed.4);am1 & 60598-1(ed.5) & 60598-1(ed.6);am1 & 60598-1(ed.7)

0 Z; Y3 X  r# y# |! JStandard(s):
4 ?+ E; q* Q0 D1 d+ D8 X% vIEC 60598-1 All editions
: g0 j  \, Z6 Z' ?; FSubclause(s): 8.2.1
No. Year DSH 0897 2010
% d6 H6 e3 @6 u/ T/ b1 fCategory: LITE Developed by: ETF5 OSM/LUM
% J( K, N9 t: _; {Subject:
Live metal parts projected from Edison screw caps
Key words:
# [0 a9 ^# P/ V. b9 L- Protection against electric shock
7 p3 c8 |; F7 w8 g- Live metal parts
8 m. g0 L5 S9 Z$ b$ z. f- Standard test finger
8 }  U4 q4 K3 P& K- A; ~( }Approved at the 49th CTL Plenary Meeting, in 2012
% W, f" h# B1 U6 m7 IQuestion:
, E6 W; t$ L( yDuring the test of protection against electric shock for luminaires, in some cases a live metal part
projected from lamp cap E 27 can be accessible with the standard test finger. When the compliance of the
) `2 M3 m9 x" m; O" ?8 Y' Xused lamp and the built-in lampholder were checked with the relevant requirements of IEC 60432-1
& J/ t  p( Y# k+ i1 v2 pand IEC 60238, they were found as satisfied. But the live part accessibility within the luminaire was
caused by such a metal part projected from the lamp cap which is acceptable according to the sub clause
) X+ v1 \8 Y( @6 E# G2.7.3 of IEC 60432-1. “On Edison screw caps any projection from the cap shell shall not project more
than 3 mm from the surface of the cap. See figure 1”. In this case there can easily come into existence a
cap and holder combination where the protection against electric shock cannot be maintained within the
  ]- p# u5 C3 c5 |luminaire.
. l, N5 C4 h8 hCan this luminaire construction be accepted?
$ s" a2 U  Y2 i' }' ]Decision:
Yes, the lampholder and the lamp shall comply with their gauges specified in IEC Publication 60061(for
further information, see 60061-4, Sheet 7007-20-1).
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