PDSH 897 Live metal parts projected from Edison screw caps

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PDSH 897 7 X# j* f5 k, T2 ]

Live metal parts projected from Edison screw caps

8.2.1 2 X& M. X  G4 B4 D

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

Standard(s):
IEC 60598-1 All editions
Subclause(s): 8.2.1
No. Year DSH 0897 2010
0 m; E: n- B; \6 MCategory: LITE Developed by: ETF5 OSM/LUM
; ~: H! e9 s; R% K& n) `! J! zSubject:
; S+ c- {2 G/ B0 SLive metal parts projected from Edison screw caps
4 l' h0 R$ S: _, K5 p) rKey words:
" Z; g0 _) t( R: z" R9 w- Protection against electric shock
- Live metal parts
0 P- r. a5 R" {0 U- Standard test finger
0 r8 O6 q+ z2 e" `/ _7 |, N( D; K$ {* qApproved at the 49th CTL Plenary Meeting, in 2012
* y2 B/ R( _, k) q7 b1 F! eQuestion:
During 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
used lamp and the built-in lampholder were checked with the relevant requirements of IEC 60432-1
& s9 O+ Q) D) i0 A* Iand 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
3 h; W  V4 _  L1 k7 p2.7.3 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
luminaire.
! o( ~* g0 }1 ]. }3 K8 P& lCan this luminaire construction be accepted?
1 u- Q$ A2 p# u4 C5 H; _( bDecision:
Yes, the lampholder and the lamp shall comply with their gauges specified in IEC Publication 60061(for
) z8 [( k- d8 D9 Q: y2 {8 zfurther information, see 60061-4, Sheet 7007-20-1).
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