PDSH 898 Live metal parts projected from Edison screw caps

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广东安规检测
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PDSH 898

Live metal parts projected from Edison screw caps

8.2.1   _/ ~+ Z2 M) e/ U3 D0 F* v) f

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

! ]. p6 M' x, u4 S" T1 L) cStandard(s):
IEC 60598-1
IEC 60400 All editions
" l) @" s! u" l4 }* F6 c0 OSubclause(s): 8.2.1 8.2
( m) S4 @1 Z- a, ZStandard Sheet 7005-56-2
No. Year DSH 0898 2010
Category: LITE Developed by: ETF5 OSM/LUM
( a0 W/ ~* q, D: }# j' RSubject:
G10q – connector’s construction
  A8 n6 Q* @: b: [- y( L" Y8 E( W/ R8 zKey words:
# i/ N* J0 c5 ]6 X  i- G10q lampholder
4 B2 _6 L, o+ e, ]: x4 J/ q6 t- Connector’s construction
9 Q9 @9 W# W) i7 H- b; ]' L- Protection against electric shock
Approved at the 49th CTL Plenary Meeting, in 2012
Question:
In Standard Sheet 7005-56-2, the dimension “L” is solely for holder design and is not to be gauged. If the
G10q connector is provided according to the Figures 2, “without L(1) and without L(2)”, do you think that
& V; a6 [! Y! [1 L8 p( d, t. z- Jthis construction is in conformity with IEC 60400 and IEC 60598-1?
3 s4 p2 I. t( Z3 u" S. yDecision:
3 ?3 M- H- x% j  @2 [/ z+ r! MYes, for the following reasons: in Standard Sheet 7005-56-2, the dimension “L” is indicated with the
minimum value only, the maximum value could be infinite; it is not specified how long the lampholder
3 v6 }  Z, j$ F' kpart should be delimited by “L” dimension, it could be 0 mm; clause 8.2 of IEC 60400 – “The insertion of
& s$ m. t+ q) monly one pin of the lamp (…..) or starter to the first point of contact shall be prevented. This requirement
* b& G" {% G# g1 u8 m, h. Zis not applicable to G10q holders”. This construction without additional protection around the connector is
% l4 l7 M4 J) {& @. R( n- m7 p0 ?acceptable.
! ~9 Q% U9 H5 r! y: q4 T) YThe reason for accepting the first point of contact is based on the fact that this fit was developed before
the development of IEC 60061 and IEC 60400, consequently, this fit does not follow the normal rules for
accessibility to live parts. This should be regarded as a “historic” fit having a good record of safety in
  F5 [, ]7 I& M& p  m* y' mservice over many years.




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