PDSH 958 Small push in lamp Small plastic lampholder Mechanical test
http://decisions.iecee.org/icons/ecblank.gif PDSH 958
Small push in lamp Small plastic lampholder Mechanical test
20.7.6
60238(ed.5);am1;am2 & 60238(ed.6);am1;am2 & 60238(ed.7);am1;am2 & 60238(ed.8);am1;am2 & 60598-2-20(ed.3) & EN 60238: all editions
Standard(s):
IEC 60598-2-20/2010
IEC/EN 60238 All editions
Subclause(s): 20.7.6
No. Year PDSH 0958 2010
Category: LITE Developed by: ETF5 OSM/LUM
Subject:
Small push in lamp
Small plastic lampholder
Mechanical test
Key words:
- Push in lamp
- Plastic lampholder
- Mechanical test
To be approved at the 49th CTL Plenary Meeting, in 2012
Question:
We seek clarification on the correct method to perform a mechanical impact test for both mains rated
voltage, SELV and ELV lighting chains in respect of clause 20.7.6 of the above referenced standards.
The seems to be a difference between IEC and EN.
1/ IEC version standard references tests to 60238 clause 15 on three samples (push in type) clause 15.2
applies but which force?
2/ According to IEC version of the test E5 & E10 lampholder are subjected to a free fall test EN 60068-2-
75. Clause 15.6 suggests a method of test to fix the lampholder to plywood. We have made some
different tests by way of experiment in our Laboratory using the spring force impact hammer (better for
the test engineer) with the lampholder fixed against plywood and again without the
lampholder being fixed at all. We find that when the lampholder is fixed most times the plastic
lampholder cracks which can result in the live contacts becoming loose within the lampholder. What is
the correct test and lampholder support method to make according to IEC?
3/ According to EN the test is again referenced to 60238 but is modified by Annex ZB. Its says in annex
ZB the tests don’t apply to E5 but what about push in?
Decision:
1/ 15.2 is not applicable to push in type lampholder. 20.7.13 takes over.
2/ Pendulum hammer applies to E14 and larger lampholders; E5, E10 and similar small push in type
lampholders shall fulfil the tumbling barrel test.
3/ Small push in type lampholders are equalised as E5.
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