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CTL DSH 928 Question:9 k ?$ N F2 M; G/ {0 k# z, ^
1) External parts of insulating material providing protection against electric shock or parts of+ o5 S* u0 e" n) E1 Y
insulating material retaining current-carrying parts or SELV parts in position shall be subjected to
/ Q" Q, M8 O( P# Cthe ball pressure test. Is the ball pressure test to be applied to soft thermoplastic parts which% W3 z/ B! p3 n# n
provide reinforced insulation? If so, it would mean that soft thermoplastic material could never be$ @ I! Z h0 Q4 J6 `$ _ M
used, because on this type of material the diameter of the ball impression always exceed 2 mm?$ l Q* r2 L: @3 M
2) Is the test applied on connectors moulded on cable or end cap used as reinforced insulation of
) e8 i4 k0 U3 K7 Z) Q- r7 elighting chain like sealed tube and on connectors which retain SELV parts of class III lighting
/ v1 e: y T2 ^2 ~ }* dchain?
! ^# S4 c1 L2 P+ o5 @Decision:
$ d7 e: y/ ?/ \( W0 B1) If the results of the ball pressure tests do not comply with the requirement of the standard, soft
! t7 g' }) u. N, Uthermoplastic materials shall not be used as reinforced insulation.
8 R0 Q) m: R9 x2) Yes. |
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