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CTL DSH 928 Question:2 O5 C2 f. v% v" M9 Z
1) External parts of insulating material providing protection against electric shock or parts of9 g( c& o2 }9 G Z# m& y
insulating material retaining current-carrying parts or SELV parts in position shall be subjected to
! b$ f m+ s0 \& [8 f. }+ Y' q2 [+ Fthe ball pressure test. Is the ball pressure test to be applied to soft thermoplastic parts which
: k+ F3 s+ A2 E7 Aprovide reinforced insulation? If so, it would mean that soft thermoplastic material could never be
x e: b& }- N* M/ Xused, because on this type of material the diameter of the ball impression always exceed 2 mm?8 E6 L3 i$ e1 T/ G& Y
2) Is the test applied on connectors moulded on cable or end cap used as reinforced insulation of
- o3 e( i! a- E# U( plighting chain like sealed tube and on connectors which retain SELV parts of class III lighting# ?. O! o% i; S P
chain?
4 Q0 m2 ?7 x$ L2 q5 e( SDecision:8 M3 P" U3 f, |- }
1) If the results of the ball pressure tests do not comply with the requirement of the standard, soft
4 O2 s/ A. f6 n! ^6 _thermoplastic materials shall not be used as reinforced insulation.9 S1 b! d8 B% ?+ c( I' i1 x8 R* x
2) Yes. |
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