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CTL DSH 928 Question:
/ S, r; F/ y% e8 Z1) External parts of insulating material providing protection against electric shock or parts of
, s8 N4 S6 R, J$ [: u0 x8 c$ Yinsulating material retaining current-carrying parts or SELV parts in position shall be subjected to
; q# }" e- a% x# x8 x8 }the ball pressure test. Is the ball pressure test to be applied to soft thermoplastic parts which
: I5 Y! I4 _, T8 x& Q Pprovide reinforced insulation? If so, it would mean that soft thermoplastic material could never be! ]) d1 a8 I9 q3 f2 q
used, because on this type of material the diameter of the ball impression always exceed 2 mm?
. B8 x. w) ?; Y0 ^4 A2) Is the test applied on connectors moulded on cable or end cap used as reinforced insulation of
9 V0 d, A( S8 ]+ E; Mlighting chain like sealed tube and on connectors which retain SELV parts of class III lighting
2 G* w L& a' R' \* k! A3 H$ Nchain?
, f* C M5 z! l) q6 T( K% jDecision:
' K) a9 f+ Y( z* ?2 P; W+ ^. H1) If the results of the ball pressure tests do not comply with the requirement of the standard, soft u9 h5 E e6 t7 L
thermoplastic materials shall not be used as reinforced insulation.4 q/ G2 X) x# k1 {/ {0 v. v
2) Yes. |
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