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25 Expelled parts, m6 m% b0 p. D+ Y7 N2 X' @ c
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.
; Q9 |5 r/ F$ U( J- Z7 kCompliance is checked by inspection for the presence of protective means.# N/ Z: }6 f3 u+ D7 T* _2 Q4 _9 V$ Z0 n
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be
a5 a; G# P; K d( qintrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the
( {/ X6 a" S0 ]$ {& H: YEQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
3 v5 p& K Y v0 I/ b; o7 oA non-intrinsically safe tube shall be provided with an effective protective screen which cannot be
# w3 f' G1 T |' a9 oremoved without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
, F3 ^4 G' ^5 A! a7 C& a3 ?0 ewith the surface of the tube.
: {4 w" N& L. z yThe tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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