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25 Expelled parts" [ c3 _: j4 S+ E+ M% u
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.2 ^5 L" A, }* v
Compliance is checked by inspection for the presence of protective means.; ^' b. l% Q2 K3 @9 Q2 \( k
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be
* P% m% q* L# w4 k+ {! e3 Qintrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the; i. J' V* h" ]. S/ s) l* k/ D3 N- U
EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
6 { R7 f, a% g8 t* |6 t% ZA non-intrinsically safe tube shall be provided with an effective protective screen which cannot be/ b& Y4 ~; H+ k- z: P1 G+ h
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
7 [; ?2 C) e7 Dwith the surface of the tube.
9 n' }& e& j3 \9 `+ ]The tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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