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25 Expelled parts6 z+ S# `0 w, J5 z+ ]' {- G! U
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.6 `+ T& y; G1 \- o# ^
Compliance is checked by inspection for the presence of protective means.; B. d6 F3 d4 a
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be0 \- J7 K, G1 \
intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the
$ _1 }( H$ J3 j. {( c. b8 E4 HEQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
7 D: M) S4 N6 W. @$ o, GA non-intrinsically safe tube shall be provided with an effective protective screen which cannot be
% E7 K- P# w P+ nremoved without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
1 r( q& I$ [3 Hwith the surface of the tube.
) G# n' ^, u) b8 \# E3 {9 sThe tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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