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25 Expelled parts) h0 B3 l/ w& y+ \3 } c
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.# n0 K3 u# P$ s% I! G2 o
Compliance is checked by inspection for the presence of protective means.' x8 j! T1 K$ m: A. i) a( W
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be
' v) x" }2 w; }" uintrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the# @: s0 w$ [% x4 k/ b- P* a2 B$ r
EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
+ R/ H. }: _4 H! n/ c" E {A non-intrinsically safe tube shall be provided with an effective protective screen which cannot be+ T: C* T" w4 X% b1 u, I4 [
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
% I, y& @9 R7 q$ b! W& Awith the surface of the tube.
7 W* u3 A5 {2 e k/ ^The tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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