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1.2.23
3 t' u9 g# ]$ ^7 U d. _3 n: |class II luminaire
& s- l6 r# c* `. e+ `luminaire in which protection against electric shock does not rely on basic insulation only, but in1 O# B% s9 J' F. l, | ^) o
which additional safety precautions such as double insulation or reinforced insulation are( K M6 V, P6 x. g9 M. Z r
provided, there being no provision for protective earthing or reliance upon installation
. u4 }$ l1 ~3 d, u$ l% N( ^7 Lconditions.
+ w' E7 z( P$ T$ q& tNOTE 1 Such a luminaire may be of one of the following types:
* }( X5 H5 ? ma) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all9 A* X: [9 n( Z9 L: {% T) o8 R. S
metal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live
& [. j1 Z/ ^3 z; Q% qparts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased) w6 C2 h# q. c; o% J$ M! V
class II luminaire.
- a& i9 i6 e' J" u" Z W2 a, p% Pb) A luminaire having a substantially continuous enclosure of metal, in which double insulation is used throughout,
; w' K% ]. H5 k+ s, b7 Yexcept for those parts where reinforced insulation is used because the application of double insulation is
1 H: c1 X% h% v$ z, pmanifestly impracticable. Such a luminaire is called a metal-encased class II luminaire.
$ M) b( F! n7 [( `9 X' `c) A luminaire which is a combination of types a) and b) above.4 a/ M/ k0 e* ]$ y: x5 a- }
NOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
2 M9 t- t+ G9 U& E. bsupplementary insulation or the reinforced insulation.
# N; X7 A6 U0 p, C3 X- b7 _6 INOTE 3 If earthing is provided to assist starting, but is not connected to an accessible metal part, the luminaire
5 ^6 ^* @+ [5 R! o% Omay still be deemed to be of class II. Accessible metal parts in compliance with the appropriate IEC lamp
4 C" ^. {5 S& \* V7 rspecification and other metal parts not normally earthed and not normally accessible during normal use are not
4 {. M9 j1 N4 ?' V- d. w1 tregarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them to be
, u) O* K I+ y% @! h: ]! slive parts.9 ]6 X; O. t4 q
NOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has an earthing terminal or an
1 S: f, L7 S- o8 Cearthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in may have an
# {! p5 v8 Q6 x/ z$ n m4 Binternal terminal for maintaining the electrical continuity of an earthing conductor not terminating in the luminaire,3 _$ @+ D2 j/ Q
provided that the terminal is insulated from accessible metal parts by class II insulation.
, e$ m0 E! C6 L) K7 aNOTE 5 Class II luminaires may have parts in which protection against electric shock relies on operation at safety4 Q' z$ y# p" j% \9 m; m) f* B/ a
extra-low voltage (SELV). |
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