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1.2.23
# H) _ W8 Z+ ]- s. r: hclass II luminaire
: D$ z- X; o* t# U$ C v2 }6 x; mluminaire in which protection against electric shock does not rely on basic insulation only, but in
/ _& A1 Z8 r5 b. p, |+ ^which additional safety precautions such as double insulation or reinforced insulation are: D; A; B8 E( Q) b Z
provided, there being no provision for protective earthing or reliance upon installation v9 z3 R, b, g8 f/ o( k
conditions.
$ y) E" h4 ?1 rNOTE 1 Such a luminaire may be of one of the following types:7 j. X, p6 Y) J
a) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all: Q% D3 v9 J9 I. K; p
metal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live
" I+ y& N+ X/ B+ S! t( `parts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased
% \& P" P! `% b- Eclass II luminaire.
! S& I* \0 o, S+ t8 [, Kb) A luminaire having a substantially continuous enclosure of metal, in which double insulation is used throughout,
5 o9 G/ K1 F1 Z7 a% G& l. h9 Nexcept for those parts where reinforced insulation is used because the application of double insulation is
3 p$ [0 C4 z. D0 G' H6 o7 Dmanifestly impracticable. Such a luminaire is called a metal-encased class II luminaire.
" ]1 f6 X% F" u1 [: Xc) A luminaire which is a combination of types a) and b) above.$ d1 l' ~2 |9 q& O+ `
NOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
3 {; e% R+ H4 z5 i7 D+ |supplementary insulation or the reinforced insulation.
! Z0 b7 d+ `$ y3 aNOTE 3 If earthing is provided to assist starting, but is not connected to an accessible metal part, the luminaire6 s- n! s8 x [& V$ R* K& ?6 D& h
may still be deemed to be of class II. Accessible metal parts in compliance with the appropriate IEC lamp
2 i& y1 A# M& Z$ i6 [* X Hspecification and other metal parts not normally earthed and not normally accessible during normal use are not/ n. r- g9 ^2 O
regarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them to be
+ T2 a: b" v H' x# y: j: R- i1 ilive parts.
+ R8 E1 |5 c- G* P6 @" U& ~. ]NOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has an earthing terminal or an* l. G7 G; T3 L K
earthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in may have an
/ h2 L0 {& k1 hinternal terminal for maintaining the electrical continuity of an earthing conductor not terminating in the luminaire,
: W- \ f, C1 ~7 T1 Kprovided that the terminal is insulated from accessible metal parts by class II insulation.
, v7 D t; K0 b# }6 T+ jNOTE 5 Class II luminaires may have parts in which protection against electric shock relies on operation at safety! b. `+ ^$ G2 ^5 X8 x- s* O5 B9 z
extra-low voltage (SELV). |
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