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1.2.23
: I3 E6 w2 @( }! @% rclass II luminaire2 S' A# J( Q2 r6 z+ r
luminaire in which protection against electric shock does not rely on basic insulation only, but in
$ C+ ?8 t4 @( E' t4 v/ iwhich additional safety precautions such as double insulation or reinforced insulation are
. M8 O( P; Z+ e/ j! h D' tprovided, there being no provision for protective earthing or reliance upon installation
; S3 U2 T1 x: ~conditions.
: v* n5 K" R7 |4 x/ o" {NOTE 1 Such a luminaire may be of one of the following types:
2 o) X% M$ q& ja) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all5 o, B8 Q, G+ O9 w, l
metal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live5 W2 p; {! W- u7 d6 ~" O/ N( k
parts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased
! |" H* E9 Y; ]! J; T, `' R" P! ]# _1 oclass II luminaire.
3 a" V; x) t) j1 I; c) _# Fb) A luminaire having a substantially continuous enclosure of metal, in which double insulation is used throughout, @8 ^% s" b6 K4 j9 {% I9 {5 ~
except for those parts where reinforced insulation is used because the application of double insulation is
{. u& K' |, R7 gmanifestly impracticable. Such a luminaire is called a metal-encased class II luminaire.
; l: N1 i4 ]1 _% |& gc) A luminaire which is a combination of types a) and b) above.
! X+ }- e% b8 P' A" `( LNOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
8 y- ~) z) I- f; @supplementary insulation or the reinforced insulation.3 n! N/ P$ W0 B+ N
NOTE 3 If earthing is provided to assist starting, but is not connected to an accessible metal part, the luminaire- K' I$ I( Q& M
may still be deemed to be of class II. Accessible metal parts in compliance with the appropriate IEC lamp8 H( u* t, x* G& S B( r
specification and other metal parts not normally earthed and not normally accessible during normal use are not
# ]% e; a, i! _1 Q j+ z# vregarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them to be
" r L% ?2 p" \' d+ ilive parts.* Y9 `4 Q8 M; m
NOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has an earthing terminal or an) V7 x' @( }' M) S. }) K
earthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in may have an+ R& j% K ?, w6 r
internal terminal for maintaining the electrical continuity of an earthing conductor not terminating in the luminaire,! \+ N9 L5 S7 r
provided that the terminal is insulated from accessible metal parts by class II insulation.
& s; o; f3 U$ `) u* Q$ Z1 \5 _8 HNOTE 5 Class II luminaires may have parts in which protection against electric shock relies on operation at safety. H$ \' Z0 d) e* B$ V" w
extra-low voltage (SELV).
+ l" n; H& j( c1.2.24 X$ `) C" {! _0 n/ c) a2 ]- a
class III luminaire% j; f, g8 @ ~0 \1 u
luminaire in which protection against electric shock relies on supply at safety extra-low voltage
5 v) `( A$ U7 B9 O: ]( r5 A% s; t, l(SELV) and in which voltages higher than those of SELV are not generated.5 l5 l! ~+ L ]
NOTE A class III luminaire should not be provided with means for protective earthing. |
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