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1.2.23
- p2 q5 O6 N$ G7 k/ [4 x P, [) p2 zclass II luminaire
/ L4 D. Q+ G2 E' n# Wluminaire in which protection against electric shock does not rely on basic insulation only, but in
9 g5 Y- h: N7 K5 D' @which additional safety precautions such as double insulation or reinforced insulation are
0 X h6 @3 {; {& Q! z5 C9 M3 Mprovided, there being no provision for protective earthing or reliance upon installation
1 k& R+ V4 C \conditions.
8 R: n3 L0 C* uNOTE 1 Such a luminaire may be of one of the following types:& y* O* C7 X W6 \( g2 E4 @/ a
a) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all
0 v$ S. A, N7 X/ y2 M8 vmetal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live1 L M {5 I* E! k
parts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased2 U$ W! W2 i$ S/ X: L+ H
class II luminaire.
; A4 E7 g) T* g* K, U p2 M8 Q: p, l( mb) A luminaire having a substantially continuous enclosure of metal, in which double insulation is used throughout,
5 p; S( R6 ?+ _' Texcept for those parts where reinforced insulation is used because the application of double insulation is# J! o7 F; E8 R
manifestly impracticable. Such a luminaire is called a metal-encased class II luminaire.
: X2 `' Y/ ~4 U; V! Sc) A luminaire which is a combination of types a) and b) above.
9 e: k8 F l* [( _" H9 RNOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
4 o) \: k. V8 V; K/ {supplementary insulation or the reinforced insulation.7 s, l1 P7 `! }, Q
NOTE 3 If earthing is provided to assist starting, but is not connected to an accessible metal part, the luminaire
+ ], a2 r# H3 ^' S3 gmay still be deemed to be of class II. Accessible metal parts in compliance with the appropriate IEC lamp
' G8 l$ ~& n3 C4 @) H# fspecification and other metal parts not normally earthed and not normally accessible during normal use are not
[, H9 \# Z8 n p. J) _regarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them to be& ~$ j: p, r6 q6 x# R3 Q1 m
live parts.
' w0 ^8 i7 h7 | JNOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has an earthing terminal or an
5 K& V9 G8 x0 T7 cearthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in may have an
0 t3 f6 w5 |6 M" a, e. K% Tinternal terminal for maintaining the electrical continuity of an earthing conductor not terminating in the luminaire,! s/ @! y, L1 G) [$ c8 m/ L
provided that the terminal is insulated from accessible metal parts by class II insulation.4 ~) X# z$ e! z
NOTE 5 Class II luminaires may have parts in which protection against electric shock relies on operation at safety% \" _3 K# F% b- T
extra-low voltage (SELV).0 S. |: L, `- g w/ r( f* x, b
1.2.24
1 j+ u* { h" m" `$ t3 Mclass III luminaire! P2 D+ r2 v# f& F2 d a5 R4 w
luminaire in which protection against electric shock relies on supply at safety extra-low voltage% H" a: I, w$ B( Q& r
(SELV) and in which voltages higher than those of SELV are not generated.: ], ~3 Q! t- H( K1 a6 ^- v
NOTE A class III luminaire should not be provided with means for protective earthing. |
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