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1.2.23
! _" v) ^4 y! I9 ]0 g Bclass II luminaire
, e6 r u0 M( L$ r3 T7 bluminaire in which protection against electric shock does not rely on basic insulation only, but in
# R' ~* N8 m: p* Mwhich additional safety precautions such as double insulation or reinforced insulation are$ @( U$ G: E5 C; v* M7 |- [7 v- H
provided, there being no provision for protective earthing or reliance upon installation
( J6 _/ a7 N. C, xconditions.
1 o2 E. I }) E, ~; |; LNOTE 1 Such a luminaire may be of one of the following types:
: ^8 I7 X7 \8 B) Y& w ka) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all" i6 f8 S& @. M5 Z) t, T
metal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live3 [ F) v. C9 k
parts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased0 s; c. r8 H1 j$ f( Z% R( d6 P
class II luminaire.9 \% \ O" g+ [5 V9 O
b) A luminaire having a substantially continuous enclosure of metal, in which double insulation is used throughout,
- n! C4 E' J6 ?7 m, dexcept for those parts where reinforced insulation is used because the application of double insulation is, `9 {: k7 X" n
manifestly impracticable. Such a luminaire is called a metal-encased class II luminaire. b6 }$ g. s# c3 }" z' i
c) A luminaire which is a combination of types a) and b) above.' s0 [& I8 }4 f2 ]$ H1 I6 A
NOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
4 @; a5 b, A# Ssupplementary insulation or the reinforced insulation.
0 K4 j0 z# G+ @2 g8 uNOTE 3 If earthing is provided to assist starting, but is not connected to an accessible metal part, the luminaire
8 p% _* U5 Y) t p: F1 D1 ~may still be deemed to be of class II. Accessible metal parts in compliance with the appropriate IEC lamp
4 i7 c0 L6 \- f$ g8 S2 S0 ospecification and other metal parts not normally earthed and not normally accessible during normal use are not6 W# _4 t$ @# `
regarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them to be' c! k) N+ o# d
live parts.
9 u7 y1 ]" ~ m, N# k& ZNOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has an earthing terminal or an" a: B( n6 ?3 T
earthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in may have an
/ w% o) e6 @$ {internal terminal for maintaining the electrical continuity of an earthing conductor not terminating in the luminaire,
) {' a& _+ ]& q+ eprovided that the terminal is insulated from accessible metal parts by class II insulation.
) c4 e' `, d p; lNOTE 5 Class II luminaires may have parts in which protection against electric shock relies on operation at safety8 J9 y; ]' n5 F2 e( T
extra-low voltage (SELV). |
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