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1.2.23
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class II luminaire
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# l: z Z! h$ u$ e$ [) h: zluminaire in which protection against electric shock does not rely on basic insulation only, but in
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which additional safety precautions such as double insulation or reinforced insulation are
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0 W, }5 f+ Z+ e4 B! L' O$ Cprovided, there being no provision for protective earthing or reliance upon installation. B6 i+ q1 {3 p; j. V, X
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NOTE 1 Such a luminaire may be of one of the following types:
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3 x+ ]+ U+ L8 D3 r0 `! D! U2 Ba) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all9 s( A9 h. n: {
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metal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live! f% E' t5 s3 a; Z! l) t$ C! u! \3 p7 m
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parts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased
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class II luminaire.+ ?3 }# K3 X) |" K" |1 D& v
( r v$ E; V9 L% R% X) jb) A luminaire having a substantially continuous enclosure of metal, insulated from live parts by insulation at least
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7 R" n. p" L: q# b, A Mequivalent to double or reinforced insulation. Such a luminaire is called a metal-encased class II luminaire.6 `9 g+ X+ p5 k/ x! @2 |) H
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c) A luminaire which is a combination of types a) and b) above.1 u. X3 u7 `3 t3 i: V
4 I, |/ c/ u, lNOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
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z" Q$ m3 e# L/ ssupplementary insulation or the reinforced insulation.
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NOTE 3 If earthing is provided to assist starting, or for EMC reasons, but is not connected to an accessible metal
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part, the luminaire may still be deemed to be of class II. Accessible metal parts in compliance with the appropriate
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IEC lamp specification and other metal parts not normally earthed and not normally accessible during normal use
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7 t' A1 `/ d0 F4 E ?. Bare not regarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them6 K7 U- P3 R( p' W# i5 h) ]
& O: ~! M3 w+ f% E3 D5 K0 E% Z* sto be live parts.4 D8 F; p8 b7 B$ k
; h; ^" O7 v, U& q8 v) k3 o$ @+ mNOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has a safety earthing terminal
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or a safety earthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in or/ |( @8 D& M8 J( p
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provided with through wiring may have an internal terminal or contact for maintaining the electrical continuity of an
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earthing conductor not terminating in the luminaire, provided that the terminal is insulated from accessible metal
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9 Q4 Y. z A2 C3 X4 ~7 D! _parts by class II insulation.. l$ b' ]2 J! E4 I0 @6 o- \
* e4 D/ j7 y/ s( \8 g以上摘录自IEC60598-1:2008,Page 21。
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但是,不管是 class I construction还是是Class II construction,都没有标准定义,请更多地参考其他标准。 |
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