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3.3.104 x1 B4 U' Z; c. q
class II appliance5 ^! i/ q( `1 P/ _
appliance in which protection against electric shock does not rely on basic insulation only, \7 Z5 l, f- ? j# j7 J/ K
but in which additional safety precautions are provided, such as double insulation or
! |& |1 d" `( m8 E" Z0 M, J0 mreinforced insulation, there being no provision for protective earthing or reliance upon2 ]2 @ T" V0 u7 E8 v% k
installation conditions
/ [2 c; p$ k( O4 I: h; m# dNOTE 1 Such an appliance may be of one of the following types:
8 O( R0 ~) b! m. u– an appliance having a durable and substantially continuous enclosure of insulating material which envelops all
: d8 |0 f! N/ M; umetal parts, with the exception of parts, such as nameplates, screws and rivets, which are isolated from live
& p) f$ k: G( }( s ]5 Qparts by insulation at least equivalent to reinforced insulation; such an appliance is called an insulationencased
}& L6 S# G" S3 c6 C: Eclass II appliance; a8 a3 M: s* d2 {
– an appliance having a substantially continuous metal enclosure, in which double insulation or reinforced
0 O/ ]8 J6 X' ]9 I2 b7 r6 ^insulation is used throughout; such an appliance is called a metal-encased class II appliance;- N* ?7 R0 a* q5 ?
– an appliance which is a combination of an insulation-encased class II appliance and a metal-encased class II
; l2 \1 {' z5 h5 C4 qappliance.
; _! } {! i$ h& L) dNOTE 2 The enclosure of an insulation-encased class II appliance may form a part or the whole of the: p: c7 {5 a* ~% V3 L- W( e
supplementary insulation or of the reinforced insulation.
6 ^3 ]+ [& b# O3 t2 bNOTE 3 If an appliance with double insulation or reinforced insulation throughout has provision for earthing, it
) ^1 }. \9 O/ o1 q ais considered to be a class I appliance or a class 0I appliance. |
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