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3.3.10% R) Q# e+ p+ n
class II appliance
/ o1 x+ C" a+ }. tappliance in which protection against electric shock does not rely on basic insulation only' L8 Y- }) }5 P; a7 F
but in which additional safety precautions are provided, such as double insulation or
9 x2 b+ T X/ _# [- Treinforced insulation, there being no provision for protective earthing or reliance upon
* a& H8 U9 I; ~- A( x% \installation conditions
5 n+ z7 D9 O/ m; nNOTE 1 Such an appliance may be of one of the following types:
$ ]% y( G& i& E' A* v* R% y" r) ]9 V– an appliance having a durable and substantially continuous enclosure of insulating material which envelops all
# |5 V8 p3 D. } Ometal parts, with the exception of parts, such as nameplates, screws and rivets, which are isolated from live
9 d1 M# O) b) w0 tparts by insulation at least equivalent to reinforced insulation; such an appliance is called an insulationencased6 S6 s' f( x. g
class II appliance;
9 p+ G+ Z' F7 o9 |# g; {, h– an appliance having a substantially continuous metal enclosure, in which double insulation or reinforced
1 Q3 p; f5 K, X6 [4 g) S, J7 kinsulation is used throughout; such an appliance is called a metal-encased class II appliance;5 ~( G7 D0 d% l' E8 z/ C1 f
– an appliance which is a combination of an insulation-encased class II appliance and a metal-encased class II) a4 l6 q3 b$ q9 n5 `
appliance.
! e7 a: s7 z; ANOTE 2 The enclosure of an insulation-encased class II appliance may form a part or the whole of the0 }5 q% t ? u1 A, i$ |
supplementary insulation or of the reinforced insulation.; Y4 ^) ?2 B% ^
NOTE 3 If an appliance with double insulation or reinforced insulation throughout has provision for earthing, it1 V" i1 T8 t) P$ |7 B1 f
is considered to be a class I appliance or a class 0I appliance. |
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