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3.3.10
; ?/ `* [0 L7 A Q0 pclass II appliance$ }+ ]/ n7 P9 u) W% n0 S( X
appliance in which protection against electric shock does not rely on basic insulation only- u& \/ [) H6 H" G6 B. Q
but in which additional safety precautions are provided, such as double insulation or
& g. [5 ?/ r! _; Dreinforced insulation, there being no provision for protective earthing or reliance upon
; h1 m5 Y4 N8 s1 einstallation conditions
0 G8 @; ~6 `: d& t$ ?NOTE 1 Such an appliance may be of one of the following types:. Q; n. Q$ J6 n; C4 O0 ~( \. X' s- f
– an appliance having a durable and substantially continuous enclosure of insulating material which envelops all6 e* X# V# X' ]" i; X
metal parts, with the exception of parts, such as nameplates, screws and rivets, which are isolated from live
9 o% y$ L F }; ]parts by insulation at least equivalent to reinforced insulation; such an appliance is called an insulationencased
& k/ G0 K/ P; _* W; c& |* h2 d+ Uclass II appliance;! e7 D( ^9 C, H! \/ F
– an appliance having a substantially continuous metal enclosure, in which double insulation or reinforced( L! ~3 t$ h. o+ c9 p: b& {
insulation is used throughout; such an appliance is called a metal-encased class II appliance;9 _, v3 g! K8 ]3 o4 `8 S, f
– an appliance which is a combination of an insulation-encased class II appliance and a metal-encased class II
# g& u) a: a: K" ?appliance.
- B3 \+ @0 v1 r* w8 cNOTE 2 The enclosure of an insulation-encased class II appliance may form a part or the whole of the
; r% D- D' G( M" p; G' e. vsupplementary insulation or of the reinforced insulation.
/ m* w8 z) q* B4 _1 x8 LNOTE 3 If an appliance with double insulation or reinforced insulation throughout has provision for earthing, it
( k* `) M2 ~ _+ p- ^: f: w0 dis considered to be a class I appliance or a class 0I appliance. |
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