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3.3.108 J( _# B7 d% J4 q1 _6 ~6 R7 I
class II appliance+ |7 J4 l& u% h6 U/ f0 v
appliance in which protection against electric shock does not rely on basic insulation only
l7 ?- X% A3 W$ e! A5 hbut in which additional safety precautions are provided, such as double insulation or
: D h/ Z0 ^1 B& \+ wreinforced insulation, there being no provision for protective earthing or reliance upon$ R* Q" l+ j$ z" u
installation conditions. w- O$ h% l' W4 ~) T/ k7 d
NOTE 1 Such an appliance may be of one of the following types:
/ w* t7 r6 `: k: W. R( C( L– an appliance having a durable and substantially continuous enclosure of insulating material which envelops all# g. o" R: C0 w5 h4 f0 U3 T
metal parts, with the exception of parts, such as nameplates, screws and rivets, which are isolated from live
# b# E9 h A/ V+ |! U2 A- O. \ o, Xparts by insulation at least equivalent to reinforced insulation; such an appliance is called an insulationencased
, p' |! v7 e3 i& @class II appliance;' l6 h4 w$ { P- v7 ^1 \! ~" R0 r
– an appliance having a substantially continuous metal enclosure, in which double insulation or reinforced& Q1 k' k% Z; O1 ]
insulation is used throughout; such an appliance is called a metal-encased class II appliance;
- `8 K( k9 [9 @– an appliance which is a combination of an insulation-encased class II appliance and a metal-encased class II
4 v( _3 Y5 e& r7 [9 {% dappliance.
3 y& P: q. P' }# f2 ?- A9 KNOTE 2 The enclosure of an insulation-encased class II appliance may form a part or the whole of the9 s: |3 h& `0 L/ y- j
supplementary insulation or of the reinforced insulation.
* Z# |0 L9 O. o: d4 a% e7 ONOTE 3 If an appliance with double insulation or reinforced insulation throughout has provision for earthing, it/ f+ E! l1 _4 n$ n3 r* r4 q4 J
is considered to be a class I appliance or a class 0I appliance. |
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