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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
& m' E' l$ o1 f- k8 Jor have a sufficient number of layers, to withstand the electrical stresses that can be expected9 f6 z, S7 u4 x6 A1 N/ @/ B b1 @
during the use of the appliance.9 y& F6 P. Y+ U( J/ [3 q; H8 R
Compliance is checked3 Q2 E' z. O, m. S) A& G7 U7 S
– by measurement, in accordance with 29.3.1, or% M: i5 P( Q( t, o! b8 l1 h$ H
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more' [' E4 a0 W& b0 {! _$ K6 K0 E3 s
than one separate layer, other than natural mica or similar flaky material, or
. O! F: p$ Z, N+ @– by an assessment of the thermal quality of the material combined with an electric strength
* g0 r7 W7 u" T$ j1 v0 x# ?test, in accordance with 29.3.3 and for accessible parts of reinforced insulation8 F: h6 Q: s' x9 C/ Q/ v
consisting of a single layer, by measurement in accordance with 29.3.4, or |
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