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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
5 {; M2 R; G/ s, K% S/ \; {5 Uor have a sufficient number of layers, to withstand the electrical stresses that can be expected
6 g' k4 ^$ X$ \: _( S4 @during the use of the appliance.. r. C; ^9 \9 l3 }
Compliance is checked
6 M8 |1 D+ q$ i& h( e– by measurement, in accordance with 29.3.1, or- j0 M& a; x! V8 q- Y
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more
* a* ]( `* y' j2 L; gthan one separate layer, other than natural mica or similar flaky material, or, g0 z2 W& _9 ]7 e8 t
– by an assessment of the thermal quality of the material combined with an electric strength, X8 [( E A2 Y A* P! X! w i
test, in accordance with 29.3.3 and for accessible parts of reinforced insulation7 b4 p" A8 a6 H( {2 e r4 ^, Z
consisting of a single layer, by measurement in accordance with 29.3.4, or |
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