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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
2 j4 _/ d7 G, Tor have a sufficient number of layers, to withstand the electrical stresses that can be expected2 g) Z5 f, I4 s* p( l# m" O0 e
during the use of the appliance.4 `( n! c; v& O& t# Z. Y# h" N7 L
Compliance is checked
$ U$ F- O8 b! \5 _- S4 t( l7 r– by measurement, in accordance with 29.3.1, or/ W$ d+ B9 ]$ }6 ?9 F( j$ [5 H
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more
, @0 S7 f4 v3 L8 s5 Cthan one separate layer, other than natural mica or similar flaky material, or7 x6 R2 v5 T( f7 n
– by an assessment of the thermal quality of the material combined with an electric strength
$ C% v+ y5 I+ Ltest, in accordance with 29.3.3 and for accessible parts of reinforced insulation8 z, ]% ?1 [' ? J. U8 _* k
consisting of a single layer, by measurement in accordance with 29.3.4, or |
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