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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,9 M4 u, B9 y3 E* ]7 z
or have a sufficient number of layers, to withstand the electrical stresses that can be expected0 g& h" P6 }' V( H5 v* {
during the use of the appliance.; v& Z; W! n9 F a( E3 ~% d# k7 ]
Compliance is checked- q# p& s+ J& Z7 k3 y6 W
– by measurement, in accordance with 29.3.1, or7 A" s B% l2 p! q% D
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more
l, |7 {2 b! m7 ^/ A) jthan one separate layer, other than natural mica or similar flaky material, or' Q# e d+ e0 \- _5 S
– by an assessment of the thermal quality of the material combined with an electric strength, A% \& \* G9 v% `7 z
test, in accordance with 29.3.3 and for accessible parts of reinforced insulation
& _. _' A2 L$ k# gconsisting of a single layer, by measurement in accordance with 29.3.4, or |
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