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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
: }4 L& G, o! y7 ^3 p0 cor have a sufficient number of layers, to withstand the electrical stresses that can be expected
$ T |* s& _4 y. V2 r0 v' Hduring the use of the appliance.# M# E2 O( S& l) ^ h1 p5 f
Compliance is checked0 I* G$ D* G0 I. g, y
– by measurement, in accordance with 29.3.1, or) A. t; D, ?1 e/ g8 o1 a: g
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more9 N% }& p0 C7 j" V6 O8 p0 @
than one separate layer, other than natural mica or similar flaky material, or
h, | m6 H" J9 P/ p! J- e" X3 \– by an assessment of the thermal quality of the material combined with an electric strength
3 R4 B3 b3 w4 L- h# ]/ ntest, in accordance with 29.3.3 and for accessible parts of reinforced insulation6 e2 G# O: w6 E
consisting of a single layer, by measurement in accordance with 29.3.4, or |
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