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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
: f4 {4 D8 a$ ^$ vor have a sufficient number of layers, to withstand the electrical stresses that can be expected
8 ~9 J0 Q- Q- X) _2 d# [: w2 Kduring the use of the appliance." i7 g8 m$ B7 R' p
Compliance is checked
) P* l4 Q+ m( m– by measurement, in accordance with 29.3.1, or6 L0 @! H# t1 q) V. G0 u, E, \( F
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more+ b( k; x" M) n! l
than one separate layer, other than natural mica or similar flaky material, or' t/ s0 j k3 ?, {& b7 N2 Q& a5 y
– by an assessment of the thermal quality of the material combined with an electric strength" c, z0 ^* v* X* W: P# g- E5 w
test, in accordance with 29.3.3 and for accessible parts of reinforced insulation
3 n" g5 P9 A$ A# R8 L$ U- |# F6 vconsisting of a single layer, by measurement in accordance with 29.3.4, or |
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