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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,9 @, G" H' T3 q+ F" a5 V. H" \
or have a sufficient number of layers, to withstand the electrical stresses that can be expected) A- @9 l: Q+ K. R0 y6 G3 U
during the use of the appliance.% e4 M* Y* L5 f+ p: g8 d
Compliance is checked7 C2 F% U, A, }' B- o! E$ C" g
– by measurement, in accordance with 29.3.1, or) a1 i2 }3 v) N& `/ ^: i
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more. }' Q8 p. t" [ G0 B
than one separate layer, other than natural mica or similar flaky material, or
% Q8 }; h. @7 |0 e– by an assessment of the thermal quality of the material combined with an electric strength
( V& n1 ^+ b1 e' z3 n' f. etest, in accordance with 29.3.3 and for accessible parts of reinforced insulation$ P; A9 d7 t9 u* k; y" Q
consisting of a single layer, by measurement in accordance with 29.3.4, or |
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