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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,6 @8 J Z! s- G6 n
or have a sufficient number of layers, to withstand the electrical stresses that can be expected
( a9 }" B. m8 I9 {4 ]; `. Z% aduring the use of the appliance.
& y" q0 p, y0 J! zCompliance is checked
- l+ Z) D: r5 o6 L0 g– by measurement, in accordance with 29.3.1, or `) ^' \: W* R4 i6 h' l! p1 s
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more" Z, M' @. a/ U" \1 ?- ~7 q
than one separate layer, other than natural mica or similar flaky material, or
; f9 T' ^0 y; H z- E& b* F% E– by an assessment of the thermal quality of the material combined with an electric strength" U( G' h- r' ^; F- [" C0 |+ r H
test, in accordance with 29.3.3 and for accessible parts of reinforced insulation2 c' @$ A6 o4 g
consisting of a single layer, by measurement in accordance with 29.3.4, or |
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