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29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
, l0 k5 ^) s4 U* kor have a sufficient number of layers, to withstand the electrical stresses that can be expected4 K8 k" S$ @+ d
during the use of the appliance.3 m: M2 b" [6 M
Compliance is checked
: v; O/ a) S: O' S7 v– by measurement, in accordance with 29.3.1, or
4 N( ]+ S+ A3 M v– by an electric strength test in accordance with 29.3.2, if the insulation consists of more& {/ Y: s' ?* k. | C* `) S! i
than one separate layer, other than natural mica or similar flaky material, or$ L8 b- T5 k! `* i
– by an assessment of the thermal quality of the material combined with an electric strength
+ b0 p% J3 f: \! \) M7 ^% Z6 D6 C0 ]test, in accordance with 29.3.3 and for accessible parts of reinforced insulation
1 q3 F+ }7 q" n. V4 Nconsisting of a single layer, by measurement in accordance with 29.3.4, or |
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