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jsspace 发表于 2014-8-6 16:52
; e8 G0 K, ?3 R美规里thermal insulation是隔热材料的意思,这个在UL1598上有
g; t M* |1 L这个有点区别,是thermal insulation.
$ H* B* a9 w `6 k- ]$ l2 U; N# b& ?. V
5.18 Thermal insulation% ]( V( W. [* U8 X% D* z" l
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or- T- b) W# a9 k9 c
polymeric material.
6 b( K5 G B. O. `8 J3 E+ H2 u5.18.2 A polymeric thermal insulation material shall:
- B. g' C2 h' P5 T ~" C(a) have a temperature rating equal to or greater than the operating temperature in the. o, C2 s4 T7 ]+ B; T1 _
luminaire; and; | `, h, u) l' y. w
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of% f. I! D8 p4 p+ T- E1 _
Clause 16.25.8 X1 Q( }" y' n; Q% O4 w$ B
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the; S4 ~! u( ]# K1 m% y' `) M
correct position by at least one of the following means:
% K; Q0 V+ }( ~. A( o" h(a) staples or bolts;% e9 k* m/ V1 a; F8 ^8 r0 h. ?& S' T
(b) adhesive applied to at least one-third of the surface of the insulation;( m( r" U+ P# _& v+ P
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor
. s- |2 f! F- }; oprojecting through the insulation is not acceptable for securing the insulation in place; and
1 r- W6 v; L6 L5 s$ ?. ]5 s6 P/ P(d) other means if investigated and found to be mechanically equivalent.
7 O5 o+ U0 a) a' m4 Y5 K5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection2 i: m! R, s7 P& J) s7 Q7 P: `! t _
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is0 I& v7 ^1 ?2 o8 I+ ?% F
being attached to the luminaire.
6 g1 y, |+ |' v; v0 [" G5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
! w0 p# l+ Q) X* X7 W* L/ hdensity of 9.6 kg/m3 (0.6 lb/ft3). |
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