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jsspace 发表于 2014-8-6 16:52 ' r4 L/ t4 m; b
美规里thermal insulation是隔热材料的意思,这个在UL1598上有
6 h0 B& N- X9 |* n这个有点区别,是thermal insulation.- H$ a/ E I& H/ p2 k" r* W
+ u$ h3 b. a" q O2 b3 {7 q
5.18 Thermal insulation6 ]+ ?1 J: L8 g* T+ j
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or7 F' {# ]& M: ]1 ?
polymeric material.9 z) y$ u8 k! L# k* S8 v
5.18.2 A polymeric thermal insulation material shall:
; p$ p5 ^5 r" v2 `* n/ ~(a) have a temperature rating equal to or greater than the operating temperature in the2 x! O) W0 j% O9 b x% V
luminaire; and
$ `$ E. i8 c2 ]0 K) E(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of
7 W+ B& H/ T7 o; Q. O$ F; H: C( DClause 16.25.2 x' d/ h2 v5 y
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
) y+ M0 _8 Q+ D* Acorrect position by at least one of the following means: ]. {0 \* l2 W
(a) staples or bolts;
, O+ V9 T4 s, I7 V; p(b) adhesive applied to at least one-third of the surface of the insulation;# ?* R! ]/ A/ k
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor
3 S9 D$ `* R. j; P& B1 {) Bprojecting through the insulation is not acceptable for securing the insulation in place; and( N) f$ R1 i) `+ j
(d) other means if investigated and found to be mechanically equivalent.
8 U) G+ Q# v2 u+ d5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection, y3 {- |! C; |& x7 H C
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is; M$ Q) i5 U4 s( T; p
being attached to the luminaire.
( _' D3 D' d$ f M$ E5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
1 L9 o A6 R) [8 T; D4 j2 udensity of 9.6 kg/m3 (0.6 lb/ft3). |
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