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发表于 2014-8-6 16:55
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jsspace 发表于 2014-8-6 16:52 9 W$ b4 a+ D% n/ S. f" g
美规里thermal insulation是隔热材料的意思,这个在UL1598上有 8 t+ S: ]/ k: j) H
这个有点区别,是thermal insulation.
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5.18 Thermal insulation1 Z. k7 k; {, V% L8 L( h
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or3 T. q3 ]; w2 K3 L
polymeric material.
7 i" p$ d/ h4 a! I5.18.2 A polymeric thermal insulation material shall:2 X# x i8 D- m( j$ Z& A
(a) have a temperature rating equal to or greater than the operating temperature in the4 w, }: n1 K. v7 s
luminaire; and) ?# u! W, I* v3 j
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of: P6 E' ?8 L" D( G
Clause 16.25.& G3 z% Y3 M/ C
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the5 @, e' J6 n. }/ |5 [
correct position by at least one of the following means:
' u' N6 x9 s |) F(a) staples or bolts;
8 E, k: K" |) G(b) adhesive applied to at least one-third of the surface of the insulation;8 v2 Z$ w& D9 `# {0 A3 P6 z
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor+ x5 J) ^8 U z% G" _. K1 M+ b3 w" }4 H, t
projecting through the insulation is not acceptable for securing the insulation in place; and4 F7 l; q9 m( U$ u9 t2 H. y# A- V
(d) other means if investigated and found to be mechanically equivalent., y# b2 `) { V; J+ s% E5 m
5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection4 E1 g- R$ r' q; g
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is
) ]% g- i7 x2 C1 Pbeing attached to the luminaire.
; n! W" g7 A& |: l' X5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
3 i$ [# {: {4 Rdensity of 9.6 kg/m3 (0.6 lb/ft3). |
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