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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 
8 W' {* a9 J' I美规里thermal insulation是隔热材料的意思,这个在UL1598上有
. \/ @/ y/ P( |4 g! v& d6 |6 v这个有点区别,是thermal insulation.
& T' ^9 e1 R( J( H2 W0 u/ ~. R R) D. v1 S/ m& |
5.18 Thermal insulation
7 \% V0 k; d, X- O' W" W1 a: m5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or7 } H' {$ e c* K& D
polymeric material.
0 b, H4 _3 o4 N& L5.18.2 A polymeric thermal insulation material shall:3 H8 O$ D$ M. f% |" S& e
(a) have a temperature rating equal to or greater than the operating temperature in the
2 G3 N/ _0 x# Jluminaire; and. w& K# @+ r' T7 I( ?# G
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of$ ?. y. a* D3 y
Clause 16.25.
, }2 b) b* I8 F: p6 c5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
5 Y0 e- L& O( W) R; _6 Mcorrect position by at least one of the following means:
P F5 F# H7 Q; K: o! ](a) staples or bolts;# U, v% F7 E! d7 W* \ \: o. m" T
(b) adhesive applied to at least one-third of the surface of the insulation;
2 ~4 h9 S) }3 X6 n/ i* k0 f# G8 a9 `) Q(c) parts of the luminaire that do not have to be removed for installation. A supply conductor
' F. |0 X8 D8 I' r0 p* j9 c# L" F8 cprojecting through the insulation is not acceptable for securing the insulation in place; and) z' a" \% K' U2 J7 O: I$ ~
(d) other means if investigated and found to be mechanically equivalent.
- V/ {+ H$ L% z. Q" {6 w' M5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection
% V. x( l* k1 H$ hof conduit unless the insulation is attached to a cover or other part that will be removed when conduit is. l' S( l! y) c( o7 [7 S* _
being attached to the luminaire.
- ~. y; D8 q0 g* D5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
/ G g- ^% h/ {6 g. t0 mdensity of 9.6 kg/m3 (0.6 lb/ft3). |
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