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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 
% A( {( Y' s9 b9 p美规里thermal insulation是隔热材料的意思,这个在UL1598上有
* a. |' t( T8 x3 U, H( R6 \这个有点区别,是thermal insulation.- ?4 s# F& l# @
$ g, L, ]3 O& `, N7 a5.18 Thermal insulation; U/ @* D7 c" G: v0 @2 Q% [: ^
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or
5 Q g, T/ F4 }. r r& k0 Jpolymeric material.
& I* T1 A( Z( \" U! O+ S7 E5.18.2 A polymeric thermal insulation material shall:5 R0 ?( h. Q3 B9 \) z% ]( M$ i3 [
(a) have a temperature rating equal to or greater than the operating temperature in the% V/ B5 r1 W4 a2 d0 k% Z
luminaire; and
p5 G1 V6 ~% e! u$ j(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of3 O; d4 K) i) b2 I! Q" u
Clause 16.25.5 ~- O. D: m. o# h% c. i/ C
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
( ?4 ~$ e8 T$ jcorrect position by at least one of the following means:
3 Z0 c6 ?7 P# M2 i: f ]9 b$ V% d6 T(a) staples or bolts;( ?$ W* W& e+ l: {2 e, o5 ~
(b) adhesive applied to at least one-third of the surface of the insulation; _& `3 W* @5 y% u' k F
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor: I4 {6 z+ x) x# [
projecting through the insulation is not acceptable for securing the insulation in place; and
/ X/ O. P9 q9 V4 w) Z+ w(d) other means if investigated and found to be mechanically equivalent.
0 L7 S0 \) k3 _1 y5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection; D) I9 E5 d* Z+ ?' U+ s: t
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is
' }' A6 d& V3 i* g6 A- T6 H* Qbeing attached to the luminaire.# B$ J& n4 u' @
5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
3 W+ ]3 D8 s) f f0 w& t8 e7 ydensity of 9.6 kg/m3 (0.6 lb/ft3). |
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