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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 ' v% A5 t% h& W0 G ]
美规里thermal insulation是隔热材料的意思,这个在UL1598上有 ?$ x2 j! B- L4 N
这个有点区别,是thermal insulation.' }* w9 } K# `0 A
1 {; v" V* l7 D# a9 @5.18 Thermal insulation
x9 J& v* I5 d, X7 |5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or
- d9 l* T$ c* q opolymeric material.6 G& k0 v* N! D5 q/ }1 y
5.18.2 A polymeric thermal insulation material shall:! _) O% H& F, z1 ^# h
(a) have a temperature rating equal to or greater than the operating temperature in the8 ^0 B, p$ O6 Y+ P B0 u
luminaire; and
$ N2 `$ m) }* C, w/ F% {' L( B A(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of
, S: F* j) ?- Q! E+ BClause 16.25.
- o5 d& @6 [+ _$ d' f5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the# p5 L0 Y. h4 T) n
correct position by at least one of the following means:
4 A! P- E( ?7 s2 M5 a(a) staples or bolts;
2 E" \6 K/ d4 r \ [(b) adhesive applied to at least one-third of the surface of the insulation;
: ` g+ G! a& ~8 N% y! b7 @5 ]& w$ Y(c) parts of the luminaire that do not have to be removed for installation. A supply conductor
1 B8 K; l4 t, e8 uprojecting through the insulation is not acceptable for securing the insulation in place; and
% z; s0 [& l( e: [/ g- X3 a4 y! l(d) other means if investigated and found to be mechanically equivalent.+ F: e; D6 F; i5 L7 a
5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection
. M1 I {4 G- Hof conduit unless the insulation is attached to a cover or other part that will be removed when conduit is
- I8 h( E/ Y" [* M$ z8 j. C' Cbeing attached to the luminaire.4 T/ E! w7 K K# T
5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
0 U0 R0 j. l" C+ |( ]2 Odensity of 9.6 kg/m3 (0.6 lb/ft3). |
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