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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
P8 D5 P) I, M- n0 @' l& w美规里thermal insulation是隔热材料的意思,这个在UL1598上有 ; ~3 L# H# E* f9 c t* X
这个有点区别,是thermal insulation.
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5.18 Thermal insulation" N, i" d# z6 e# D( B5 c
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or
& x' F+ P/ R8 u1 ]! Qpolymeric material.. d8 p/ p! J- G0 ?- @5 E) ]
5.18.2 A polymeric thermal insulation material shall:
' b8 u ?" A% y(a) have a temperature rating equal to or greater than the operating temperature in the
9 c1 c. A' |" b; H! Aluminaire; and
2 V7 |( _% p ^" c3 o(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of
2 e6 Q5 M. f" o+ g7 P5 R, XClause 16.25.
* T+ f w& Z3 x! n3 p o9 \5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
4 O% _, x; ]# pcorrect position by at least one of the following means:
2 c; R4 E- X5 C3 B% b(a) staples or bolts;
/ @! c4 t, Q: O" a7 g) M/ F(b) adhesive applied to at least one-third of the surface of the insulation;
- S: d! I* k( v# L8 o }& W) @- q(c) parts of the luminaire that do not have to be removed for installation. A supply conductor6 X3 q5 j1 Z4 U
projecting through the insulation is not acceptable for securing the insulation in place; and
+ }4 p1 s0 h5 G6 I9 h2 H* b7 P(d) other means if investigated and found to be mechanically equivalent.
# c+ w q: G# F" N( s/ Z$ H5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection' w8 K/ X) |" m9 D6 S6 o1 T+ A
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is
6 V4 f0 u+ n( d5 ~, S4 rbeing attached to the luminaire.
2 e% c' v. F' g! I1 y9 d$ R5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum5 R" n" E/ q/ g) ^& n
density of 9.6 kg/m3 (0.6 lb/ft3). |
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