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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
& `" Y K( k+ A, v: g美规里thermal insulation是隔热材料的意思,这个在UL1598上有 * u& Y) B+ W- Z
这个有点区别,是thermal insulation.
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' a- x/ z+ D6 N0 O; j0 i1 a* y5.18 Thermal insulation
" V9 U1 ?/ w1 g4 T+ Q+ r. W5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or$ G* }, k' O! ~5 n0 Z/ t" j+ a1 |" ^
polymeric material./ F/ G* X% Z$ M, T. c5 n O+ k
5.18.2 A polymeric thermal insulation material shall:
1 o' Z3 u6 ~& s2 \9 w: m! [(a) have a temperature rating equal to or greater than the operating temperature in the
+ i) S" ~; E9 U. T/ pluminaire; and3 T. T% w! a7 S1 y8 [9 e% X5 Q
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of# z# \4 L/ {, C* c
Clause 16.25.% B$ b- O9 [! ^$ r
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
8 \0 Z" ~1 {$ \) Qcorrect position by at least one of the following means:
( a3 \. Z) ^) Q: F( n* B& R0 F, s(a) staples or bolts;
' r; C2 Z6 Q1 }! S5 l(b) adhesive applied to at least one-third of the surface of the insulation;
1 c; v7 V- b' o$ s4 ~0 D5 R, }) j3 ]! l(c) parts of the luminaire that do not have to be removed for installation. A supply conductor% d+ ~( J( T7 ~# o' `# F2 J
projecting through the insulation is not acceptable for securing the insulation in place; and0 l9 ^ v( C. R6 R u
(d) other means if investigated and found to be mechanically equivalent./ M$ C2 }( G3 N) ?) Z
5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection
* V" W* m$ A. u7 h" u4 \8 d' x! `of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is) c- u$ e4 Q: B C7 T; x
being attached to the luminaire.
3 B9 ~- [1 G# |6 Q) P5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum6 k; }7 S8 n1 ~/ V
density of 9.6 kg/m3 (0.6 lb/ft3). |
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