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jsspace 发表于 2014-8-6 16:52
$ C- Z& U& A9 T- q美规里thermal insulation是隔热材料的意思,这个在UL1598上有 + v/ Q7 O% h1 N# W
这个有点区别,是thermal insulation.
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5.18 Thermal insulation8 E9 V; G8 m8 r$ o7 R, [$ h
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or
5 l/ a, _# M: b9 K6 Lpolymeric material.; O) ~2 p2 ^' v% q Q
5.18.2 A polymeric thermal insulation material shall:
& O1 z$ T4 N/ x" E) a3 `" d(a) have a temperature rating equal to or greater than the operating temperature in the
" ^* k0 K9 _/ [luminaire; and+ c: `6 O. Z ^+ J4 a
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of
. H% K0 H) E. j3 oClause 16.25.
+ }! K# |+ m8 ?9 R# b2 X/ a5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the" P, Z' l) i! ], Q$ ] C2 u
correct position by at least one of the following means:
4 F* a) N! W1 f8 y+ q+ K(a) staples or bolts;8 I/ y( A3 u7 h
(b) adhesive applied to at least one-third of the surface of the insulation;: E' ~' ^5 B4 U$ h
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor; ]$ E$ h8 d9 v5 g2 |
projecting through the insulation is not acceptable for securing the insulation in place; and
4 O: U2 N, W/ n) \(d) other means if investigated and found to be mechanically equivalent.7 s' @+ M) }) ~$ J! e0 J% I, b8 D0 R
5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection2 q9 Z9 T S) O& m) L- G
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is
- }" N, g; J& S/ f; Dbeing attached to the luminaire.
) Y( d; Y2 l: M3 f j4 K# C" @5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum3 e7 x. L$ `4 N* v0 N* ^
density of 9.6 kg/m3 (0.6 lb/ft3). |
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