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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 0 X8 F U7 @, ?! i5 \, _ o* D
美规里thermal insulation是隔热材料的意思,这个在UL1598上有
6 {" G* y0 ^& X6 K5 ~; s* U, _这个有点区别,是thermal insulation.% {8 b4 Q# l% E/ p. ?' i. K, W; x! M
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5.18 Thermal insulation% ]" V8 a( q; E7 Z# F! I6 y9 J
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or9 L) G* l( x) _. E- b! O
polymeric material.3 O3 h+ H8 [9 k' B' o- l
5.18.2 A polymeric thermal insulation material shall:
1 E5 c( {3 J( I* w, z(a) have a temperature rating equal to or greater than the operating temperature in the- T8 T+ Y- ^+ U; q- F4 P9 A
luminaire; and/ t. j0 J6 j, \% s" w1 _
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of2 T1 D. M @+ L/ _
Clause 16.25.4 x" C. y" t: O' Y) e- y! ]
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
) B% D3 J- T" t T8 Wcorrect position by at least one of the following means:- W+ J- d3 A+ }7 q+ O7 T X6 y; `
(a) staples or bolts;3 d# t* t7 {4 d" ^) s
(b) adhesive applied to at least one-third of the surface of the insulation;7 A. [ `8 }1 K+ I/ a
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor) [5 O9 m3 d2 d( D; [3 b
projecting through the insulation is not acceptable for securing the insulation in place; and
/ V5 V# U" q- z) a0 Z(d) other means if investigated and found to be mechanically equivalent.
# S. C6 w' |1 Q5 _5 ?. ?5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection* L/ m' y" F- b5 N
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is. @% v9 ~1 p4 j c
being attached to the luminaire.
! f Z( W/ U7 Z0 s! k' V/ [5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
3 T+ N# u' B0 adensity of 9.6 kg/m3 (0.6 lb/ft3). |
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