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jsspace 发表于 2014-8-6 16:52 & n7 `4 Y2 s" o7 E m" j
美规里thermal insulation是隔热材料的意思,这个在UL1598上有 6 H {- k/ K8 ] q1 K# j
这个有点区别,是thermal insulation.
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5.18 Thermal insulation: `3 i; w: B/ f. g4 i$ m, l3 b% V
5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or6 N: M% W$ ~- H5 e2 u
polymeric material.8 h6 m) F; r G' B3 \- C: w J
5.18.2 A polymeric thermal insulation material shall:
: c4 Z: {" L6 v- q# @+ T4 q(a) have a temperature rating equal to or greater than the operating temperature in the7 Y/ m1 B2 a4 y0 T" c" W
luminaire; and
$ i; D! Y0 Z, l/ b6 z* P' l(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of4 i0 [7 ^# A7 c4 t: x! r0 d9 P
Clause 16.25.# N8 p) c* n% @5 Z* C
5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the; K1 b* R3 Q" u; _# Y, I2 s
correct position by at least one of the following means:
3 I: `) ^, S: N- n R% D0 K; `(a) staples or bolts;- j5 B+ |: T1 N" \2 ^
(b) adhesive applied to at least one-third of the surface of the insulation;7 T$ [: B' `8 d! i2 x
(c) parts of the luminaire that do not have to be removed for installation. A supply conductor- J$ ]; W' @2 p/ v0 F) T1 ]
projecting through the insulation is not acceptable for securing the insulation in place; and
; J3 |8 w% Z H' p% z5 P2 d! s(d) other means if investigated and found to be mechanically equivalent.) |4 f& h; q3 r# z/ C. \
5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection# j$ f& M8 w9 b, l
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is6 y* \4 g1 D r/ W! V) {. L- s
being attached to the luminaire.
/ B( a: k! J/ P( ?; z, w5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
. g1 e" [; x, S/ X: {density of 9.6 kg/m3 (0.6 lb/ft3). |
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