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是这种防火棉8 {, e! v x. i: O
5.18 Thermal insulation
' S4 b/ a, s+ f' I# V5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or
. x% [, }! e5 x% U* r- s" Tpolymeric material.
' E' \9 A) v. V# f2 o3 l! d2 Z5.18.2 A polymeric thermal insulation material shall:
0 @7 O/ X% ?/ p8 e, D8 a, T(a) have a temperature rating equal to or greater than the operating temperature in the
, z c, s% O& t8 T# Q/ x8 Cluminaire; and
# |( E: }5 A2 n(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of& H0 E9 F0 ~0 M3 X4 R
Clause 16.25.
4 b, Y3 V- z0 T5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the
# r( P/ P( N- T8 p7 xcorrect position by at least one of the following means:
& ?4 M ^( f+ l- ], a$ V(a) staples or bolts;- O0 u- t4 s( c/ {2 S- M
(b) adhesive applied to at least one-third of the surface of the insulation;
; c0 p0 r8 `" b' v1 g% } i(c) parts of the luminaire that do not have to be removed for installation. A supply conductor
$ w+ U/ w; b% \+ W0 t% x$ n+ _projecting through the insulation is not acceptable for securing the insulation in place; and
7 P3 P! Z3 ^. {- u9 S" B0 ^# R(d) other means if investigated and found to be mechanically equivalent.
4 H1 [* |( X3 o4 d: y/ P5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection8 p+ Q0 [- c I) Q" @) W% ^
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is3 X" C; ^; d# p/ M5 {
being attached to the luminaire. {- C- d. W: c) ~# g' s
5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
4 x2 k" R- J" @density of 9.6 kg/m3 (0.6 lb/ft3). |
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发表于 2009-8-11 17:47
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发表于 2009-8-11 19:14