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jsspace 发表于 2014-8-6 16:52
5 E% [8 t) k2 ^7 g; c. ~% |4 d美规里thermal insulation是隔热材料的意思,这个在UL1598上有
! j' _2 ?9 a5 q% y! n这个有点区别,是thermal insulation.
4 k' N% G/ S R, R6 A/ M8 N
/ C4 u/ _& x+ o& F3 H$ i |; r s5.18 Thermal insulation
5 F% t: ?1 t8 O8 v' [* p5.18.1 Thermal insulation shall be fire-resistant material, such as glass fiber, inorganic material, or
/ d7 `+ A- h; _! |, ^* \+ lpolymeric material.
# H, Y; P/ x. X0 h4 W0 q# g$ W8 Q% v5.18.2 A polymeric thermal insulation material shall:
/ V5 M2 v6 m' `5 _# m% W(a) have a temperature rating equal to or greater than the operating temperature in the
) j E. O; ?7 H6 C) M4 i0 N0 L# Lluminaire; and; w1 i* c' I, E. g
(b) have a minimum HB flammability rating, or comply with the horizontal burning flame test of5 c4 H7 A$ `# N# e
Clause 16.25.
6 [% X! c8 G# y6 F& d+ @ G# P5.18.3 Thermal insulation shall be reliably secured in place. It shall be attached to the luminaire in the M* ?+ i+ d5 M; Y
correct position by at least one of the following means:
$ x8 H, N+ |2 q(a) staples or bolts;* Y9 h' V$ J7 w) d. f
(b) adhesive applied to at least one-third of the surface of the insulation;
$ I, e" K! N3 j& i(c) parts of the luminaire that do not have to be removed for installation. A supply conductor
* ~1 `: X: I/ `0 Yprojecting through the insulation is not acceptable for securing the insulation in place; and' r' z! z B- f+ O! ~3 p1 j, ?9 h8 f
(d) other means if investigated and found to be mechanically equivalent.
8 b k# _8 f/ V: f! g% I5.18.4 Thermal insulation shall not be located within 6.4 mm (0.25 in) of any opening for the connection8 ~- `" W7 B: x% U- ^$ O& G% c
of conduit unless the insulation is attached to a cover or other part that will be removed when conduit is
2 `! d, X( \ u4 e( Hbeing attached to the luminaire.
" c+ X" ]6 ?( t# Y3 G! g( z5.18.5 Glass fiber thermal insulation provided as an integral part of the luminaire shall have a minimum
# ^' C5 R. C& L# R& o u" Qdensity of 9.6 kg/m3 (0.6 lb/ft3). |
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