灯具里面可以使用低于24AWG的内部导线吗？

tsunn

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

/ h  V0 u8 W" u2 A4 m5 V9 d
小于24AWG应该是不允许的。最小可以到24AWG。
楼上说了2108的15章写了最小24AWG，其实1598也写了最小只能到24AWG：
UL1598
6.9.3 Conductors of a size smaller than No. 18 AWG, but not smaller than No. 24 AWG, may be used
% S5 g6 R$ V4 t& c! m  x4 xunder the following conditions:
2 O8 K( y, s" ~+ \2 E" t6 U6 ^9 A(a) where they are completely enclosed;
(b) where they are not subject to movement under normal use; and
& x3 f5 l0 \' g" N/ L. n- p* M% H0 u(c) in the secondary of a transformer, or in a circuit using solid-state devices.
9 [4 P1 h  d( u# C
0 R: j0 a) T. Z

依然

按照UL1598，小于2AWG的电线是可以用的，只要满足以下abc：
6.9.4 Conductors of a size smaller than 24 AWG (0.21 mm2) may be used under the following conditions:
(a) the conductors are in Class 2 power limited circuits only;
(b) the current carrying capacity of the conductor is not exceeded and is sufficient to carry the
* }2 Z$ p) p6 a+ o; I( I3 Ncontinuous normal load current without any temperature related issues; and
; v5 U: B8 E$ f4 s+ y- q2 ~, j8 J  F(c) the construction complies with Item (1) or (2), as follows:

tsunn

依然 发表于 2013-6-24 09:13
4 r9 S2 g7 e- }) D按照UL1598，小于2AWG的电线是可以用的，只要满足以下abc：
6.9.4 Conductors of a size smaller than 24  ...

我看的是2004版本的UL1598，没看到6.9.4有这样写，是不是有最新版的更改了。
( c; P3 \" c5 S9 ]2 t9 V2 o. G; N我看到的是：6.9.4 A conductor or cord that can be flexed because of an adjustable, movable, or flexible part of a luminaire shall be of the stranded type and shall be secured so it will not be cut or abraded under
) Y% y$ s0 g* ~. |( V% jconditions of intended use, including relamping, servicing, and inspection of supply connections.

jsspace

tsunn 发表于 2013-6-24 10:21
( K9 E- }: B; }7 k! X- H我看的是2004版本的UL1598，没看到6.9.4有这样写，是不是有最新版的更改了。
5 }! x" U: ?$ R! N4 ^2 H我看到的是：6.9.4 A condu ...

LZ的这个产品根本就不需要看UL1598， 看UL2108就可以了。
再说你手头上的2004的UL1598太老了，现在用的是2009年的了。
/ |; i/ n+ h. K4 I( [, {; K

jjlamshushushu

看UL8750，输入是高压的，所以电线最小要18AWG的，输出线是低压的，要求最小24AWG

jsspace

jjlamshushushu 发表于 2013-6-24 10:38
7 E& a. E0 j6 [3 X" D0 ?3 F看UL8750，输入是高压的，所以电线最小要18AWG的，输出线是低压的，要求最小24AWG

可以小于24AWG，请参看UL8750-2012 第7.3.7章节
conductor of any size are permitted when the conductor are in class 2 or LVLE circuit.....

依然

! {6 q+ h) b0 k1 V
对于class 2后面的电线，其实UL已经允许任何线径的电线使用了，大部分灯具标准中都已经做了修改。
+ F) q, C# Y3 W7 N0 C3 t( D
  \; u2 U  q0 T. t( H" rUL153（March 15, 2013修改）：
27.1.1 A conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size
is permitted in (a) – (d) below:
b) A conductor in a Class 2 circuit is permitted to be of any size.
" b+ K4 q7 z# K0 f" X- M
" Q' M% `) T3 i/ [UL8750 (7.3.7 revised October 17, 2012):
7.3.7 Conductors of any size are permitted when the conductors are in Class 2 or isolated LVLE circuits
only and are physically separated from all other non-Class 2 or non-isolated LVLE circuits, such as by a
barrier or reliably fixed spacing of minimum 6.4 mm (0.25 in).

* v8 G0 A: Z* OUL2108（15.2 revised July 15, 2010）：
1 G. r6 E* i% O" {9 _/ n15.2 Conductors shall be 18 AWG (0.82 mm2) minimum.
Exception No. 2: Conductors of any size are permitted when the conductors are in Class 2 or equivalent
7 D9 s7 S1 ^- e0 N: p' P9 G+ x" _isolated low voltage, limited energy circuits only and are physically separated from all other non-Class 2
3 d6 X2 u0 S+ A0 P% X$ Zor non-isolated low voltage, limited energy circuits, such as by a barrier or reliably fixed spacing of
minimum 6.4 mm (0.25 in).
UL1598 （SEPTEMBER 17, 2008）
) t7 r1 m! s  G. ~6.9.4 Conductors of a size smaller than 24 AWG (0.21 mm2) may be used under the following conditions:
(a) the conductors are in Class 2 power limited circuits only;

依然

大家对标准更新要及时关注，有些条款是很重要的

jsspace

tsunn 发表于 2013-6-24 10:21
. l# I- k: [3 q( w- _( x' a5 r我看的是2004版本的UL1598，没看到6.9.4有这样写，是不是有最新版的更改了。
我看到的是：6.9.4 A condu ...

我什么都做BSMI, UL, CE, CQC, SAA，表示头大

切莫溪水

jsspace 发表于 2013-6-24 11:16
3 s9 T$ O# @" a7 l' N我什么都做BSMI, UL, CE, CQC, SAA，表示头大

跟着大家好好学习