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

8 Z7 Z' V$ Q# d% ]
小于24AWG应该是不允许的。最小可以到24AWG。
/ x+ T% i8 S. C5 h. N7 O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：
; i+ |: t& U  d, d# BUL1598
6.9.3 Conductors of a size smaller than No. 18 AWG, but not smaller than No. 24 AWG, may be used
: M3 G8 m- k( Y- i! S+ s, Iunder the following conditions:
(a) where they are completely enclosed;
(b) where they are not subject to movement under normal use; and
0 g. x8 t  a& j# s- y. ^* r& C(c) in the secondary of a transformer, or in a circuit using solid-state devices.
' Z( u( d7 |% Q2 r7 H1 R: M
6 `- g9 g6 s- C6 m- E0 u

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:
3 I5 v5 |1 W+ C$ G% k" k(a) the conductors are in Class 2 power limited circuits only;
4 Y$ k5 w. ~1 ^5 q" v3 y. F! R(b) the current carrying capacity of the conductor is not exceeded and is sufficient to carry the
continuous normal load current without any temperature related issues; and
7 R! R) D) M  M4 c* D(c) the construction complies with Item (1) or (2), as follows:

tsunn

依然 发表于 2013-6-24 09:13
. j# A/ ~' m% |按照UL1598，小于2AWG的电线是可以用的，只要满足以下abc：
7 Y5 Y/ \$ j+ _# o5 \9 |2 J9 k! @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。
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
& Z) k1 p: c' E$ fconditions of intended use, including relamping, servicing, and inspection of supply connections.

jsspace

tsunn 发表于 2013-6-24 10:21
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。
% G- V8 {& h3 X4 B2 w1 |我看到的是：6.9.4 A condu ...

2 f, Y$ C1 D) N. BLZ的这个产品根本就不需要看UL1598， 看UL2108就可以了。
. c4 b9 j: U* X% p再说你手头上的2004的UL1598太老了，现在用的是2009年的了。
' D* A5 r3 q" C/ ]5 Q

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
) L1 F# y- z- y# R/ Y3 u% j& E! L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

% M0 w. n- S( t2 S+ g7 G5 r可以小于24AWG，请参看UL8750-2012 第7.3.7章节
" M: q# L; |1 a: v' s% V' Nconductor of any size are permitted when the conductor are in class 2 or LVLE circuit.....

依然

) n; f+ g+ K& z3 ~( S7 S8 d
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。
/ h# {' ^. E0 H- V' n
5 `5 f" N: N7 W' `* J& TUL153（March 15, 2013修改）：
9 }  R4 D! i' l# p, J27.1.1 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.

UL8750 (7.3.7 revised October 17, 2012):
) n1 `; C! ?/ i6 S! B0 }4 m& ]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
+ x% _. B3 a7 @3 ~4 A6 m3 m  `barrier or reliably fixed spacing of minimum 6.4 mm (0.25 in).
1 r8 L/ e3 ]8 s6 Y* Q- Y- D2 m
5 B/ B; ]) a1 ~9 M5 W$ z# f+ PUL2108（15.2 revised July 15, 2010）：
15.2 Conductors shall be 18 AWG (0.82 mm2) minimum.
8 C  V8 V: u6 \Exception No. 2: Conductors of any size are permitted when the conductors are in Class 2 or equivalent
1 G' j* G5 n- i: K4 P: N$ r" tisolated low voltage, limited energy circuits only and are physically separated from all other non-Class 2
or non-isolated low voltage, limited energy circuits, such as by a barrier or reliably fixed spacing of
minimum 6.4 mm (0.25 in).
) \8 r, r& r6 BUL1598 （SEPTEMBER 17, 2008）
) `2 B  g( Y& D& a, E2 A* A4 u$ M* ]6.9.4 Conductors of a size smaller than 24 AWG (0.21 mm2) may be used under the following conditions:
7 y) I- a  r" O(a) the conductors are in Class 2 power limited circuits only;
( e" W$ q8 C( a( c/ {) Y0 i

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
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
我什么都做BSMI, UL, CE, CQC, SAA，表示头大

) R9 Y4 V9 i4 }- e跟着大家好好学习