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发表于 2011-6-5 15:25:03
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来自: 中国河北保定
本帖最后由 yjybd 于 2011-6-5 16:26 编辑 / O: V/ }1 q" `2 x% a6 i% i9 _ ^$ Q
4.1.7 Joints" G0 X7 C# L7 x
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4.1.7 Joints三维网技术论坛. Z+ w# Z) |# g6 F1 n0 |9 k. D% l+ p b1 t! I" o
A joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase三维|cad|机械|汽车|技术|catia|pro/e|ug|inventor|solidedge|solidworks|caxa& }* D" x3 H* S$ b6 s% b; S1 o! t( R, Q% I1 R, G0 V0 n! t
the diameter nor materially decrease the strength of the conductor or the individual wire. No more thanwww.3dportal.cn4 q6 ` L& {6 ]3 S' h% C7 Z2 l: r8 P- g" H. Y
one of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given三维|cad|机械|汽车|技术|catia|pro/e|ug|inventor|solidedge|solidworks|caxa$ X2 S& e" d. q: o9 c& p% C1 x" t6 M# h+ }. J2 f
layer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor.三维网技术论坛+ v9 _( E8 @: V& H2 }/ K" M+ {/ j! }$ }. [7 [7 N
In a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of
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1 \ L) O2 [1 n/ G5 X6 n; Dsuch, may be spliced as a unit. These joints shall not be any closer together than two lay lengths.三维网技术论坛6 X: O! X: d& b
( y0 s, f5 R; [. J& A美国UL44橡皮电缆标准里的一段话,如果有接头,接头既不能太多,也不能太大! | zhaogy2006 发表于 2011-5-20 10:53 http://www.3dportal.cn/discuz/images/common/back.gif $ o- K2 t! N. G, ^8 R( V
不能太多,也不能太大,那多少是合适呢?? 原来美国人也玩文字游戏———— |
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