|

楼主 |
发表于 2011-6-5 15:25:03
|
显示全部楼层
来自: 中国河北保定
本帖最后由 yjybd 于 2011-6-5 16:26 编辑
5 F* J8 f8 m0 b/ |1 X4 B4.1.7 Joints/ {, M" y# {) C/ r8 z1 o" U$ T2 B
) k% f7 V' K# `0 a( B7 h. B" Y
" x4 v5 G6 I8 ]3 ` W6 D
: ]% I! p& b6 }% X( M. d4.1.7 Joints三维网技术论坛. Z+ w# Z) |# g6 F1 n0 |9 k% Y; }2 E7 q, B) m# a% E
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; S
. b$ {- E9 A4 G6 m! @3 P0 {$ {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- _" G! ~1 M0 L1 M6 S- V/ @
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% C T# {7 p6 G, s
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+ x- w- L- y, x" oIn a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of4 E; B% m- b+ h$ y, I% y, z+ r) A' {
: s9 x: F2 H/ L4 r i) o三维网技术论坛stranded members (primary groups), each member shall be considered equivalent to a solid wire, and aswww.3dportal.cn. `5 m) @ Q4 S1 }: F8 u6 G
* Z# m% f0 o! D4 L' X' x# _such, 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
4 [( K( f9 R2 d' G: u* L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 / A6 K! ]2 I" N! e, _$ R+ ^
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———— |
|