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发表于 2011-5-20 09:53:36
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来自: 中国上海
4.1.7 Joints
" L/ ] r5 {7 P2 t/ K" tA joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase
! `, C! ?. l( bthe diameter nor materially decrease the strength of the conductor or the individual wire. No more than
9 A0 B. j X4 Ione of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given/ I& J2 s' g" {$ G
layer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor.2 }2 Y. c& ~) W% }! V
In a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of8 B9 I q9 }2 x! l @1 x2 M, S
stranded members (primary groups), each member shall be considered equivalent to a solid wire, and as0 Y6 Q# I: b+ j3 B
such, may be spliced as a unit. These joints shall not be any closer together than two lay lengths.2 }+ I0 q2 k' [
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! |
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