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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. S4 v1 J; D ]
A joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase3 U P& t5 L, q# m. Q& P
the diameter nor materially decrease the strength of the conductor or the individual wire. No more than5 Y/ w X( L( i/ E
one of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given1 @6 k c& o: B- _) \% G; `! L
layer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor.
3 o1 k# m& n# |8 H6 [, XIn a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of
; e3 X0 K1 ~+ i* ]7 ~- D1 Rstranded members (primary groups), each member shall be considered equivalent to a solid wire, and as8 x% W2 r; G6 u% `3 N$ W& c
such, may be spliced as a unit. These joints shall not be any closer together than two lay lengths.
' l0 ^" H5 |; A: j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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