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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 Joints0 {9 l1 K4 K' J: ]$ d
A joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase$ z& }; ^* Z) }. {5 O% P
the diameter nor materially decrease the strength of the conductor or the individual wire. No more than/ d7 z6 J% [+ ]9 i5 I; G1 `
one of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given9 B5 J, ^( a0 }6 o: h S
layer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor./ k; W3 I- N! E
In a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of
, z8 o; t% ~- T; n3 `0 {stranded members (primary groups), each member shall be considered equivalent to a solid wire, and as
6 [9 i1 ^: ?) T) B* ]; |# [+ e+ Isuch, may be spliced as a unit. These joints shall not be any closer together than two lay lengths.. v! m, z( E' 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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