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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+ a( l1 i8 ?) F5 C+ C
A joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase* ~5 O# Q0 v1 m# j2 Y* Y* a
the diameter nor materially decrease the strength of the conductor or the individual wire. No more than
, n! B }9 O9 _/ pone of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given
, @3 d7 z' F/ G4 \layer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor.
0 D& _) l. Y NIn a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of# {, L+ z! @2 k) p) |" k
stranded members (primary groups), each member shall be considered equivalent to a solid wire, and as
9 h" X3 F; ^( } G: s# x8 k# ]such, may be spliced as a unit. These joints shall not be any closer together than two lay lengths.* i+ F, \& z5 Q) ^7 h! g+ @8 M2 T
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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