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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
' r6 q' _7 {" }; G$ Y! uA joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase! S+ j; J& ?9 |( \5 R
the diameter nor materially decrease the strength of the conductor or the individual wire. No more than
" [2 Q+ p$ L' o; X# z5 Cone of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given
) V9 v) I9 X* V+ ?7 l' C1 C) alayer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor.! l) t0 A! \ F, j' N* j
In a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of" I# C6 d: C: P+ e* s. H/ N
stranded members (primary groups), each member shall be considered equivalent to a solid wire, and as
& p e! Y4 D) k: ^' b# Z- csuch, may be spliced as a unit. These joints shall not be any closer together than two lay lengths.
3 Q( K; c6 P* ^5 S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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