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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
4 n4 ]8 R* a N" f( D4 _! pA joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase9 e0 q, }8 q$ i" r5 }0 B7 ~3 L
the diameter nor materially decrease the strength of the conductor or the individual wire. No more than
# C( X0 [: B# xone of the wires in a stranded conductor of 19 wires or less, or more than one of the wires in any given
5 R% h- Y& v4 ? U' `4 B% A' Z! Elayer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor.: t: O' J) R& U( r. F
In a rope-lay-stranded conductor, which consists of a central core surrounded by one or more layers of
3 m$ c8 E+ h! Ystranded members (primary groups), each member shall be considered equivalent to a solid wire, and as I! ^7 N3 i% N' t( L) K
such, may be spliced as a unit. These joints shall not be any closer together than two lay lengths./ z# s3 o( J& L, m* q2 p# r% |
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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