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引用第3楼aha0827于2011-04-15 13:47发表的 :! r) B( ]! } t9 v
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UL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
7 x: X4 {+ J$ a2 w7 d/ M0 ~在UL60950-1中插孔极性标识是通过以下来规定的吗?% s' ~ I, o, N) [5 w
----Symbo for nature of supply , for d.c. only 0 V# `$ U. P; o
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UL60950-1 中是通过Symbo for nature of supply , for d.c. only规定的,而且还可以参考TableNAA.1(informative)1.7.1 * q; z Q: Y% p5 Y' r$ N1 |0 i
( j( i+ l6 v. h @1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c# U6 q. v, _9 M1 P% Q6 i
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* f; b' W! P9 m5 q! d- p2 Y2 Y, YUL1310 我刚才看到是2001年的,第五版在clause 51.6
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The polarity of a direct-current output shall be plainly marked, unless the unit is provided with a
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