求助:线轴(UL355)去美国的和加拿大的有什么不同的要求?
求助:线轴(UL355)去美国的和加拿大的有什么不同的要求?一般的厂家都只有UL认证,但没有cUL认证,据说cUL的要求,或者说加拿大的要求与美国的有很大的不同.恳请大佬们帮助解释一下,两者的区别在哪里?如何已有UL认证,申请cUL的话要注意哪里东西?谢谢! 据我所了解的是加多一个ABNORMAL HEATING TEST(C22.2 No. 21-M95, Par. 6.16), 因为我也是接触线轴没多久，大家可以探讨一下嘛。。一下附上一个测试方法：
METHOD
One sample of Model _______________ was used for this test.
With no portion of the cord withdrawn, the sample was placed on four, single plies of cheesecloth.The cord reel was then wired to draw an overload current of _______ A, at rated voltage, on all conductors which normally carry current.The overload current was equal to 110 percent of the maximum current as limited by the .The was bypassed for this test.
[ ] The metal enclosure was grounded through a 3 A fuse.
Four, additional, single plies of cheesecloth were then used to cover the cord reel.The test was then allowed to continue for 7 h, or until the cheesecloth ignited .
RESULTS
[ ] The cheesecloth ignite.
[ ] The ground fuse open. 谢谢
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