不需要

應該要

C14 的inlet ,PE pin 如與output地端直接相連,這時算1類還是2類設備?這時PE pin與L,N之間要求基本絕緣還是加強絕緣?如果PE pin 與L,N接了y-cap,pe pin 與輸出地相連﹐這又如何?

只要有保護性接地,就算是I類產品,這時,接地與L/N之間只需要基本絕緣就行.

First, You shall make it clear that the creepage and clearance are depend on the working voltage, Of cource, you shall keep the rule before fuse (include the creepage of fuse).