Q&A Forum > > Reply To: When is it O.K., to use a CAT-6 Ethernet Patch Cable, where a CAT-5E, was ? Start a new discussion January 24, 2022 at 10:51 am #52097 Randall BlanchardParticipant @leftblank15 Is there a difference in resistance, between a CAT-5E, and a CAT-6, and can THAT difference, damage equipment ?