CAT5 and 5e is 24ga. CAT6 is 23 ga. with a heavier insulation, twist and spacers MM ON Mon, July 28, 2014 11:08 am, Cowboy wrote: > > He was talking about CAT-5 stranded. > CAT-5 is, what, #32 wire, while the 66B is designed > for #24 solid. > > Not saying it can't be done, nor that some of us haven't done it.