Cat 6 supports 10 gigabit ethernet only up to 164 feet of cable length.
Minimum length of cat6 cable.
Cat7 gets advertised for its 100 gbps speed but that will only work for distances up to 15 meters slightly over 49 feet.
The category 6 augmented cable standard or cat 6a was created to further improve the performance of cat 6 ethernet cables using cat 6a enables 10 gigabit ethernet data rates over a single cable run up to 328 feet.
For completeness sake 1000base cx states 0 1 m minimum length.
Copper also includes ancient coax cabling which does have minimum spacing of 2 5 m 10base5 or 0 5 m 10base2 but i don t think this was the question.
With utp you need to make sure the number of twists in the cable meet the specs.
The cable standard specifies performance of up to 250 mhz compared to 100 mhz for cat 5 and cat 5e.
Cat 6 has to meet more stringent specifications for crosstalk and system noise than cat 5 and cat 5e.
I have ordered 1 foot cat5 and cat6 cables for my patch pannes to make things easier.
But i do know you can order 12 inch 1 foot cables from a cable vendor provider.
There is no minimum cable length for twisted pair ethernet.
Although there is no minimum cable length specification for 1000baset any cable still has to meet various requirements like return loss near end crosstalk and the other specifications set forth in the ieee 802 3ab 1000base t standard and if the cable is too short there is a possibility that it might not meet some of these requirements.
Cat6 rj45 ends cablecreation 100 pack cat6 connector cat6 cat5e rj45 connector ethernet cable crimp connectors utp network plug for solid wire and standard cable transparent by cablecreation 12 59 12.
I do hope this helps.