Cat 5 Color Code Wiring Diagram | House Electrical Wiring Cat 5 Color Code Wiring Diagram. In order to make crossover cable you have to keep one end of cable as 568A or 568B and second one the opposite to that. For instance, if you are using 568A on one end than second end must be 568B. For straight through cable both end of cables must follow same standard. Straight through cable Wiring Diagram Color Code - Cat 5 wwwwiringdiagram››cat 6 wiring›rj45 wiringStraight through cable Wiring Diagram Color Code. Here a ethernet RJ45 Straight cable Wiring Diagram witch color code category 5,6,7 a Straight Through Cables are one of the most common type of patch cables used in network world these days. These Straight Through Cables can be made using UTP (unshielded twisted pair) cables.