NCCER 33108 Limited-Energy Cabling Practice Test

In a four-pair UTP cable, each pair uses a solid color and its matching white-striped wire. The first pair is the blue pair, so its two conductors are blue and white (the white wire has a blue stripe). That’s why the ring color for the first pair is described as blue and white. The other pairs follow the same pattern with orange/white-orange, green/white-green, and brown/white-brown.