Blue And White Phone Wires

Rear of phone jack with blue pair attached.

Blue and white phone wires.

This wiring diagram shows the standard way to wire telephone jacks. Red green black and yellow. The network interface device box is where the telephone wire from the phone company terminates and also where the phone wiring going into the house will connect to your landline phone. The ring wire is mostly the primary color with marks of the secondary color i e blue with white marks.

Now that you have your phone jack wiring complete you must now hook the telephone wire up to the connecting block. White is most. Connect the red wire or blue white to the red side and the green or white blue to the green side. Red wire green wire white blue wire blue white wire quick fix tip.

But looking deeper the color of the wires inside of the sheathing reveals that different colored wires serve different purposes. White and gray electrical wires. The national electrical code nec says that white or gray must be used for neutral conductors and that bare copper or green wires must be used as ground wires. The blue pair is connected as the primary telephone line.

If you re extending a line to a room or other part of the house you can use this type of cable or you can use newer category 3 or 5 cat 3 or cat 5 data cable which also has multiple wires but with a different color scheme. If you find wires in either of these colors you ve located the neutral wires. The primary colors are blue orange green brown and slate or gray if you re not a phone tech. The solid blue wire is the ring and gets connected to the red jack terminal.

Beyond that are general industry accepted rules about wire color that indicate their purpose. The tip wire is mostly the secondary color with marks of the primary color i e white with blue marks. The white and blue telephone wire. Again depending on the age of you home the conecting block could be as simple as two screws.

In older telephone installations the phone cable typically has four wires inside. All telephones residential telephone jacks connectors etc that you can buy today follow this wiring convention. A red and a green. Then blue wires are most often used as travelers for three or four way switches for instance if you have switches at the top and bottom of a staircase that control the same light that s a three way switch.

The single line set will use the following pairs depending on your cable. Fyi if purchase multiwire cable with 4 pair 8 colored wires for four lines the wiring convention is the same as above with line 3 using blue white and line 4 using orange brown. One pair of wires is used for one telephone line.