Phone Line Wire Colors

All of the cat 5 wire i ve seen uses the following color coding.

Phone line wire colors. The kind of wire shown above has recently become obsolete. For all new telephone wiring projects you should use cat 5 cable. Most phone wire installed in the u s. The black and yellow pair is normally spare and available to install a second phone line.

In older telephone installations the phone cable typically has four wires inside. However if you only have one telephone line for your house you should use the same color pair for each new phone jack that you install. This is how the telephone wiring colour code looks wired. Telephone wiring color code for a home wall plate.

All telephones residential telephone jacks connectors etc that you can buy today follow this wiring convention. In either case the important. Telephone master socket wires. You will have a wide variety of telephone jacks to choose from but the wiring for a single line phone service will be standard.

This is the telephone wiring colour code for the nte5 bt master socket with the cable feeding extension sockets attached to the customer removable front plate. The four pair wire is capable of having four separate telephone lines at each jack location. The problem arrises when internal wiring using the 3rd bell wire causes interference this happens because the circuit is not ballanced the line pair coming in to your house is what we call twisted pair the two pairs cancel out any noise on the line when an extension is added internally the 3rd wire is required to make a lot of phones most modern dect phones don t need it ring hence the. The second pair has one black wire tip and one yellow wire ring.

Red green black and yellow. 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. For a single phone line only the green and red pair are normally used. Older telephone wiring was a basic cat 3 4 conductor or 2 pairs with red green black yellow.

The other color scheme is somewhat more complicated and is based on a primary color and a secondary color. During the second half of the 20th century is of the following kind. 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.