: not prepared ahead of time : made or done without preparation. 1  Two of my friends came by unexpectedly, and we had an impromptu little party in my kitchen. 2  He made an impromptu speech about honor and responsibility.
Go to the existing phone jack and unscrew the cover of the jack with the screwdriver. Locate the four wires and attach each wire to its matching color. Step 6. Go to the location of the new phone jack. Attach the telephone wire to the terminals inside the phone jack. They are named red, green, yellow, and black. Attach the corresponding color to its match.
And although these markings tell you what type and size of wire you have, the color of the wires will reveal that different color wires serve different purposes. The most common wire color code is black. Black wires are always used for hot wires and may feed a switch or outlet.Most important, Black Wires are never used as a Neutral or Ground connection. Red wires are also used for hot wires or switch legs.n instances such as this, the white HOT wire should be properly marked on the end with red or black electrical tape to show that it is being used for something other than a neutral. With the right knowledge about electrical wire color coding, every project should be a safe one!