Red wires are also hot wires. The colors regulated by the national electrical code in the united states are standardized for safety.

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Black and red wires. Unlike most people i dont always use the product right away. Installgear 14 gauge awg 100ft speaker wire cable redblack. Electricians often use black red or blue wires to deliver electricity to a circuit from the main panel. Another is that the box is on a circuit three way switch loop. In most cases you see a red wire in an outlet box only in special circumstances. One is that the outlet is a 240 volt one which requires an extra hot wire.
It is very well made and will work great rewiring the speakers to my stereo in my old truck. Black wires are never used as ground or neutral wires and must always be treated with caution. The cable has a black wire which connects directly to the circuit and a red wire which connects to the switch. Black wires are always hot wires meaning that they carry electricity. Black black wires signifies neutral wire in electric circuit. It is he live wire and is positive.
Red red wire signifies the phase in electric circuit. In standard 120 volt wiring the hot wire is black but it can also be red. The ground wire also connects to the switch but the white wire gets spliced to the circuit neutral wire and bypasses the switch. They may use other colors for switch wiring such as yellow or tan. The standard way to power a split tab outlet is to run a three conductor cable to a wall switch. This is 14 gauge wire black and red.