What is the volt rating of the RED wire in a PSU?

The volt rating of the red wire in a power supply unit (PSU) is indeed +5V. This standard is part of the ATX PSU color coding conventions, where different colored wires indicate specific voltages that are supplied by the power supply. The red wire is specifically designated for +5V output, which is commonly used to power certain components in a computer system, like logic boards and some peripherals.

Understanding the voltage assignments in PSU wiring is crucial for building and troubleshooting computer systems. For example, the +3V typically does not have a dedicated wire color, while the +12V output uses yellow wires, and +24V is not a standard voltage found in typical PSU cables. Knowing that the red wire is +5V helps in ensuring proper power distribution and avoiding potential damage to components due to incorrect voltage levels. This knowledge is essential for anyone involved in computer systems servicing and repair.