Which color is commonly used to indicate positive or hot conductors in DC circuits?

Which color is commonly used to indicate positive or hot conductors in DC circuits?

• A. Red is commonly used for positive/hot conductors.
• B. Black is commonly used for positive/hot conductors.
• C. Green is commonly used for positive/hot conductors.
• D. Blue is commonly used for positive/hot conductors.

Answer: (A)

Red is commonly used to indicate the positive or hot conductor in DC circuits. This convention helps you quickly identify the power supply line (V+) versus the return path. In most electronics and automotive wiring, red carries the positive potential, while black is used for the negative or ground. Green is usually reserved for earth ground in many standards, and blue isn’t the standard color for positive in DC. So red is the go-to color for positive/hot.

Red is commonly used to indicate the positive or hot conductor in DC circuits. This convention helps you quickly identify the power supply line (V+) versus the return path. In most electronics and automotive wiring, red carries the positive potential, while black is used for the negative or ground. Green is usually reserved for earth ground in many standards, and blue isn’t the standard color for positive in DC. So red is the go-to color for positive/hot.