What are the black lines and red lines in the power supply?
In electrical engineering, a phase distinction between three wire and three-phase four wire, three phase line, the red line for the line, blue line is zero, there is a change of protection (i.e. ground), three-phase, red, green, blue line, black zero line, and a dual color line for the protection of the zero line.
The red lines and black lines in the power supply represent the positive and the ground lines of the power supply respectively.The physical concept of a positive electrode, one of the higher potential (potential) in the power source, opposite to the negative.Circuit ground wire: in the circuit design, mainly to prevent interference and improve the radio wave radiation efficiency. The ground wire is widely used as the reference point of the potential and provides a reference potential for the whole circuit. At this point, the earth wire is not necessarily connected to the real earth, but is often connected to one of the input power lines (usually the zero line), and its potential is not related to the earth potential. When the whole circuit is designed, the voltage on the ground wire is 0V to unify the whole circuit potential.
The red line is positive, the black line is negative, the law more than in any circuit power supply circuit, wire electrode wire line is red, black line is negative or ground meaning, unless otherwise marked or instructions.
