Generally, there is one more capacitor line than four wires, and the capacitor line of five wires is two alone, and the capacitor line of four wires is only one and the other one is connected with the neutral wire. For example, the connection of four wires :(the color may be different, the mark is the same) Red (H) connects to the fast speed black (L) connects to the slow speed blue (N) connects to the neutral line Yellow connects to the capacitor, and the other end of the capacitor connects to the neutral line. The connection of five wires: (color may be different, the mark is the same) Red (H) to the fast black (L) to the slow blue (N) to the neutral line Yellow and white to the capacitor! Capacitors are labeled with 4UF\/500V, and there are also 5UF\/500V.