Universal low-voltage busbar and assembling method thereof

The invention discloses a universal low-voltage busbar and an assembling method thereof. The busbar is included. The busbar is arranged in a connecting groove; the connecting groove is a U-shaped connecting groove; two ends of the busbar extend out of two ends of the U-shaped connecting groove; a cover plate is arranged at the opening of the connecting groove; an upper through hole is formed in the cover plate; the busbar is provided with a middle through hole; a lower through hole is formed in a bottom end of the U-shaped connecting groove; the upper through hole corresponds to the lower through hole; a fastening bolt is arranged on the upper through hole; the fastening bolt connect the cover plate, the busbar and the connecting groove together through the upper through hole, the middle through hole and the lower through hole; and standard connectors are arranged at the two ends of the busbar, three inlet and outlet ports are formed in one end, close to the busbar, of each standard connector, a cable connect