Low-voltage cable nuclear phase device

The invention discloses a low-voltage cable nuclear phase device which comprises a nuclear phase module, a communication module, a power supply, a first testing clamp and a second testing clamp. The power supply is used for power supply. The nuclear phase module comprises a testing interface circuit, a single chip microcomputer and an indicating device. The single chip microcomputer is connected with the testing interface circuit and the indicating device. The testing interface circuit is connected with a tested cable through the first testing clamp and the second testing clamp. The communication module comprises a transmitting device and a receiving device. The transmitting device is connected with the tested cable through the first testing clamp or the second testing clamp. The low-voltage cable nuclear phase device utilizes the low-voltage cable to achieve direct communication, enable persons at two ends to learn each other, and even in a working state, effective prompting is achieved, and errors are avoid