ZX-A live cable identification instrument is used to identify A particular cable in the power cable setting, migration, maintenance, and fault treatment to identify A cable in the cable. It has the characteristics of accurate, fast, simple operation and wide application. It is an indispensable testing instrument in cable construction and maintenance. The electric/uncharged cable recognition device USES single-chip microcomputer technology to encode and power the transmitting signal at the transmitting end, which drives the large calibre calipers to coupling the signal to the live cable. The single chip in the receiver decodes and phase the received phase encoding signal. The target cable is identified from a large bundle of other cables based on the uniqueness of the signal phase characteristics on the target cable. It is a light compact, compact, lithium battery powered portable instrument. Suitable for all kinds of high and low voltage power cables.