Underground service locators, and other types of cable locating equipment, are primarily used to check whether a cable is working or not. When people are looking for cables, they’re usually trying to discover the type of connection the cable has, which can be either intended or unintended. If it’s an intended connection, the cable locating equipment will confirm it. Read more: http://www.bluekoala.com.au/cable-locating-equipment-benefits/
Source: https://www.test-equipment.com.au/cable-locators/