Which type of cable measuring device should not come in contact with the cable?

The type of cable measuring device that should not come in contact with the cable is a cable height meter. This device is specifically designed to measure the height or clearance of overhead cables without needing to physically touch or interfere with them. This is particularly important in situations where safety and the integrity of the cable are concerned, such as power lines or communication cables, making contact risky for both the device itself and the surrounding environment.

A voltage probe and a current clamp, on the other hand, are designed to measure electrical properties while making contact with the circuit or the wire. A voltage probe typically needs to connect directly to the points of voltage measurement, while a current clamp can encircle a conductor to measure the current flowing through it without disrupting the circuit it is measuring.

In summary, the cable height meter specializes in measuring overhead cables without contact, ensuring both safety and accurate measurements, while other devices function effectively with direct contact to gather their necessary data.