No matter what the purposes of an excavation is at a particular site, it is highly important to know accurate location of underground assets or utilities such as gas pipes or electric cables. The exact placement of these buried items is not possible, but by the implementation of various detection machines you can get a fair approximation about it. The person above the ground has to mainly rely upon alternating current while looking for any signs regarding a buried wire connection. The magnetic field generated around the radius of the wire can leave traces which could be picked up by a high quality cable locator.
Once the cable is grounded, a circuit is completed which could help create a larger electromagnetic field which could be followed towards the end of the cable depending upon the type of conductor. The transmitter of the conductor radiates the electrical energy into the cable that needs to be detected, this way the excavator can reach towards the end of the utilities without having to go through failed attempts of burying the wrong area of land. Orbital-Underground-Service-Location Brisbane is your best bet if you want to get precise location about core infrastructure and want to have your construction or other related project completed according to projected targets.
Depending upon the frequency of electromagnetic waves passed through the ground, the location can also be found by finding out passive radiations emitted by cables. If the cables or wires are not coated with thick upper protective layers, a substantial amount of radio waves can be emitted due to the texture of the metallic utilities. Passive mode detection methods cannot be fully trusted as they are mainly implemented during initial site visits. In the absence of live current, most detectors are set to direct towards active signals.