when police are investigating and have a warrent
There are two types of wiretaps legal and illegal. An illegal wire tap can be done at any time by anyone in violation of several laws. A legal wiretap can be done once a court authorizes the wiretap to be performed by or at the request of law enforcement. The exception to this may be secret wiretaps placed by intelligence agencies to thwart terrorism.
Yes
With a valid warrant there are lots of ways. The simplest is just to place a listening device or recorder in parallel with the wire pair coming from the Telco. It can also be done at the Telco switch or on transmission lines or over the air by sophisticated equipment.
piggyback entry
Tapping the wire against the tube can disrupt any debris or material buildup on the wire, helping to clean it and potentially improve conductivity. It can also help dislodge any trapped air bubbles, enhancing the flow of liquid or gas through the tube.
Phone tapping may be good if done for the right reasons. The government may tap phone calls in order to prevent security threats from being carried out.
How a wire transfer is done? Can the person be traced through a receipt?
High voltage tests are done usually at the request of electrical engineers. When conductors are pulled into a conduit system, it is supposed to be done very carefully. In some instances this can not be done with out subjecting the conductors to mechanical stress. A high voltage test is applied to these conductors to make sure that the insulation factor of the wire has not been compromised. If the conductors do not pass the test, they have to be removed and new wire reinstalled.
Check around the reservior for a wire harness going to there. Try tapping on it.
Yes, if it involves a pattern defined as two or more instances.
There is a loose wire somewhere in the circuit - tapping the heater makes the wire complete the circuit !
Helmut Greulich has written: 'Spion in der Streichholzschachtel' -- subject(s): Eavesdropping, Wire-tapping