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Underground cable locations are not always obvious, which can lead to unwary diggers damaging cables or being electrocuted. Operations are more difficult since underground cables' high reactive power produces large charging currents, making voltage control more difficult. Large charging currents arise due to the higher capacitance from ...
The time domain reflectometer sends a pulse down the wire and then analyzes the returning reflected pulse to identify faults within the electrical wire. In historic submarine telegraph cables , sensitive galvanometers were used to measure fault currents; by testing at both ends of a faulted cable, the fault location could be isolated to within ...
Jul. 12—Question : Our neighborhood has underground wiring. In January several houses lost power. HECO responded by putting in above-ground temporary hookups. More than six months later those ...
Toronto Hydro pulled all employees off regular duty on the weekend of January 30, 2009 to deal with ongoing stray voltage problems in the city. [26] This came after as many as five children were shocked [27] though none suffered serious injury. The stray voltage problem had claimed the lives of two dogs in the previous few months. [28]
In this situation the video cable is grounded at the projector end to the home electrical system, and at the other end to the cable TV's ground, inducing a current through the cable which distorts the picture. The problem is best solved with an isolation transformer in the CATV RF feed, a feature included in some CATV box designs.
The conventionally used aid in cable fault testing and location is the cable test van. The van is installed with conventional cable measuring systems for quickly reaching the location of any cable fault. In 20 years that followed, over 2000 fault location vehicles were manufactured, more than half of which were intended for the former USSR.
A three phase electric circuit terminated with a pothead Crossarms with two three phase electric circuits terminated with potheads. A pothead is a type of insulated electrical terminal used for transitioning between overhead line and underground high-voltage cable or for connecting overhead wiring to equipment like transformers. [1]
Hire an electrician if you suspect there are deeper wiring problems to address. Photo: moodboard / Image Source / Getty Images Problems with the surface grading around your home could cause ...