What is earth(ground) return current ?

Answer 1

5 g

Answer 2

It is the neutral of a circuit. Electricity flows , meaning it has a "from" and a "to", which we can call negative and positive, or visa versa depending on how you interpret electron hole theory.

Neutral is typically Earth ground, meaning it is referenced to earth, ZERO (0) potential or ground. Current flowing higher than ground potential is positive in voltage, and lower than ground potential, it is negative in voltage. Since current is measured in Amperes, it is the 'potential' or amount of energy that can sustain a certain voltage given the load.

Example: A DC power supply has a Ground wire, (Neutral) and a wire each for +12 and -12 volts. The potential return voltage between +12 and -12 is 24 volts, but between +12 and ground, it is 12 volts. The return ground current is the available sustainable energy the power supply provides that drives a load at a rated voltage.

Answer 3

Usually in a DC Power system one side of the battery or power supply is connected to the case or outside of equipment and grounded to earth ground also. So the ungrounded side of the battery provides current to the equipment and that power is returned through wires and the grounded case.

Details will depend on the exact system. Usually ground return current is used in telecommunications where a long time ago the telegraph actually used the earth ground for the return path and only one wire ran between telegraph stations.

Answer 4

Ground (electricity), in electrical engineering, something that is connected to the Earth or at the voltage defined as zero (in the U.S., called ground; in the UK, called earth)

when we talk about current, there is only AC / DC
where AC - is alternative current while DC - is directly current
AC can be reserve / forward (~) while DC forward