Electricity coming into our homes comes from power source wiring that goes past the KWH meter and MCB with the following sequences:
First two black wires (cables Twis) of electricity pylons will be laid around the house to our house, it consists of two wires of the phase / positive / neutral stun and cable / negative
Cable will be connected to the input phase KWH meter will then be connected to the input MCB, MCB wires from the phase will go into the house in the form of black NYM cable (generally) to 2.5 mm size can then be used by us / consumer.
Neutral or negative cable from the power source is connected to KWH meter terminal will then go into the house to be used.
In addition to the two wires coming from the power source there is also a special cable that is installed as a grounding / earthing, cable is connected directly to ground / earth by way of implanting metal pipe into the ground with a certain depth and then be connected by cable NYM yellow, this cable will be connected to each terminal outlet.
function grounding cable / grounding is to eliminate the small strum that normally found in the body of electronic equipment such as refrigerators, computers etc.. In addition, grounding serves to dispose of stray currents that can cause a spark at the outlet.
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