Neutral and Earth are friends

Wires are amazing!!! Because that are the nerves for electricity to power your home's light bulb. In Single Phase there's Live,Neutral and Earth,Further more there's Red,Yellow,Blue,Neutral and Earth in three phase. But there's similarity in the wires especially in neutral and earth. So what are the similarities? We going to find out!!! 

If you want to know the similarities between neutral and earth, we should know the difference. Live wire is a current carrying conductor so it has potential also know as voltage. Neutral wire is carry current back to the source to make one complete loop. Earth wire is a protective wire that has zero potential means there's no current. Even you touch the earth wire, you won't feel get shock but don't try this at home.

The picture above shown is a 13A socket. From this picture we can know the socket receive the same current and goes back to the neutral and complete one loop. So this same current goes to the socket and back to the socket are same. This is called Balanced Current. This situation is normal for a single wired socket.What if the socket connect with two or more socket?

The picture above shown is 2 sockets connected in parallel. In parallel circuit the voltage will be the same but not the current. So the live carries 32A and goes back to neutral with 26A. Although it's complete one loop but this circuit carries Imbalance Current. This imbalance current need to dissipate. When comes to dissipate current the earth or grouding system kicks in to do this job.

In home and industrial distribution board, earth and neutral are connected isolatedly. but in serivce line (A.K.A Overhead Transmission Line) has ground wire or earth wire.These wire will dissipate the imbalance current in ground. In some cases this imbalance current will brought back to the substation and grounded there. So this will complete the circuit.

 The reason why neutral and earth are connected isolatedly because the earth conductor acts as protection to your electrical appliance by the help of RCCB. The RCCB will detect any earth leakage and immediately shut down the electrical supply. The leakage current will dissipate by earth copper tube.

 NEXT TIME WHEN THE RCCB TRIP AND SHUT THE ELECTRICAL SUPPLY TO YOUR HOUSE,ALWAYS THANKS TO THE EARTHING SYSTEM THAT ALWAYS READY TO PREVENT YOU FROM GETTING ROAST. I MEAN GET SHOCKED :p