Know the Wire Color Codes

Electricity has become one of the major parts of everyone’s life. Everything will come to a standstill now if electricity disappears. Such has become the importance of electricity in our lives. In a normal set up, electricity will be supplied to building at one point through main lines and then distributed to individual homes or offices through a set of wires. These wirings are a bit complicated and can cause number of certain issues. If the wiring is not done properly it can cause potential harm. Hence it is always good to know the different kinds of wires used which can be easily identified by color codes. These color coding standards vary across different countries. The color codes are decided by national or international organizations like National Electric Code. In India, there is RGB (Red, Green, Black) Scheme.

Red: Red color refers to live wire. These wires are used in switches that balance the load. This wire cannot be mixed or connected with other red wire or even black wire.
Green: Green refers to grounding or earthing wire. It is attached to appliances like AC, TV, Microwave etc. and connected to junction box. These wires also cannot be connected to any other wire type.
Black: Black wires refer to neutral wires or voltage transmission wires. They carry unbalanced load. These can be connected to other wires except for black wires.
There are other emerging color codes that electricians are using like BBG (Brown, Blue and Green) Scheme but RGB still remains the most popular one.
It is always good to know the basics of any subject so that next time if there is any issue related to wiring you can at least understand it and try to fix it.


Electricity Journey

What will happen if electricity disappears all of a sudden? Scary thought, right? Electricity has become of so much importance in our lives that its simple thought of absence disturbs us. This world will come to a standstill now if this electricity doesn’t reach us. Ever wondered how this generated electricity reaches us? This brief article will help you to know that.
The entire process is divided into three phases namely Production, Transmission and Distribution. At the production stage, electricity is generated at power plants then in the transmission phase, it is transmitted through high transmission lines to various areas and finally in the distribution phase, it is transmitted to houses and offices. The detail process is as follows:
• Electricity is generated at generating stations. These stations can use wind, coal, natural gas or water.
• The generated current is sent to transformers to increase the voltage so that it can travel longer distances. It is sent to various regions through high-voltage transmission lines.
• It is then sent to a substation where power is lowered so that it can be sent to smaller power lines.
• It then travels through distribution lines to your neighborhood. Smaller transformers further reduce the voltage to make it safe to use in homes. These small transformers are normally mounted on poles that we see on streets.
• It connects to houses and passes through meter that measures how much electricity a family uses.
• This electricity goes to the service panel in the basement where fuses protect the wires inside the house from overloading.

Such is the long journey of electricity but for us it is just a button away! Technology rocks!


Stay Safe from Electric Shocks

Like water and metal even human body is a good conductor of electricity. Hence it is very much essential to keep our body away from direct contact with electricity. When a body comes in contact with electricity, it passes through body causing a severe ELECTRIC SHOCK. This can burn both internal and external tissue and can cause severe organ damage.
Various things that can cause electric shocks are: power lines, lightning, electric machinery, household appliances, electrical outlets etc. However, shocks from home appliances are less severe as compared to other sources. Apart from the source, there are few other things that determine the severity of shock. They are: voltage levels, amount of time in contact with source, electricity’s path through body and even the type of current (Alternating current is more damaging than the direct current).
If you see someone receiving a shock, here are some quick do’s and don’ts that may save the person’s life.
• Don’t touch the person who has received shock.
• Turn off the main source of electricity immediately. If you can’t, move the source of electricity or person away from each other using a non-conducting object like wood. (DO NOT use any object that is wet or metal based.)
• Call the emergency number or doctor immediately if the person has trouble breathing, loses consciousness or has a fast heartbeat.
• Constantly keep a check on the person’s breathing and pulse rate.
• Try to keep the person warm as long as possible.
Keep these things in mind and use them if you see a person being shocked. It will help you save somebody’s life.


A. Lalitha – First Women Engineer

At the outset, Shree engineering wishes all the ladies a very Happy International Womens Day. Let us a take a pledge today to honor and respect every women around us for they are special, powerful and unique. We take this occasion to celebrate and appreciate all the amazing work that every women has done in this world. Women today have proved themselves in every field may it be arts, sports or even technology. When it comes to technology, rather engineering it was thougth to be a male dominated society. Long back, no woman was given admission in engineering colleges in India for it was thought that this is not their cup of tea. However, there was one woman who decided to break this stereotype. She went on to create history and became the FIRST WOMAN ENGINEER from India. She could have decided to walk on the same path as many other women at that time, but chose to break the barriers of the society. She is A.Lalitha. She was born on August 27, 1919 in Chennai and was one of the eight children in the family. She got married at the age of 15, gave birth to a daugher at the age of 18. And unfortunately at the age of 18 she became a mother plus a widow. Luckily, her parents were forward thinking and hence decided that she would continue her education even after such a major blow. She decided to choose engineering and got into College of Engineering, Madras. Being the only woman in the campus, she was subjected to stares and glares from other men in the society. Inspite of that, she completed her engineering in electrical field in 1944. She hardly new that she was going to create such a great history and opened gates for some brilliant brains in the years to come. Lalitha became a full member of the Women’s Engineering Society of London in 1965 and became the representative in India for the Second ICWES in England in July 1967. After working for over 30 years, Lalitha retired in 1977, and just two short years later, she died on October 12, 1979. Though her journey had come to an end, but the brave steps taken by her in that time should be really appreciated.
We salute her and sincerely thank her for opening the gates of engineering to women forever.


Wireless Electricity

Yes! You read that right. Even electricity can be transmitted without using wires. ‘Wireless Electricity’ is relatively a new branch of technology that is growing at a rapid pace. Although this concept is getting attention now-a-days, its first demonstration was given long ago in 1899 by Nikola Tesla. He demonstrated this concept by powering some fluorescent lamps located twenty-five miles from their power source without using wires. But at that time it was cheaper to use wired transmission method. Because of financial resource constraints at that time, he could not develop a practical and efficient wireless transmission model. But today with lot of resource backing available, companies like WiTricity Corporation are working on this concept. But ever wondered how does this concept work? Here, in this short article we give a brief idea on this magic happens. Stay Tuned!

According to the Wireless Power Consortium, “Wireless charging, also known as inductive charging is based on some simple principles. The technology requires two coils: a transmitter and a receiver. An alternating current is passed through the transmitter coil, generating a magnetic field. This, in turn, induces a voltage in the receiver coil; this can be used to power a mobile device or charge a battery.”

To explain in detail, whenever an electric current is passed through a wire, a circular magnetic field is developed around it. And if the wire is coiled, this field becomes even stronger. Now, when a second coil of wire that does not possess an electric current is placed in that magnetic field, the electric current from first wire will travel through magnetic field and start running through the second wire. This is known as inductive coupling.

There are some applications that you might be aware of today like electric toothbrush or wireless charger but this technology is surely going to do wonders in the years to come.

Safety First

You might have read or heard about many accidents that happened while people were carelessly working with electricity. Many people have lost their lives in these accidents and some become severely injured. Seriously, electricity is not the thing to play with. Proper precautions must be taken while one is working with electricity like electrical wirings or electrical equipment. Wondering how can we keep safe from electrical hazards? Then, you are at the right place. Read the following quick tips and keep yourself safe.
No Water. This is the first and the foremost care that one should take while working with electricity. Water being a good conductor of electricity, one should never work with wet hands with electricity.
Do not use equipment when the wire is damaged like broken insulation and even when the plug point is damaged.
Turn off mains. Whenever there is any repairing work of wiring or equipment makes sure the main supply is turned off.
Always use appropriate insulated rubber gloves while working on any electrical equipment as rubber is a bad conductor of electricity.
Never use steel or any metal based ladder while working with electricity. Instead, use a wooden based ladder.
In addition to this, one must also the wire code used in the country for example India follows RGB color scheme. Knowing this will definitely help a person to act promptly in case of emergencies.
Let’s us all make sure that we stay safe from these electrical hazards by following these points and also keep our loved ones away from this hazard.

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