Furthermore, a subterranean electrical system is physically segregated from human populations, which means they are protected from the hazards connected with coming into touch with high-voltage lines, i.e., electrocution. Another significant advantage of an underground electrical system is that it is secure. Theft of electricity is very difficult because an underground circuit is not readily accessible to anyone who might want to steal it. In addition, an underground circuit is less visible than one that is above ground, which means that it tends to be used for private homes rather than public buildings.
The main disadvantage of an underground electrical system is its cost. Underground wiring is more expensive due to the need to drill holes in walls and floors to connect boxes to cables. However, if this expense is shared by many houses, it can become competitive with other types of systems.
Underground electrical systems were originally installed only in new construction because they are too expensive to renovate existing buildings. However, modern technology has made it possible to safely restore and reuse old infrastructure, which is why you now see these systems in historic districts across the country. There are two types of underground electrical systems: continuous conduit and discrete conduits. Both work on the same principle but use different methods for connecting wires to terminals in junction boxes. More information about these systems will be discussed in subsequent lessons.
Undergrounding is the replacement of overhead wires delivering electrical power or telecommunications with subterranean cables in civil engineering. The visual aspect of the environment without powerlines is another advantage of undergrounding. It also reduces the risk of fire from power lines and improves the quality of air near power stations.
Electrical power is transmitted to homes and businesses by generators which convert mechanical energy into electricity. In a factory setting, these generators are called "machinery drives". They are large, expensive, and usually run on diesel or natural gas engines. At a manufacturing plant, they can account for 20% or more of the total cost of electricity used there.
Most residential electricity is generated by coal-fired or nuclear plants high in the mountains, but some comes from solar cells on residential roofs. In general, remote areas without much traffic are better places for solar panels because they won't be blown down by wind storms.
The main advantage of generating your own power is that you can choose when to use it. If the sun isn't shining or the wind isn't blowing, the power will still come on. That's not possible with grid power where you need to use everything you generate even if you want to use it at different times. Also, if one generator breaks down all else remains functional.
The finest conductor is Earth. One of the reasons grounding helps to keep you safe is that the soil is such a good conductor of electricity, and excess energy will always go the route of least resistance. Grounding your electrical system allows it to travel somewhere other than into you, perhaps saving your life.
Another reason grounding is so important is because electricity can be dangerous if it gets inside your body. Any path that allows electricity to reach the ground first reduces the chance of it going any further.
Finally, grounding is important because it prevents electric shocks. When there is no longer a path from one side of a transformer to the other, electricity will want to go back to its normal flow, which is usually through the power line. To do this, it must go through something conductive, like a person. By tying each circuit to an identical point on the network, electricity cannot flow up one leg of a triangle and down the other unless it starts at the same place on all three wires. This ensures that if one section of wiring develops a problem (such as a broken wire), it does not spread to the other two sections of wiring.
In conclusion, grounding is important for your electrical system because it keeps you safe by preventing excess electricity from flowing into you, and it also helps prevent electric shocks by allowing electricity to flow back to its source.
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