Electrical Installation in Buildings
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This document discusses different types of conduit wiring for electrical installations in buildings. There are two main types: surface conduit wiring, where conduits are installed on the surface of walls using pipe hooks; and concealed conduit wiring, where conduits are hidden inside walls under plaster. Conduit wiring uses steel or PVC pipes (conduits) to run cables through for a professional, safe installation. Common conduit materials discussed are metallic steel conduits and non-metallic PVC conduits.
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Electrical power can be transmitted through overhead power lines or underground cables. Each method has benefits and drawbacks. Overhead lines are cheaper and easier to install but less safe, while underground cables are more expensive but safer. The choice depends on factors like voltage, cost, safety, and the application. Overhead lines are generally used for their lower cost and ability to transmit higher voltages, while underground cables are used where overhead lines present safety issues or cannot be implemented.
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Raceway wiring uses moldings to run wires along walls instead of stringing them through knobs, making it more expensive than knob and tube wiring. Cable trays support overhead or underfloor wiring while raceways mount on walls and protect wires inside finished buildings. Cable trays can support various wiring types and are usually metallic or non-metallic materials like aluminum, steel, or fiberglass chosen based on the environment.
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Electrical Installation in Buildings
- 1. Electrical Installation in Buildings PRESENTED BY Ramnath Panwar
- 2. Conduit Wiring There are two additional types of conduit wiring according to pipe installation: • Surface Conduit Wiring • Concealed Conduit Wiring
- 3. Conduit Wiring Surface Conduit Wiring: If conduits installed on roof or wall, It is known as surface conduit wiring. in this wiring method, they make holes on the surface of wall on equal distances and conduit is installed then with the help of rawal plugs.
- 4. Conduit Wiring Concealed Conduit Wiring: • If the conduits is hidden inside the wall slots with the help of plastering, it is called concealed conduit wiring. • In other words, the electrical wiring system inside wall, roof or floor with the help of plastic or metallic piping is called concealed conduit wiring. • obliviously, It is the most popular, beautiful, stronger and common electrical wiring system nowadays.
- 6. Conduit Wiring • In conduit wiring, steel tubes known as conduits are installed on the surface of walls by means of pipe hooks (in surface conduit wiring) or buried in walls under plaster and VIR or PVC cables are afterwards drawn by means of a GI wire of size if about 18SWG. • In Conduit wiring system, the conduits should be electrically continuous and connected to earth at some suitable points in case of steel conduit. • Conduit wiring is a professional way of wiring a building. Mostly PVC conduits are used in domestic wiring.
- 7. Conduit Wiring Types of Conduit: Following conduits are used in the conduit wiring systems, both concealed and surface conduit wiring, which are shown in the above image. • Metallic Conduit • Non-metallic conduit
- 8. Conduit Wiring Metallic Conduit: Metallic conduits are made of steel which are very strong but costly as well. Non-metallic conduit: A solid PVC conduit is used as non-metallic conduit now a days, which is flexible and easy to bend.
- 9. Comparison between Wiring Systems
- 10. Conduit Wiring • End • Chapter