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Wiring system building services
- 1. COURSE NAME –BUILDING SERVICES COURSE CODE – ARC 310 WIRING SYSTEM SUBMITTED TO :- AR. KIRANPREET KAUR SUBMITTED BY :- MANISHA BISHT B. ARCH 4TH SEM
- 2. WIRING SYSTEM • Electricalwiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure. Wiring is subject to safety standards for design and installation. • Electrical wiring is the electrical power distribution through the wires in a perfect manner for economic use of wiring conductors inside a room or building with better load control.
- 3. SYSTEM OF WIRING •State electricity board provide electric supply up to a point outside the consumer premises. From this point consumer take the connection to his main board . Insulated electrical wires will be taken out to various places in the permises to supply power to different type of loads like lights , fans , refrigerators , room coolers , heaters, etc.
- 4. Points to beconsidered for selection of wiring • Initial cost: It should be economical. • Durability: It must be able to withstand wear and tear due to weather. • Safety from fire: It should be free from risk of fire as far as possible. • Mechanical protection: It must provide mechanical protection to the cables. • Permanency : The wiring must not be affected by the action of weather, fumes, dampness, chemical etc. • Appearance: The appearance should be good enough to view. • Accessibility: It should be easy to extend or repair the wiring. • Life: The system should have good life time. • Maintenance cost: It should be low.
- 5. Wiring types accordingto need Industrial wiring Domestic wiring Commercial wiring wiring
- 6. DifferentTypesofElectrical WiringSystems 3. CTSor TRS or PVC sheath wiring 2. Wooden casing and capping wiring 5. Conduit wiring 4. Lead sheathed or metal sheathed wiring 1. Cleat wiring
- 7. CLEAT WIRING • Inthis system of internal wiring the cables used either VIR or PVC types. • The cables are held by porcelain cleats about 6 mm above the walls or ceiling. • It is a temporary wiring system, therefore making it unsuitable for domestic premises. • It is the oldest wiring. • It permitted on systems up to 440V or 600V. • Its life time is approximately 5 Years. • This system is not used in damp walls or ceilings.
- 8. Wooden casing and cappingwiring • The casing consists of V-shaped grooves (usually two to hold the cables of opposite polarity in different groves). • It is covered at the top by means of rectangular strip of wood, known as capping of same width as that of casing. • The cables used in this type of wiring are either VIR or PVC or any approved insulated cables.
- 9. CTS or TRSor PVC Sheath wiring • In this kind of wiring Single core or double core or three core TRS cables with a circular oval shape cables are used. Mostly, single core cables are preferred. • TRS cables are chemical proof, water proof, steam proof, but are slightly affected by lubricating oil. • It is cheaper than other types of wiring except cleat wiring.
- 10. Lead sheathed ormetal sheathed wiring • This type of wiring employs conductors insulated with VIR and is covered with an outer sheath of lead-aluminum alloy containing about 95% lead. • This metal sheath gives protection to the cable from mechanical injury, dampness and atmospheric corrosion. • Its life is long earth continuity is maintained throughout. • It is can be used in situations exposed to rain sun provided no joint is exposed.
- 11. Conduit wiring • Conduitwiring is a system where the cables are enclosed in metal or plastic tubes . • The conductors have insulation which is rated at the voltage required but gives no mechanical protection. • Surface conduit wiring is used in industries to connect the heavy motors. • Concealed wiring is the most popular and common method of wiring the residential buildings.
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