AN OVERVIEW OF NATIONAL ELECTRICAL CODE (NEC) Prakash Bachani,Sc. E, BIS

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1 AN OVERVIEW OF NATIONAL ELECTRICAL CODE (NEC) Prakash Bachani,Sc. E, BIS

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3 Focus of the presentation Objectives of BIS Process of developing Standardization culture Involvement of all concerned in the process of Standardization through consensus Need for developing/improvement in Metering Standards Areas covered in Energy Metering Thrust on new areas as well as enhancement of the scope of the earlier version of Energy Meter Need to give wider coverage in key area of activities

4 Objectives Harmonious development of Standards Marking Quality Certification Provide new thrust to Standardization Quality Control To evolve a national strategy for according recognition to standards and integrating them with growth and development of production and exports

5 Structure for development of Standards

6 Standards are made with following in mind

7 COMMENTS NEW WORK ITEM FIRST DRAFT CIRCULATION TO COMMITTEE MEMBERS P-DRAFT COMMENTS CIRCULATION TO COMMITTEE MEMBERS MEETING WC DRAFT PUBLIC CIRCULATION (30 to 90 Days) COMMENTS MEETING ADOPTION -- DIVISION COUNCIL NATIONAL STANDARD F-DRAFT STANDARD

8 Electricity Statistics in India Total Installed Capacity Increased from 16,271 MW in 1971 to 249,488 MW as on Geographical Distribution Northern Region 26.54% Western Region 36.32% Southern Region 23.64% Eastern Region 12.29% North-Eastern Region 1.16

9 Electricity Statistics in India Total Installed Capacity Increased from 16,271 MW in 1971 to 249,488 MW as on Geographical Distribution Northern Region 26.54% Western Region 36.32% Southern Region 23.64% Eastern Region 12.29% North-Eastern Region 1.16

10 Electricity Generation Sources Thermal MW (69%) Hydro MW (16.3%) Nuclear MW (1.9%) New and Renewable MW (12.8%)

11 Power Stations under GSECL Name Type of Fuel Capacity (MW) Ukai Thermal Power Station Coal 850[2] Gandhinagar Thermal Power Station Coal 870 Wanakbori Thermal Power Station Coal 1470 Sikka Thermal Power Station Coal 240 Kutch Lignite Thermal Power Station Lignite 290 Dhuvaran Gas Based CCPP Gas 219[3] Utran Gas Based Power Station Gas 510 Ukai Hydro Power Station Hydro 300 Kadana Hydro Power Station Hydro 242 Panam Canal Mini Hydro Power StationHydro 2[4] GSECL is also serving Sardar Sarovar Narmada Nigam Limited Hydro-electric project by O&M contract.

12 NATIONAL ELECTRICAL CODE 2011 National Electrical Code is under the scope of Electrical Installations Sectional Committee, ETD 20 ETD 20 is one of the 37 committees under Electro Technical Division Council of Bureau of Indian Standards Members of the Committee are from CEA, CPWD, State Electrical Inspectorates, Installation designers, engineers and contractors Standards and Codes are prepared through a process of consultation, consensus and public comment

13 SCOPE OF ETD 20 To prepare standards for safety and related matters in designing, erection and maintenance of electrical installations from the point of view of safety and good practice that would, amongst other things, promote compatibility between such standards and those concerning the equipment installed. The work includes electrical installations in buildings for different occupancies and outdoor sites of temporary or permanent nature and also installations in the ships The standards to be prepared will not cover codes pertaining to individual equipment.

14 SCOPE OF NATIONAL ELECTRICAL CODE The National Electrical Code covers the following: a) Standard good practices for selection of various items of electrical equipment forming part of power systems; b) Recommendations concerning safety and related matter in the wiring of electrical installations of buildings or industrial structures, promoting compatibility between such recommendations and those concerning the equipment installed. c) General safety procedures and practices in electrical work; and d) Additional precautions to be taken for use of electrical equipment for special environmental conditions like explosive and active atmosphere.

15 NEC APPLIES TO: Standby generating plants Building substations Domestic dwellings Office buildings Shopping and commercial centres Institutions Recreation and other public premises Medical establishments

16 NEC APPLIES TO: Hotels Sports buildings Industrial premises Temporary and permanent outdoor installations Agricultural premises Installations in hazardous areas Solar Photovoltaic installations

17 NEC DOES NOT APPLY TO: Traction, motor vehicles, installations in rollingstock, on board-ships, aircraft or installations in underground mines Systems of distribution of energy to public Power generation and transmission for such systems Guidelines on the payment for electrical work done in installations

18 NEC CONTENTS Part 1 General and Common Aspects (20 Sections) Part 2 Electrical installations in stand by generating stations and captive substations Part 3 Electrical installations in non-industrial buildings (7 sections) Part 4 Electrical installations in industrial buildings Part 5 Outdoor installations ( 3 sections) Part 6 Electrical installations in agricultural premises Part 7 Electrical installations in Hazardous area Part 8 Solar Photovoltaic (PV) power supply systems

19 NATIONAL ELECTRICAL CODE Contains guidelines which can be adopted immediately Harmonized with corresponding IEC standards Code is intended to be advisory Code is not mandatory Should be adopted in interest of safety and economy Keep our electrical installation practices at par with the best international practices

20 Alternating current Winding- Delta Winding- Star Contactor Lamp Star-Delta Starter

21 Alphanumeric Notation, Graphical Symbols and Colours Supply ac systems Phase 1 L1 Red Phase 2 L2 Yellow Phase 3 L3 Blue Neutral N Black

22 TYPICAL WIRING FOR REMOTE /AUTO CONTROL

23 New areas/enhancement of the scope of some areas Solar Photovoltaic (PV) power supply systems Protection against voltage surge _ Electronic Items Capacitor bank- Energy efficiency Project on APFC Penal on LV side Wiring - Revision of IS 732 Wiring of Electric Installation under progress Lighting National Lighting Code (NLC)

24 Solar Photovoltaic (PV) In view of the importance of decentralized and distributed applications of solar photovoltaic energy and the potential of solar lighting systems following have been considered important: Solar water pumps and other solar power-based rural applications in changing the face of India s rural economy Growing usage of SPV in a number of products under various schemes of the MNRE Initiative by BIS Solar Photovoltaic Energy systems sectional committee, ETD 28 has taken up formulation of specific product standards covering the various products in vogue having SPV applications including Solar Lantern as well as Solar water pumps. The standards are already under development addressing LED based solar lanterns.

25 Solar Photovoltaic (PV) In view of the importance of decentralized and distributed applications of solar photovoltaic energy and the potential of solar lighting systems following have been considered important: Solar water pumps and other solar power-based rural applications in changing the face of India s rural economy Growing usage of SPV in a number of products under various schemes of the MNRE Initiative by BIS Solar Photovoltaic Energy systems sectional committee, ETD 28 has taken up formulation of specific product standards covering the various products in vogue having SPV applications including Solar Lantern as well as Solar water pumps. The standards are already under development addressing LED based solar lanterns.

26 BASIC STRUCTURE OF PV CELL

27 NATIONAL ELECTRICAL CODE Contains guidelines which can be adopted immediately Harmonized with corresponding IEC standards Code is intended to be advisory Code is not mandatory Should be adopted in interest of safety and economy Keep our electrical installation practices at par with the best international practices

28 Considered effort for brining awareness in key areas

29 NATIONAL ELECTRICAL CODE SP 30 : 2011 NATIONAL ELECTRICAL CODE Available at BIS Sales offices Available for online sale at BIS sales portal

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31 Thank You for your attention