AN OVERVIEW OF NATIONAL ELECTRICAL CODE...

AN OVERVIEW

OF

NATIONAL ELECTRICAL CODE

(NEC)

Prakash Bachani,Sc. E, BIS

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

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

Structure for development of Standards

Standards are made with following in mind

FIRST

DRAFT

CIRCULATION

TO

COMMITTEE

MEMBERS

P-DRAFT

COMMENTS

CIRCULATION

TO

COMMITTEE

MEMBERS

COMMENTS

PUBLIC

CIRCULATION

(30 to 90 Days)

COMMENTS

NATIONAL

STANDARD

NEW

WORK

ITEM

MEETING WC

DRAFT

ADOPTION -- DIVISION

COUNCIL

F-DRAFT

STANDARD

MEETING

Electricity Statistics in India

Total Installed Capacity – Increased from 16,271 MW in 1971 to 249,488 MW as on 30-06-2014.

Geographical Distribution

Northern Region – 26.54%

Western Region – 36.32%

Southern Region – 23.64%

Eastern Region – 12.29%

North-Eastern Region – 1.16

Electricity Generation Sources

Thermal – 172286.09MW (69%)

Hydro – 40730.09MW (16.3%)

Nuclear – 4780.00MW (1.9%)

New and Renewable – 31692.14MW (12.8%)

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.

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

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.

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.

NEC APPLIES TO:

Standby generating plants

Building substations

Domestic dwellings

Office buildings

Shopping and commercial centres

Institutions

Recreation and other public premises

Medical establishments

NEC APPLIES TO:

Hotels

Sports buildings

Industrial premises

Temporary and permanent outdoor installations

Agricultural premises

Installations in hazardous areas

Solar Photovoltaic installations

NEC DOES NOT APPLY TO:

Traction, motor vehicles, installations in rolling-

stock, 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

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

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

Alternating current

Winding- Delta

Winding- Star

Contactor

Lamp

Star-Delta Starter

Alphanumeric Notation, Graphical

Symbols and Colours

Supply ac systems

Phase 1 L1 Red

Phase 2 L2 Yellow

Phase 3 L3 Blue

Neutral N Black

TYPICAL WIRING FOR REMOTE

/AUTO CONTROL

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)

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.

BASIC STRUCTURE OF PV CELL


• 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

Considered effort for brining awareness in key areas


SP 30 : 2011 NATIONAL ELECTRICAL CODE

Available at BIS Sales offices

Available for online sale at BIS sales portal

www.standardsbis.in

Thank You

for your

attention

AN OVERVIEW OF NATIONAL ELECTRICAL CODE...

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