ie rules1956

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INDIAN ELECTRICITY RULES 1956 The Indian Electricity Act, 1910 deals with the provisions relating to supply and use of electrical energy and the rights and obligations of persons licensed under part II of that act to supply energy. Section 35 - Advisory boards Under section 36A of the Act, a board called Central Electricity Board is constituted to exercise the powers conferred by Section 37.

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Page 1: IE RULES1956

INDIAN ELECTRICITY RULES 1956

The Indian Electricity Act, 1910 deals with the provisions relating to supply and use of electrical energy and the rights and obligations of persons licensed under part II of that act to supply energy.

Section 35 - Advisory boards

Under section 36A of the Act, a board called Central Electricity Board is constituted to exercise the powers conferred by Section 37.

Page 2: IE RULES1956

PART IVSection 36A –Central Electricity Board shall be

constituted to exercise the powers conferred by section 37

The board shall consist of

1. A chairman and five other members to be nominated by Central Government

2. One member to be nominated by government of each state

3. One member by railway board

4. One member by Chief Inspector of Mines

5. One member by ISI

Page 3: IE RULES1956

PART IV

Section 37 – Powers for Board to make rules

CEB may make the rules to regulate the generation, transmission, supply and use of energy.

In exercise of the powers conferred under the sections the Central Electricity Board frames the Indian Electricity Rules

Page 4: IE RULES1956

IE RULES • The rules regarding the safety in construction and

use of electrical installations / plants / equipments are framed by Central Electricity Board.

• The I.E. rules were first framed in 1922 and amended in 1937 and 1956.

Objective of I.E. Rules• To regulate the relation between the Electricity

Supplier and Consumer• To make the generation, transmission, distribution

and the use of electricity as safe as possible.

Page 5: IE RULES1956

INDIAN ELECTRICITY RULES 1956

• Chapter I – Rules 1 to 3 Preliminary• Chapter II – Rules 4 to 10 Inspectors• Chapter III – Rules 11 to 28 License• Chapter IV – Rules 29 to 46 General Safety

Precautions• Chapter V – Rules 47 to 59 General

conditions relating to supply and use of energy

• Chapter VI – Rules 60 to 62 Electric supply lines, systems and apparatus for low and medium voltages

Page 6: IE RULES1956

INDIAN ELECTRICITY RULES 1956• Chapter VII – Rules 63 to 73 Electric supply

lines, systems and apparatus for high and extra high voltages.

• Chapter VIII – Rules 74 to 93 Overhead lines• ChapterIX–Rules 94 to 108Electric Traction• Chapter X – Rules 109 to 132 Additional

precautions to be adopted in Mines and oil fields

• Chapter XI – Rules 133 to 143 Miscellaneous• Annexures XIV

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INDIAN ELECTRICITY RULES 1956Rule 1, 2 & 3 comes under the heading of preliminary.

Rule1–Short title and commencement.

Rule 2 – Definition – Act, ampere, authorised person, danger, earthing system, cable, span, supplier, system, lighting arrester.

Ampere – means a unit of electric current

Bare – means not covered with insulating material

Cable – means a length of insulated single conductor (solid / standard) or of two more such conductors each provided with its own insulation which are laid up together, such insulated conductors may or may not be provided with an overall mechanical protective covering.

Danger – means danger to health or danger to life or any part of body from shock, burn or other injury to persons or property or from fire or explosion, attendant upon the generation, transmission, transformations, conversion, distribution or use of energy.

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RULE 3 AUTHORISATIONSub rule 2A – No person shall be authorised to operate or

undertake operation and maintenance of any part or whole of generating station of capacity 100MWand above together with the associated substation unless he is adequately qualified and has successfully undergone the type of training specified in Annexure XVI.

1. Training may be arranged in his own institute.

2. This deals with details of training for skilled employees and fresh engineers.

CREATION OF INSTITUTE

Every training institute shall be established adjacent to a power station so as to facilitate familiarization and provide in plant training.

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INDIAN ELECTRICITY RULES 1956

Chapter III – deals with qualifications of inspectors, powers to the electrical inspectors.

Rule 5 Entry and Inspection.

Any Inspector may enter, inspect and examine any place.

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INDIAN ELECTRICITY RULES 1956

Chapter IV – General safety requirements

Rule 29 Construction, installation, protection, operation and maintenance of electric supply lines and apparatus.

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INDIAN ELECTRICITY RULES 1956

•All electric supply lines and apparatus shall be of sufficient ratings for powers, insulation and estimated fault current and sufficient mechanical strength for the duty which they may be required to perform under the environmental conditions of installations and shall be constructed, installed, protected, worked and maintained in such a manner as to ensure safety of personnel and property.

•The relevant code of practice of the BIS may be followed to carry out the purpose of this rule and in the event of any inconsistency the provisions of these rules shall prevail .

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INDIAN ELECTRICITY RULES 1956Rule 29 Where death is caused by electrocution on account of defective insulation of an electric pump and the earthing system, the principal of the Institution, its secretary and Chief Executive of the governing body of the institution where the accident takes place are all liable to prosecution.

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INDIAN ELECTRICITY RULES 1956

Rule 30 (4) The customer shall also ensure that the insulation under his control is maintained in a safe condition.

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Accidents & Main Reasons

Unauthorized persons working on lines / equipment

Working without using safety appliances

Working without obtaining proper line clear

 Working without proper instructions from superiors

Wrong instructions from person who received

the line clear

Negligence, carelessness, haste and overconfidence

Lack of knowledge on feeding arrangements

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Precautions to avoid accidents

• Obtaining proper line clear from all possible sources of supply shall be taken and the following precautions are to be taken.

•     1.   Till a L.C. is received from all sources every line or equipment shall be treated as live.

•     2.   Hang “Danger” boards at all strategic places to ensure safety at work spot

•       3.   Explain the area which is safe to work and ensure that every employee in your team has understood the same.

•    

Page 16: IE RULES1956

Precautions to avoid accidents(Contd.)

• 4.   Nominate one among the team exclusively to reap a close watch and ensure that every person in the team is safe.

•     5.   Earthing is to be provided on both sides of the work spot before proceeding with the work.

•     6.   All safety rules are to be followed till entire work is completed.

•     7.   Insulated earth rods with clamps shall be used and the person using the earth rods shall keep safe distance from earthing wires.

•     8.   Examine earth rods and every safety appliance before using

• 9.   No person shall be allowed work if he is under the influence of alcoholic drinks under inebriated condition.

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INDIAN ELECTRICITY RULES 1956

Rule 32 An indication of a permanent nature shall be provided by the owner of the earth neutral conductor to enable such conductor to be distinguished from any live conductor.

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INDIAN ELECTRICITY RULES 1956

Rule 33 Earthed terminal on consumer’s premises.

The consumer shall take all reasonable precautions to prevent mechanical damage to the earthed terminal and its lead belonging to the supplier.

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INDIAN ELECTRICITY RULES 1956

Rule 34 Accessibility of bare conductors where bare conductors are used in a building

The owner of such conductors shall

*Ensure that they are inaccessible

* Provide in readily accessibility position switches for rendering them dead whenever necessary.

Page 20: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 35 Danger Notices

The owner of every medium, high and extra high voltage installation shall affix permanently a Danger Notice in Hindi or English and the local language of the district with a sign of skull and bones (design as per ISS No.2551) on

a. Every motor, generator, transformer and other electrical plant and equipment together with apparatus used for controlling or regulating the same.

b. All supports of high and extra high voltage overhead lines which can be easily climbed upon without the aid of ladder or special apparatus.

Page 21: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 36

1. Handling of electric supply lines and apparatus Before any conductor or apparatus is handled adequate precaution shall be taken by earthing or other suitable means to discharge.

Every person who is working on an electric supply line or apparatus or both shall be provided with tools and devices such as gloves, rubber shoes, safety belts, ladders, earthing devices, helmets for protection him from mechanical or electrical injury.

Such tools and devices shall always be maintained in sound and efficient working condition.

2. No person shall work on any live electric supply line or apparatus and no person shall assist such person on such work, unless he is authorised in that behalf and takes the safety measures approved by the Inspector.

Page 22: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 37 supply to vehicles, cranes, etc.

Every person owning a vehicle, traveling crane or the like to which is energy supplied from an external source shall ensure that it is efficiently controlled by a suitable switch enabling all voltage to be cut off in one operation and the owner shall ensure rails if used are electrically continuous and earthed.

Page 23: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 38 cables for portable or transportable

apparatus

1. Flexible cables shall not be used for portable or transportable motors, generators, transformers, electric drills, electric sprays, welding sets, unless they are heavily insulated and adequately protected.

2. The cable shall be three core type and four core type for portable and transportable apparatus working on single phase and three phase supply respectively and wire meant for ground connection shall be easily identifiable.

Page 24: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 42 Accidental charge

The owners of all circuits and apparatus shall so arrange them that there shall be no danger of any part thereof becoming accidentally charged to any voltage beyond the limits of voltage for which they are intended

When AC and DC circuits are installed on the same support they shall be so arranged and protected that they shall not come into contact with each other when live.

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INDIAN ELECTRICITY RULES 1956Rule 43 Provisions applicable to protective equipment.

1. Fire buckets filled with clean dry sand ready for immediate use for extinguishing fire in addition to fire extinguishers (in all generating station, sub station and switching station).

2. The fire extinguishers shall be tested for satisfactory operation at least once in a year and record of such tests shall be maintained.

3. First aid boxes or cup boards marked and equipped with such contents as the State Government may specify shall be provided and maintained in every generating station, sub station and switching station so as to be readily accessible during all working

hours.

Page 26: IE RULES1956

INDIAN ELECTRICITY RULES 1956

Rule 44 Instructions for restoration of persons suffering from electric shock. Instructions in English or Hindi and local language for the restoration of persons suffering from electric shock.

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INDIAN ELECTRICITY RULES 1956Rule 44A Intimation of Accident

If any accident occurs in connection with the generation, transmission, supply or use of energy in or in connection with any part of the electric supply lines or other works of any person and the accident results is or is likely to have resulted is loss of human or animal, such person or any authorised person of the electricity board not below the rank of a J.E or equivalent shall send a telegraphic report to Inspector within 24 hours.

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INDIAN ELECTRICITY RULES 1956Rule 46A Periodical Inspection and testing of consumers’ installation

Where an installation is already connected to the supply system of the supplier, every such installation shall be periodically inspected and tested at intervals not exceeding five years either by the Inspector or by the supplier, in the case of installation in mines, oil fields and railways by the Central Government.

Page 29: IE RULES1956

INDIAN ELECTRICITY RULES 1956Chapter V – General condition relating to supply and use of energy

Rule 48 Precautions against leakage before connection

The supplier shall not connect supply unless he is reasonably satisfied that the connection will not at any time cause a leakage from that installation or apparatus of a magnitude detrimental to safety.

Compliance with this rule shall be checked by measuring the insulating resistance as provided below:

High voltage equipments shall have the IR value as stipulated in the relevant Indian Standard.

Page 30: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 50 supply and use of energy

The following controls of requisite capacity to carry and break the current after the point of commencement of supply as defined in Rule 58.

1. A linked switch with fuse or a CB for low and medium volt consumers.

2. CB for EHV consumer

Page 31: IE RULES1956

INDIAN ELECTRICITY RULES 19563. The supply of energy to each motor or a group

of motors or other apparatus meant for operating one particular machine in controlled by a suitable linked switch or a CB or an emergency tripping device placed in such a position as to cut off supply by the person incharge.

5.Adequate precautions shall be taken to ensure that no live parts are so exposed as to cause danger.

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INDIAN ELECTRICITY RULES 1956Rule 54 Declared voltage of supply to

consumer.

The variation shall not vary

1. Low and medium voltage by more than 6%

2. High voltage more than 6% on higher side, 9% on lower side

3. EHV, 10% on higher side and 12.5% on lower side .

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INDIAN ELECTRICITY RULES 1956

Rule 55 Declared frequency

A supplier shall not permit the frequency of an alternating current supply to vary from the declared frequency by more than 3%.

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INDIAN ELECTRICITY RULES 1956Chapter – VI Electric supply line, systems and apparatus

for low and medium voltage.

Rule 61 connecting with earth

The following provisions shall apply to the connection with earth of systems

1. Neutral conductor of a 3Ø 4 wire

2. Middle conductor of a 2Ø 3 wire system

shall be earthed by not less than two separate and distant connections with a minimum of two different earth electrode. The earth electrodes may be inter connected to reduce earth resistance

1. All earthing systems belonging to the supplier shall be tested for resistance on dry day during dry season not less than once every two years.

Page 35: IE RULES1956

INDIAN ELECTRICITY RULES 1956

Rule 61 Earth leakage protective devices.

The supply of energy to every electrical installation shall be controlled by an earth leakage protective device as to disconnect the supply instantly on the occurrence of earth fault or leakage of current (>5KW loads).

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INDIAN ELECTRICITY RULES 1956

Chapter VII Electric supply line, system apparatus for high and extra high voltage

Page 37: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 64A Additional provisions for use of energy at

high and extra high voltage

1. Inter locks

a. Isolator and Circuit Breaker

b. Isolator and earth switch

2. Protection : All the system and circuits shall be so protected as to automatically disconnect the supply under abnormal conditions.

• Overcurrent, Earthfault for machines

• Bucchholz relay 1000 KVA and above Tfrs

• Differential protection 10 MVA and above Tfrs,

1000 KVA and above generators with differential

Page 38: IE RULES1956

INDIAN ELECTRICITY RULES 1956

Rule 67 connection with earth

All non-current carrying metal parts associated with HV / EHV installations shall be effectively earthed to a grounding system or mat.

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INDIAN ELECTRICITY RULES 1956

Chapter VIII-OVERHEAD LINES

Rule 77 Clearance above ground of the lowest conductor

1. Over head line across the street

a. Low and medium voltage 5.8 mtr.

b. High voltage 6.1 mtr

2. Along the street

a. Low and medium voltage 5.5 mtr.

b. High voltage 5.8 mtr

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INDIAN ELECTRICITY RULES 1956Rule 78 clearance from building

Low voltage, medium voltage,

above roof 2.5 mtrs.

Horizontal clearance 1.2 mtrs.

High voltage upto 33 KV

above roof 3.7 mtrs.

Extra high voltage

above roof 3.7 mtr + 0.3 mtr for every addition of 33KV.

Page 41: IE RULES1956

CLEARANCE BETWEEN POWER AND CLEARANCE BETWEEN POWER AND TELECOM LINESTELECOM LINES

Minimum clearances between, lines of various voltages

LT lines (400 / 230 V) - 4 feet - 1.22 meter

11 kV lines - 6 feet - 1.83 meter

33 / 66 kV lines - 8 feet - 2.44 meter

132 kV lines - 10 feet - 3.05 meter

220 kV lines - 15 feet 4.88 meter

Note:-

Guard rings are to be provided at crossings of telecom lines with power lines upto 33 kV

Page 42: IE RULES1956

INDIAN ELECTRICITY RULES 1956Rule 88 Guarding

When overhead line crosses or is in proximity to another overhead line, guarding arrangements shall be provided so as to guard against the possibility of their coming in to contact with each other.

Every guard wire shall be actual breaking strength of not less than 635 kg.

Page 43: IE RULES1956

CASE STUDIES01. Water tap giving shock• One end of heater (neutral) is connected to the

pipe as return path. Pipe is not earthed. Say : 1000W heater, 200 Volts, R x 10 Ohm (Pipe line)

• voltage produced across the pipe 50V.

Remedy : heater must be connected to neutral and pipe should be earthed.

Page 44: IE RULES1956

02. Shock from wet wall

• The insulation of phase lines found damaged and surrounded by water spumes or moisture. This led to electrical leakage due to wall wet.

Remedy : Damaged wire to be replaced by healthy ones.

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03. Fan giving shock

• The flexible wire supplying electricity to a table fan in the house had cracked. The wire was touching the body of the fan.

Remedy : Proper inspection of cable and adequately insulate the wire or replace the wire.

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04. Fire in multi-storied Buildings• In a multi-storied office building, paper files were

stocked which were touching the wires in junction-box. Some local heat adequate to burn one paper was generated which resulted in fire which burnt the whole building.

Remedy : Proper stocking of the inflammable material away from the fire / heat.

• Fire detecting system should have been checked from time to time.

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05. Shock from motor pump• No bush was in the terminal box• with the result that wires were touching the edge of the terminal

box hole• after some time the insulation of wires were got damaged and

bare conductor came in touch with the metallic cover of the box• an operator accidentally touched the motor got fatal electric

shock• no earthing was provided for the motor

remedy• proper earthing of the motor could have saved the life as

earthing could have isolated the motor from supply in case of fault.

Page 48: IE RULES1956

6 steps safety methods1. Think - Be aware(thinking of personal, job oriented problems

while working-ticket to an accident)2. Understand the procedure(thoroughly familiar with all safety

procedures, knowledge of required steps and reasons)3. Follow the procedure4. Use appropriate safety equipment(nothing sadder than an

accident report which explains that the dead or injured worker was not wearing safety equipment.

5. Ask if you are unsure and do not assume(ignorance kills and injuries many people, encourage to ask questions and should be answered by a qualified person)

6. Do not answer if you do not know