fdocuments.in_ie-rules1956.ppt

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.

PART IV
Section 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

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

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.

• 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

• 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

Rule 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.

RULE 3 AUTHORISATION
Sub 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.

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.

Chapter IV – General safety requirements
Rule 29 Construction, installation,
protection, operation and maintenance of
electric supply lines and apparatus.

•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 .

Rule 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.

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

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

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.
•

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.

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.

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.

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.

Rule 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.

Rule 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.

Rule 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.

Rule 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.

Rule 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.

Rule 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.

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.

Rule 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.

Rule 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.

Chapter 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.

Rule 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

3. 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.

Rule 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 .

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%.

Chapter – 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.

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).

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

Rule 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

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.

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

Rule 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.

CLEARANCE BETWEEN POWER AND
TELECOM 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

Rule 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.

CASE STUDIES
01. 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.

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.

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.

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.

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.

6 steps safety methods
1. 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 procedure
4. 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

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fdocuments.in_ie-rules1956.ppt