GENERAL CONDITIONS RELATING TO SUPPLY AND USE OF ENERGY
Rule-47: Testing of consumer’s installation:
(1) Upon receipt of an
application for a new or additional supply of energy and before connecting the
supply or reconnecting the same after a period of six months, the supplier
shall inspect and test the applicants’ installation.
The supplier shall maintain a
record of test results obtained at each supply point to a consumer, in a form
to be approved by the Inspector.
(2) If as a result of such
inspection and test, the supplier is satisfied that the installation is likely
to constitute danger, he shall serve on the applicant a notice in writing
requiring him to make such modifications as are necessary to render the
installation safe. The supplier may refuse to connect or reconnect the supply
until the required modifications have been completed and he has been notified
by the applicant.
Rule-47A: 1[Installation and
Testing of Generating Units- Where any consumer or occupier installs a
generating plant, he shall give a thirty days’ notice of his intention to
commission the plant to the supplier as well as the Inspector.
Provided that no consumer or
occupier shall commission his generating plant of a capacity exceeding 10KW
without the approval in writing of the Inspector]
Rule-48: Precautions against leakage before connection:
(l) 2[The supplier shall not
connect with his works the installation or apparatus on the premises of any
applicant for supply unless he is reasonably satisfied that the connection will
not at the time of making the connection cause a leakage from that installation
or apparatus of a magnitude detrimental to safety. Compliance with this rule
shall be checked by measuring the insulation resistance as provided below:
(i) High Voltage
Equipment installations:
(a) High
Voltage equipment shall have the IR value as stipulated in the relevant Indian
Standard.
(b) At a
pressure of 1000 V applied between each live conductor and earth for a period
of one minute the insulation resistance of HV installations shall be at least 1
Mega ohm or as specified by the 1[Bureau of Indian Standards] from time to
time.
(ii) Medium
and Low Voltage Installations:
At a pressure
of 500 V applied between each live conductor and earth for a period of one
minute, the insulation resistance of medium and low voltage installations shall
be at least 1 Mega ohm or as specified by the 3[Bureau of Indian
Standards] from time to time.]
(2) If the supplier declines to
make a connection under the provisions of sub-rule (1), he shall serve upon the
applicant a notice in writing stating his reason for so declining.
Rule-49: Leakage on consumer’s premises:
(1) If the Inspector or any
officer appointed to assist the Inspector and authorised under sub-rule (2) of
rule 4A or the supplier had reason to believe that there is in the system of a
consumer leakage which is likely to affect injuriously the use of energy by the
supplier or by other persons, or which is likely to cause danger, he may give
the consumer reasonable notice in writing that he desires to inspect and test
the consumer’s installation.
(2) If on such notice being
given:
(a) The
consumer does not give all reasonable facilities for inspection and testing of
his installation, or
(b) 4[When
an insulation resistance at the consumer’s installation is so low as to prevent
safe use of energy.] The supplier may, and if directed so to do by the
Inspector shall discontinue the supply of energy to the installation but only
after giving to the consumer 48 hours’ notice in writing of disconnection of
supply and shall not recommence the supply until he or the Inspector is
satisfied that the cause of the leakage has been removed.]
Rule-50: 5[Supply and use of energy:
(1) The energy shall not be
supplied, transformed, converted or used or continued to be supplied,
transformed, converted or used unless provisions as set out below are observed:
(a) The
following controls of requisite capacity to carry and break the current 6[are
placed] after the point of commencement of supply as defined in rule 58 so as
to be readily accessible and capable of being easily operated to completely
isolate the supply to the installation such equipment being in addition to any
equipment installed for controlling individual circuits or apparatus:
(i) A linked
switch with fuse(s) or a circuit breaker by low and medium voltage consumers.
(ii) A linked
switch with fuse(s) or a circuit breaker by HV consumers having aggregate
installed transformer/apparatus capacity up to 1000 KVA to be supplied at
voltage upto 11 KV and 2500 KVA at higher -voltages (above 11 KV and not
exceeding 33 KV).
(iii) A
circuit breaker by HV consumers having an aggregate installed transformer/apparatus
capacity above 1000 KVA and supplied at 11 KV and above 2500 KVA supplied at
higher voltages (above 11 KV and not exceeding 33 KV).
(iv) A circuit
breaker by EHV consumer;
Provided that
where the point of commencement of supply and the consumer apparatus are near
each other one linked switch with fuse(s) or circuit breaker near the point of
commencement of supply as required by this clause shall be considered
sufficient for the purpose of this rule;
(b) In case of
every transformer the following shall be provided:
(i) On primary
side for transformers a linked switches with fuse(s) or circuit breaker of
adequate capacity:
Provided that
the linked switch on the primary side of the transformer may be of such
capacity as to carry the full load current and to break only the magnetising
current of the transformer:
Provided
further that for transformers of capacity 5000 KVA and above a circuit breaker
shall be provided:
Provided
further that the provision of linked switch on the primary side of the
transformer shall not apply to the unit auxiliary transformer of the generator
(ii) On the
secondary side of transformers of capacity 100 KVA and above transforming HV to
MV or LV, a linked switch with fuse(s) or circuit breaker of adequate capacity
capable of carrying and breaking full load current and for transformers
transforming HV to EHV as the case may be, a circuit breaker:
Provided that
where the transformer capacity exceeds 630 KVA a circuit breaker of adequate
capacity shall be installed on the secondary side;
(c) Except in
the case of composite control gear designed as a unit distinct circuit is
protected against excess energy by means of suitable cut-out or a circuit
breaker of adequate breaking capacity suitably located and, so constructed as
to prevent danger from overheating, arcing or scattering of hot metal when it
comes into operation and to permit for ready renewal of the fusible metal of
the cut-out without danger;
(d) The supply
of energy of each motor or a group of motors or other apparatus meant for
operating one particular machine is controlled by a suitable linked switch or a
circuit breaker or an emergency tripping device with manual reset of requisite
capacity placed in such a position as to be adjacent to the motor or a group of
motors or other apparatus readily accessible to and easily operated by the
person incharge and so connected in the circuit that by its means all supply of
energy can be cut off from the motor or group of motors or apparatus from any
regulating switch, resistance of other device associated therewith;
(e) All
insulating materials are chosen with special regard to the circumstances of its
proposed use and their mechanical strength is sufficient for its purpose and so
far as is practicable of such a character or so protected as to maintain
adequately its insulating property under all working conditions in respect of
Temperature and moisture; and
(f) Adequate
precautions shall be taken to ensure that no live parts are so exposed as to
cause danger.
(2) Where energy is being
supplied, transformed, converted or used the 7[consumer, supplier or
the owner] of the concerned installation shall be responsible for the
continuous observance of the provisions of sub-rule (1) in respect of his
installations.
(3) Every consumer shall use all
reasonable mean to ensure that where energy is supplied by a supplier no person
other than the supplier shall interfere with the service lines and apparatus
placed by the supplier on the premises of the consumer.]
Rule-50A: 8[Additional provisions for supply
and use of energy in multi-storeyed building (more than 15 metres in height):
(1) Before making an application
for commencement of supply or recommencement of supply after an installation
has been disconnected for a period of six months or more the owner/occupier of
a multi-storeyed building shall give not less than 30 days’ notice in writing
to the Inspector together with particulars. The supply of energy shall not be
commenced or recommenced within this period, without the approval or otherwise
in writing of the Inspector.
(2) The supplier/owner of the
installation shall provide at the point of commencement of supply a suitable
isolating device with cut out or breaker to operate on all phases except
neutral in the 3 phase 4 wire circuit and fixed in a conspicuous position at
not more than 2.75 metres above the ground so as to completely isolate the supply to the building in case of
emergency.
(3) The owner/occupier of a
multi-storeyed building shall ensure that electrical installations/works inside
the building are carried out and maintained in such a manner as to prevent
danger due to shock and fire hazards’ and the installation is carried out in
accordance with the relevant codes of practices.
(4) No other service pipes shall
be taken along the ducts provided for laying power cables. All ducts provided
for power cables and other services shall be provided with fire-barrier at each
floor crossing.]
Rule-51: Provisions applicable to medium, high or extra-high voltage
installations:
The following provisions shall be
observed where energy at medium, high or extra high voltage is supplied,
converted, transformed or used
(1)
(a) All
conductors (other than those of overhead lines) shall be completely enclosed in
mechanically strong metal casting or metallic covering which is electrically
and mechanically continuous and adequately protected against mechanical damage
unless the said conductors are accessible only to an authorised person or are
installed and protected to the satisfaction of the Inspector so as to prevent
danger;
9[Provided
that non-metallic conduits conforming to the relevant Indian Standard
Specifications may be used for medium voltage installations, subject to such
conditions as the Inspector or Officer appointed to assist an Inspector may
think fit to impose.]
(b) 10[All
metal works, enclosing, supporting or associated with the installation, other
than that designed to serve as a conductor shall be connected with an earthing
system as per standards laid down in the Indian Standards in this regard and in
also accordance with rule 61(4).]
(c) Every
switchboard shall comply with the following provisions, namely:
(i) A clear
space of not less than 1 metre in width shall be provided in front of the
switchboard;
(ii) If there
are any attachments or bare connections at the back of the switchboard, the
space (if any) behind the switchboard shall be either less than 20 centimetres
or more than 75 centimetres in width, measured from the farthest outstanding
part of any attachment or conductor;
(iii) If the
space behind the switchboard exceeds 75 centimetres in width, there shall be a
passage-way from either end of the switchboard clear to a height of 1.8 metres.
(d) 12[In
case of installations provided in premises where inflammable materials
including gases and/or chemicals are produced, handled or stored, the
electrical installations, equipment and apparatus shall comply with the
requirements of flame proof, dust tight, totally enclosed or any other suitable
type of electrical fittings depending upon the hazardous zones as per relevant
Indian Standard Specification.]
(2) 13[Where an application
has been made to a supplier for supply of energy to any installation, he shall
not commence the supply or where the supply has been discontinued for a period
of one year and above, recommence the supply unless he is satisfied that the
consumer has complied with, in all respects the conditions of supply set out in
sub-rule (1), of this rule, rules 50, 63 and 64.]
(3) Where a supplier proposes to
supply or use energy at a medium voltage or to recommence supply after it has
been discontinued for a period of six months, he, shall, before connecting or
reconnecting the supply, give notice in writing of such intention to the
Inspector 5[or any officer of specified rank and class appointed to assist the
Inspector].
(4) 14[If at any time after
connecting the supply, the supplier is satisfied that any provision of the
sub-rule (1) of this rule or of rules 50 and 64, is not being observed he shall
give notice of the same in writing to the consumer and the inspector,
specifying how the provisions has not been observed and to rectify such defects
in a reasonable time and if the consumer fails to rectify such defects pointed
out, he may discontinue the supply after giving the consumer a reasonable
opportunity of being heard and recording reasons in writing, unless the
inspector directs otherwise. The supply shall be discontinued only on written
orders of an officer duly notified by the supplier in this behalf. The supply
shall be restored with all possible speeds after such defects are rectified by
the consumer to the satisfaction of the supplier.]
Rule-52: Appeal to Inspector in regard to defects:
(1) If any applicant for a supply
or a consumer is dissatisfied with the action of the supplier in declining to
commence, to continue or to recommence the supply of energy to his premises on
the grounds that the installation is defective or is likely to constitute
danger, he may appeal to the Inspector to test the installation and the
supplies shall not, if the Inspector or under his orders, any other officer
appointed to assist the Inspector, is satisfied that the installation is free
from the defect or danger complained of, be entitled to refuse supply to the
consumer on the grounds aforesaid, and
shall, within twenty-four hours after the receipt of such intimation from the
Inspector, commence, continue or recommence the supply of energy.
(2) Any test for which
application has been made under the provision of sub-rule (1) shall be carried
out within seven days after the receipt of such application.
(3) This rule shall be endorsed
on every notice given under the provisions of rules 47, 48, and 49.
Rule-53: Cost of inspection and test of consumer’s installation:
(1) The cost of the first
inspection and test of consumer’s installation carried out in pursuance of the
provisions of rule 47 shall be borne by the supplier and the cost of every
subsequent inspection and test shall be borne by the consumer, unless in the
appeal under rule 52, the Inspector directs otherwise.
(2) The cost of any inspection
and test made by the Inspector or any officer appointed to assist the
Inspector, at the request of the consumer or other interested party, shall be
borne by the consumer or other interested party, unless the Inspector directs
otherwise.
(3) The cost of each and every
such inspection and test by whomsoever borne shall be calculated in accordance
with the scale specified by the Central or the State Government as the case may
be in this behalf.
Rule-54: Declared voltage of supply to consumer:
Except with the written consent
of the consumer or with the previous sanction of the State Government a
supplier shall not permit the voltage at the point of commencement of supply as
defined under rule 58 to vary from the declared voltage:
(i) In the
case of low or medium voltage, by more than 6 per cent, or;
(ii) In the
case of high voltage, by more than 6 per cent on the higher side or by more
than 9 per cent on the lower side, or;
(iii) In the
case of extra-high voltage, by more than 10 per cent on the higher side or by
more than 12.5 per cent on the lower side.
Rule-55: Declared frequency of supply to consumer:
Except with the written consent
of the consumer or with the previous sanction of the State Government a
supplier shall not permit the frequency of an alternating current supply to
vary from the declared frequency by more than 3 per cent.
Rule-56: Sealing of meters, and cut-outs:
(1) A supplier may affix one or
more seals to any cut-out and to any meter, maximum demand indicator, or other
apparatus placed upon a consumer’s premises in accordance with section 26, and
no person other than the supplier shall break any such seal.
(2) The consumer shall use all
reasonable means in his power to ensure that no such seal is broken otherwise
than by the supplier.
(3) The word ‘supplier’ shall for
the purpose of this rule include a State Government when any meter, maximum
demand indicator or other apparatus is placed upon a consumer’s premises by
such Government.
Rule-57: Meters, maximum demand indicators and other apparatus on
consumer’s premises:
(1) Any meter or maximum demand
indicator or other apparatus placed upon a consumer’s premises in accordance
with section 26 shall be of appropriate capacity and shall be deemed to be
correct if its limits of error are within the limits specified in the relevant
Indian Standard Specification and where no such specification exists, the
limits of error do not exceed 3 per cent above or below absolute accuracy at
all loads in excess of one tenth of full load and up to full load.
15[Provided that for
extra high voltage consumers the limit of error shall be 1 per cent.]
(2) No meter shall register at no
load.
(3) Every supplier shall provide
and maintain in proper condition such suitable apparatus as may be prescribed
or approved by the Inspector for the examination, testing and regulation of
meters used or intended to be used in connection with the supply of energy.
Provided that the supplier may
with the approval of the Inspector and shall, if required by the Inspector,
enter into a joint arrangement with any other supplier for the purpose
aforesaid.
(4) Every supplier shall examine,
test and regulate all meters, maximum demand indicators and other apparatus for
ascertaining the amount of energy supplied before their first installation at
the consumer’s premises and at such other intervals as may be directed by the
State Government in this behalf.
(5) Every supplier shall maintain
a register of meters showing the date of the last test, the error recorded at
the time of the test, the limit of accuracy after adjustment and final test, the
date of installation, withdrawal, reinstallation, etc., for the examination of
the Inspector or his authorised representative.
(6) 16[Where the supplier has
failed to examine, test and regulate the meters and keep records thereof as
aforesaid, the Inspector may cause such meters to be tested and sealed at the
cost of the owner of the meters in case these are found defective.]
Rule-58: 17[Point of commencement of supply:
The point of commencement of
supply of energy to a consumer shall be deemed to be the point at the incoming
terminal of the cut-outs installed by the consumer under rule 50.]
Rule-59: Precautions against failure of supply, Notice of failures:
(1) The layout of the electric
supply lines of the supplier for the supply of energy throughout his area of
supply shall under normal working conditions be sectionalised and so arranged,
and provided with cut-outs or circuit-breakers so located, as to restrict
within reasonable limits the extent of the portion of the system affected by
any failure of supply.
(2) The, supplier shall take all
reasonable precautions to avoid any accidental interruptions of supply, and
also to avoid danger to the public or to any employee or authorised person when
engaged on any operation during and in connection with the installation,
extension, replacement, repair and maintenance of any works.
(3) The supplier shall send to
the Inspector 18[or any officer of a specified rank and
class appointed to assist the Inspector] notice of failure of supply of such
kind as the Inspector 1[or any officer of specified rank and class to assist
the Inspector] may from time to time require to be notified to him, and such
notice shall be sent by the earliest practicable post after the failure occurs
or after the failure becomes known to the supplier and shall be in such form
and contain such particulars as Inspector may from time to time specify
(4) 19[For the purpose of
testing or for any other purpose connected with the efficient working of the
undertaking, the supply of energy may be discontinued by the supplier for such
period as may be necessary, subject (except in cases of emergency) to not less
than 24 hours’ notice being given by the supplier to all consumers likely to be
affected by such discontinuance:
Provided that the supply of
energy shall be discontinued during such hours as are likely to interfere the
least with the use of energy by consumers and the energy shall not be
discontinued if the Inspector so directs.]
1. Ins. by GSR 218, Date. 18.4.1995, with effect
from: 29.4.1995.
2. Subs. by GSR 529, Date. 11.7.1986, with effect
from: 19.7.1986.
3. Subs. by GSR 466, Date. 18.7.1991, with effect
from: 17.8.1991.
4. Subs. by GSR 529, Date. 11.7.1986, with effect
from: 19.7.1986.
5. Subs. by GSR 11”, Date. 21.1.1986, with effect
from: 8.2.1986.
6. Subs. by GSR 218, Date. 18.4.1995, with effect
from: 29.4.1995.
7. Subs. by GSR 218, Date. 18.4.1995, with effect
from: 29.4.1995.
8. Ins. by GSR 358, Date. 30.4.1987, with effect from:
9.5.1987.
9. Subs. by GSR 336, Date. 28.3.1988, with effect
from: 23.4.1988.
10. Subs. by GSR 358, Date. 30.4.1987, with effect
from: 9.5.1987.
11. Ins. by GSR 529, Date. 11.7.1986, with effect
from: 19.7.1986.
12. Subs. by GSR 256, Date. 28.2-1983, with effect
from: 26.3.1983
13. Ins. by GSR 466, Date. 18.7.1991, with effect
from: 17.8.1991.
14. Subs. by GSR 732, Date. 18.6.1985, with effect
from: 3.8.1985.
15. Added by GSR 218, Date. 18.4.1995, with effect
from: 29.4.1995.
16. Added by GSR 844, Date. 31.7.1985, with effect
from: 7.9.1985.
17. Subs. by GSR 45, Date. 1.1.1993, with effect
from: 23.1.1993.
18. Ins. by GSR 466, Date. 18.7.1991, with effect
from: 17.8.1991.
19. Subs. by GSR 732, Date. 18.6.1985, with effect
from: 3.8.1985.
