Abstract of IE Rules

Abstract of Indian Electricity Rules:

1)    Cut-out on consumer’s premises:

  • The supplier shall provide a suitable cut-out in each conductor of every service-line other than an earthed or earthed neutral conductor or the earthed external conductor of a concentric cable within a consumer’s premises, in an accessible position. Such cut-out shall be contained within an adequately enclosed fireproof receptacle.
  • Where more than one consumer is supplied through a common service-line, each such consumer shall be provided with an independent cut-out at the point of junction to the common service
  • Every electric supply line other than the earth or earthed neutral conductor of any system or the earthed external conductor of a concentric cable shall be protected by a suitable cut-out by its owner
  • No cut-out, link or switch other than a linked switch arranged to operate simultaneously on the earthed or earthed neutral conductor and live conductors shall be inserted or remain inserted in any earthed or earthed neutral conductor of a two wire-system or in any earthed or earthed neutral conductor of a multi-wire system or in any conductor connected thereto with the following exceptions:(a) A link for testing purposes, or (b) A switch for use in controlling a generator or transformer.

2)    Danger Notices:

  • The owner of every medium, high and extra-high voltage installation shall affix permanently in a conspicuous position a danger notice in Hindi or English and the local language of the district, with a sign of skull and Bones 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 climb-upon without the aid of ladder or special appliances.

3)    Cables :

  • Flexible cables shall not be used for portable or transportable motors, generators, transformer rectifiers, electric drills, electric sprayers, welding sets or any other portable or transportable apparatus unless they are heavily insulated and adequately protected from mechanical injury.
  • Where the protection is by means of metallic covering, the covering shall be in metallic connection with the frame of any such apparatus and earth.
  • The cables shall be three core type and four-core type for portable and transportable apparatus working on single phase and three phases supply respectively and the wire meant to be used for ground connection shall be easily Identifiable
  • Where A.C. and D.C. 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.

4)    Safety:

  • Two or more gas masks shall be provided conspicuously and installed and maintained at accessible places in every generating station with capacity of 5 MW and above and enclosed sub-station with transformation capacity of 5 MVA and above for use in the event of fire or smoke.
  • Provide that where more than one generator with capacity of 5 MW and above is installed in a power station, each generator would be provided with at least two separate gas masks in accessible and conspicuous position.

5)    High Voltage Equipments installations

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

6)    Every switchboard shall comply with the following provisions, namely:

  • A clear space of not less than 1 meter in width shall be provided in front of the switchboard;
  • 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 centimeters or more than 75 centimeters in width, measured from the farthest outstanding part of any attachment or conductor;
  • If the space behind the switchboard exceeds 75 centimeters in width, there shall be a passage-way from either end of the switchboard clear to a height of 1.8 meters.

7)    Declared voltage of supply to consumer:

  • In the case of low or medium voltage, by more than 6 per cent, or;
  • 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;
  • 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.

8)    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.

9)    Meters, maximum demand indicators and other apparatus on consumer’s premises

  • 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 Connection with earth Neutral conductor of a phase, 4 wire system and the middle conductor of a   2 phase, 3-wire system shall be earthed by not less than two separate and distinct connections with a minimum of    two different earth electrodes of such large number as may be necessary to bring the earth resistance to a               satisfactory value both at the generating station and at the sub-station. The earth electrodes so provided, may be interconnected to reduce earth resistance. It may also be earthed at one or more points along the   distribution system or service line in addition to any connection with earth which may be at the consumer’s  premises
  • In the case of a system comprising electric supply lines having concentric cables, the external conductor of such cables shall be earthed by two separate and distinct connections with earth.
  • The connection with earth may include a link by means of which the connection may be temporarily interrupted for the purpose of testing or for locating a fault.
  • All metal castings or metallic coverings containing or protecting any electric supply-line or apparatus shall be connected with earth and shall be so joined and connected across all junction boxes and other openings as to make good mechanical and electrical connection throughout their whole length.

10) Use of energy at high and extra-high voltage

Voltage Ground clearance                     Sectional clearance
11KV    2.75 Meter 2.6 Meter
33KV 3.7 Meter 2.8 Meter
66KV 4.0 Meter 3.0 Meter
132KV 4.6 Meter 3.5 Meter
220KV 5.5 Meter 4.3 Meter
400KV 8.0 Meter 6.5 Meter

11) Transformer:

  • Where transformer or transformers are used, suitable provision shall be made, either by connecting with earth a point of the circuit at the lower voltage or otherwise, to guard against danger by reason of the said circuit becoming  Accidentally charged above its normal voltage by leakage from or contact with the circuit at the higher voltage
  • A sub-station or a switch station with apparatus having more than 2000 litres of oil shall not  be located in the basement where proper oil draining arrangement cannot be provided.
  • Where a sub-station or a switch station with apparatus having more than 2000 litres of oil is installed, whether indoor or out-doors, the following measures shall be taken, namely: –
  • The baffle walls 4[of 4 hour fire rating] shall be provided between the apparatus in the following cases: –
  • (1) Single phase banks in the switch-yards of generating stations and substations;
  • (2) On the consumer premises;
  • (3) Where adequate clearance between the units is not available.
  • Provisions shall be made for suitable oil soakpit and where use of more than 9000 litres of oil in any one oil tank, receptacle or chamber is involved, provision shall be made for the draining away or removal of any oil which may leak or escape from the tanks receptacles or chambers containing the same.
  • The transformer shall be protected by an automatic high velocity water spray system or by carbon dioxide or BCF (Bromo chlorodi feuromethane) or BTM (Bromo tri fluromethane) fixed installation system; and
  • Oil filled transformers installed indoors shall not be on any floor above the ground or below the first basement.
  • Isolators and the corresponding earthing switches shall be interlocked so that no earthing switch can be closed unless and until the corresponding isolator is in open position.
  • When two or more transformers are operated in parallel, the system shall be so arranged as to trip the secondary breaker of a transformer in case the primary breaker of that transformer trips.
  • Where two or more generators operate in parallel and neutral switching is adopted, inter-lock shall be provided to ensure that generator breaker cannot be  closed unless one of the neutrals is connected to the earthing system.
  • Gas pressure type protection to given alarm and tripping shall be provided on all transformers of ratings 1000 KVA and above.
  • Transformers of capacity 10 MVA and above shall be protected against incipient faults by differential protection; and  All generators with rating of 100 KVA and above shall be protected against earth fault/leakage. All generators of rating 1000KVA and above shall be protected against faults within the generator winding using restricted earth fault protection or differential protection or by both.

1)    Connection with earth:

  •  In case of the delta connected system the neutral point shall be obtained by the insertion of a grounding transformer and current limiting resistance or impedance wherever considered necessary at the commencement of such a system.
  • Where the earthing lead and earth connection are used only in connection with earthing guards erected under high or extra-high voltage overhead lines where they cross a telecommunication line or a railway line, and where such lines are equipped with earth leakage relays of a type and setting approved by the Inspector, the resistance shall    not exceed 25 ohms.

2)    Clearance above ground of the lowest conductor

  • No conductor of an overhead line, including service lines, erected across a street shall at any part thereof be at a height of less than:
  • For low and medium voltage lines 5.8 meters
  • For high voltage lines 6.1 metres
  • No conductor of an overhead line, including service lines, erected along any street shall at any part thereof be at a height less than:
  • For low and medium voltage lines 5.5 metres
  • For high voltage lines 5.8 metres
  • No conductor of in overhead line including service lines, erected elsewhere than along or across any street shall be at a height less than:
  • For low, medium and high voltages lines=4.6 meters.
  • For low, medium and high voltage=4.0 meters.
  • For high voltage lines above 11,000 volts=5.2 meters.
  •  For extra-high voltage lines the clearance above ground shall not be less than 5.2 metres plus 0.3 meter for every 33,000 volts or part thereof by which the voltage of the line exceeds 33,000 volts.

 

65 Responses to Abstract of IE Rules

  1. Dear Sh Parmar,
    I am Pravinchandra Mehta working as DGM Engineering at EMCO Ltd Thane Maharashtra.Nice to meet u on this forum _every problem has solution.Congrats for the efforts for collection and sharing.I am basically from vadodara and working in the power sector since 24 yrs..I would like to extend the freindship with u.
    Thanks and regards,
    Pravin

    • In our Hsg society in Pune. We have Isolator installed between Elect meter and elect distribution board installed in each flat. Is this system ok? or we should connect MCB in place of Isolator.Kindly suggest.

    • srikanth says:

      I am Srikanth from Chennai, can you clarify who will do the earth pit construction as per IS 3043 standards in chennai

  2. Jerome Ryan Deleonio says:

    Hi Jignesh Parmar,
    I would like to thanks you for your post. I helps me a lot so far
    I am currently working with standard/manual for distribution utility in the Phillipines.
    Just wanting to say Good Job & More Power

  3. dinesh narkhede says:

    Hi
    Mr. Jignesh Parmar

    I am Dinesh Narkhede working as Asistant Manager – Plant Engineering at Volkswagen India ,
    Pune , Maharashtra. I would like to thank you for your post.
    It’s a very collective information very useful to any Electrical Engineer.
    Once again Thanks for your efforts and sharing the knowledge.

    Thanks & Regards
    Dinesh

    • vibhakar says:

      hello sir
      i did my b.tech in electrical engineering..and m.tech in electrical power systems..pls guide me good course or any job in our core field

  4. Deepak Chaudhari says:

    Hi Jignesh Parmar,
    I am Deepak Chaudhari working as Electrical Engg ,
    Mumbai , Maharashtra. I would like to thank you for your post.
    its really important information which required to have with every electrical engg.
    I know that your many friends are working in power sector. so I suggest that you must kept one jobs section on your site. so its will helps to many peoples.i hope u will consider my suggestion.

    Thanks & Regards
    Deepak

  5. Rakesh Purohit says:

    Hi Mr Jignesh,

    You are doing a great job,not every one in today’s world share useful information and that too free.
    It is a great platform for young electrical engineers to hone their professional skills.

    Thank you

  6. Naveen says:

    Hi Jignesh Parmar,

    I would like to thanks you for your post.I have 2 years exp in design field. i want study more and more in power sector designing . please tell me any design books for substation or over all designing.

    Thank u,

  7. Ms.shaista khan says:

    Dear sir,
    Thanks for giving information of electrical. I am working as a Sr. Engineer-Project (Execution) of diesel generator. i have many query regarding to DG sets,

  8. S M Mujumdar says:

    It is a good effort. However as per Electricity Act (EA) 2003, Central Electricity Authority has formulated Regulations for Electrical safety 2010 & published in Gazette of India. Hence as per provision of EA 2003, IE Rules 1956 are repelled.

  9. Anand says:

    Dear Sir,

    I am Anand from Delhi. Working for a private company a Asst. Manager (Electrical Projects).

    I thank you very much for such a great job in the field of electrical engineering by compiling the documents and sharing to everybody.

    Wish you a great success ahead..

  10. RAMESH says:

    Dear Sir..
    Salute 2 u frm d depth of my heart ,4 such gr8 doings, helping all of us 2 learn and enjoy d real learning ,,pls do this 4ever so we never 4get u nor ur teachings….mny more 2 say u r great…

    thanks 2 u…

  11. Parbat Singh says:

    Dear sir,
    Congratulations & Thanks for hard work and sharing your knowledge to everyone!!!
    Sir, We have a request from electrical transmission company for crossing of underground EHV cable ( 33KV) across over existing underground LPG pipeline( crossing is perpendicular@ 90 deg angle). What shall be mini. clearance between pipeline top and cable bottom. Pipeline is Cathodic protected ( -0.85 to -1.5 v). What precautionary measures we can take to avoid interference to our pipeline CP system and avoid detrimental effect to our pipeline by high voltage in cable or any fault in cable.
    We are planning to put RCC slabs in between pipeline and cable and enclose cable( 20 meter length) in thick PVC pipe
    with regards
    Parbat Singh

  12. Zulfeqar Ali says:

    Dear Sir,

    Thanks a lot for sharing the Abstract of IE Rules.

    One more thing I wanted to know that DG set Installion upto 10KVA permision is not required from Electrical inspector, but above 10KVA is required,

    I have tried to get the reference from where it has been taken, but could not get .

    Can you tell me the reference clause of IE rule / Act or any other standards/documents in support of it.

    Regards

    Zulfeqar Ali
    JSPL Raigarh

  13. BALARAMAN says:

    BALARAMAN
    thank u sir.
    sir I want totely thierical deatils of y d starter so please email me on address.

  14. Mahi says:

    Hello Mr Parmar,

    I m a electrical engineer having 5 yrs of experience.Recently i changed my field into substation design and finding it very interesting.But not due to proper design set up in my company i m not clear about this design field..Ur posts really helped me a lot…Thnx …Mahi…

  15. Dear Sir ,
    Thanks for this wonderful positive power sharing. I am protection engineer at Jaipur in RVPN. Please arrange to provide protection related experience to this blog and let the protection engineers benefited.
    Anil Prajapati

  16. Thanks for “Great Effort” Its really very useful for Project Designing & Project Management. I am working as “Utilities Engineer_Electrical” with NATRiP (Under Ministry of Heavy Industries_Central Govt. of India)

  17. Kofi Appeagyei says:

    Hello Parmar,

    I am a young Electrical Engr, just over 3 yrs experience in supervision and design, i find your site so helpful, full of enlightening information. just wanna say thanks for sharing, God richly bless you.
    Would appreciate stuff on lightening protection design, especially rolling sphere method, angle method etc, particularly for high rise buildings

  18. murali sir says:

    help full for all eee cptc engeineers thankq sir

  19. SPS says:

    Hi! Nice colation.

    Can we locate Transformer next to building edge if the walls on two sides are fire rated and on two sides it is open . Also open to sky.

  20. Abhilash says:

    You are doing a wonderful job. Thank you very much for your posts. keep on going

  21. Praveenkumar says:

    The notes very useful engineering students .

  22. Sivakumar says:

    How much distance min or max we should keep between a transformer and a breaker panel…..

  23. Prashant. Kudtarkar says:

    Sir,
    We are installing 3 Nos of Indoor rectifier transformers ( covered by walls 3 sides and open 1 side ) , please suggest me the clearance to be maintained between transformer and walls.

  24. Shriram V. Bhardwaj says:

    Dear Parmar, I am really thankful to you for this valuable piece of Article, I am a law professional from Himachal Pradesh. Although your article is based on technical knowledge and a person belonging to engineering sector may well understand your article but still it has some good enough material for layman like me. Actually I am searching for some info regarding the distance of a electricity transformer(63 kv) from a residential home but I am not getting the proper information on this point. So if you can write on this topic it would be more helpful for a layman to gain some bit more knowledge from your scholarly article. If you can provide me this info as to how much distance a electricity transformer should be having from a residential house? I shall be really thankful to you for this solicited help. If anyone reading this reply may give me the answer please onto the following emails:

    Thanks

    Shriram Vishwanath

    Advocate,
    Mandi, Himachal Pradesh

  25. punith pm says:

    sir am punith electrical engineer i need to know wether the DG can be installed in mezzanine flour according to IE rule????

  26. jahangir ahmad says:

    Dear Mr Jignesh. I am pleased to read your article,May you prosper always.
    I may add that you also quote the no. of the relevant clause of the act against each note to make your extracts more authentic.
    Further to the above , for the flexible cables I wish to add in the relevant context,that sectional area of the conductor of one of the wire should be larger as compared to others so that it may not burn off if all other leads are burnt out due to short circuit & heavy fuse. This will keep the lead from breakage which often results in the spread of elrctricity & fire.(This condition is essential for the unshielded rubber insulated cables only, which are being used for domestic purpose in a large quantom now a days.
    Regards
    Jahingir Ahmed
    Karachi Pakistan

  27. DK Sharma says:

    Dear Shri Jignesh.Parmar,
    I am D K Sharma, Retired Asstt Electrical Engineer from Railways.
    I feel very sorry, whenever I read about deaths due to overhead electrical wires snapping and falling on the roads or in fields.
    Para 87(1) of Indian Electricity Rules, 1956, stipulates ”Where an overhead line crosses or is in proximity to any telecommunication line, either the owner of the overhead line or or the telecommunication line, whoever lays his line later, shall arrange to provide for protective device or guarding arrangement. This Guarding arrangement should be made for all LT and HT lines which do not have any tripping arrangement in case the wire breaks.”

    My question is, why Guarding is not made mandatory under Indian Electricity Rules 1956.
    I have seen in UP, MP and Rajasthan, overhead lines in streets and on roads having no guarding arrangement. Every year many deaths are reported due to falling of live electric wires on the ground and causing deaths due to electrocution.

  28. Alkesh Raval says:

    Hi,
    I am Alkesh from Vadodara.
    I want to know the rules of DG Set installation in India
    We intend to install 25 KVA DG set at remote location away from village near Chanod.
    Is is compulsory to install Silent DG Set?
    What are other norms that we need to follow?

  29. sandeep babariya says:

    i would like to no what should be the height of meter from ground at consumer primisis

  30. deepak prasad shrivastava says:

    Sir,I dont know IE rool no 50,so pl gide me fo this rool .I am working in pvt sector textile devision last 15 years
    Thanks ,
    Deepak

  31. B.Nagaraju says:

    Dear Sir,
    I came to know that, now everyone is following CEA Electricity Act 2003, no one is following IE rules 1956, is it correct.

  32. B.Nagaraju says:

    Could you please send me the NEC 1985 standard copy, if you have please..

  33. ashok says:

    NICE TO READ

  34. Dipankar Sharma says:

    Hello Mr. Jignesh,
    Very Good afternoon , I am Dipankar Sharma working as an Executive Engineer (Engineering and Operations solution for IT sector Facility Management) in Jones Lang Lasalle.

    Thanks for sharing valuable information.

  35. imran khan says:

    Electrical work job

  36. ranjith says:

    how to calculate transformer NCTratio

  37. Electrical contractor brunswick says:

    Hello there, you’ve done a great job. Keep posting such kind of information on your blog.
    Regards: Electrical contractor brunswick

  38. naval says:

    hi jignesh sir,
    good one interesting for common man knowledge.

  39. Lt Col S K Paul (Retd) says:

    Dear Sri Jignesh,
    Thanks for sharing your knowledge. It saves a lot of time for quick reference to the rules and acts. I am retired Electrical engineer and was in need to know the provision of guard wires /stirrups etc under the high and very high tension lines passing over roads, canals, residents, rail lines etc. This in case if a live tension wire snaps due to storm earth quake or snow. Thank you and keep up the good work son.

  40. arvind kumar says:

    sir,
    i am arvind kumar site engineer in shalimar corp.ltd lucknow. it is most helpfull site for electrical services installation work. thanking u sir.

  41. Syed Faqruddin says:

    Dear Sir,

    I would like to know what is the safe distance from housing (Human in-habitation) a transformer can be installed as IE Act / Rules. A neighboring apartment has installed a HV transformer very close to the kitchen of my house.

  42. carvalho says:

    sir,
    Location of diesel generators in on the roof ie 8 mtrs shall we get permission from electrical inspector

  43. yogesh kulkarni says:

    Dear Sir,
    I am Yogesh Kulkarni,working in ThyssenKrupp pune.
    For the moving machine (ship loader/stacker reclaimer) mounted dry type of transformer what are the minimum mounting clearances required ? is there any IE/IS standard,rule for the same which explain in detail.

  44. S says:

    Kindly inform me about new changes happend in CEA (Particularly about inspection) .s

  45. B M SINGH says:

    As said by you PWD Electrical inspector permission not required up to 10 kva mobile or stationary, single or three phase DG set, please confirm the statutory rules/act for the same.

  46. himanshu says:

    hello Mr. jignesh
    I am himanshu pahwa from Delhi, I just wanted to know how much space should be their between a transformer/ sub station and a residential house as per the electricity act
    As their is a open space behind my house, electricity board want to install another transformer their and leaving no open space. please suggest.

  47. everything is risking in your life….

  48. P Harikrishna says:

    thanks for the good interesting postings and its a passion for the existing and upcoming engineers

  49. Channabasavaraju.M.D says:

    safety distance for oil storage tank to Electrical high tension line & transformer

  50. himanshu says:

    hello Mr. Jignesh
    can u please tell me what is the minimum clearance/ distance between a transformer and a residential building
    regards

  51. Shakil Shaikh says:

    Dear Mr. Jignesh,

    As per IE Rules, can you please inform what should be the minimum rating of Transformer for providing Nitrogen based Fire Fighting System

    Regards,

    Shakil Shaikh

  52. Suveer Kumar says:

    Any Idea if the Installation certificate from Electrical Inspector is still a requirement for DG set in NCR / Haryana/ UP / UK.

  53. K.srao says:

    What is the meaning of link service disconnect ion, what is the elect act number?

  54. can any one advice me are there any specific standards to be followed for multi gap (series gap) Lightning arrester or any methods for calculations for designing the length of gap in between two(Zinc) cylinders, for example let’s assume the lightning arrester is designed for 11 or 33 kV.

  55. Aziz pathan says:

    Very importance massage ….
    Dear sir,
    I am pathan aziz working as operator in mahatransco Maharashtra. Best information electricity &consumers safety rules .
    Thanks and regards,
    pathan

  56. Samsher bahadur says:

    Dear sir
    India mai voltage variations kitna hai

  57. manoj malik says:

    dear sir please provide the information in detail about the metering ie grid metering.KWH , KVARH,REVERSE CONNECTION OF CT/PT etc many more

    in waiting
    manoj malik

  58. Mohammad firj says:

    Dear sir
    Please tell me what does it mean ‘expiry date of LT PERMIT UNDER IE RULES FOR MINE.’

  59. fazal rehman says:

    faul current are given for 1second or how much time?plz add

  60. T.sivarajkumar. says:

    Dear sir.

    Thank you very much. Please send all electrical safety procedure.

  61. Vinoth says:

    Sir ! data is very useful .

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