CEA SAFETY RULES 2010

REGULATIONS NOTIFIED ON

27.09.2010Presented by

Vivek Kumar Bhandari

Manager/Elect.

CHAPTER-1DEFINITIONS

OWNER: means company or body which owns or operates or maintains electrical plants and lines.

CHAPTER-2 Regulation-3: Supplier or owner shall

Depute DESIGNATED person for the purpose to operate and carry out work on electrical lines.

Maintain register where the name and purpose of DESIGINATED person shall be entered.

No person shall be DESIGNATED unless he possesses certificate of competency and his name is entered in the register.

CHAPTER-2 Regulation -4:

Inspection of designated officer and other safety items by Electrical Inspector.

CHAPTER-2 Regulation-5: Electrical safety officer. All suppliers of electricity and factories

registered under factory act 1948, where more than 250KW of electrical load is connected shall designate a person for observance of safety provisions and for inspection, ensuring testing and keeping records.

The qualification of this person: BE+ 10 /Diploma+15 (O&M electrical plants)

CHAPTER-2 Regulation-6 & 7: Operation and

maintenance of power plants & transmission & distribution system

Supervisor: At least Diploma + Training under schedule-I&II.

Technician: At least two year ITI course + Training under schedule-I&II.

Syllabus and time of training

CHAPTER-2 Regulation-8,9,10: Records &

inspection , Deposit of maps & deposit of printed copies

Keeping records of map, plans, sections, related to supply and transmission

These are to be produced before electrical inspector for inspection.

CHAPTER-2 Regulation-11: Plan of area of supply

to be made & kept open for inspection. Plan of area of supply depicting alignment

and in case of underground works, approx depth, location etc in electronic formats.

Plan to be corrected every year.Old plans to be converted into electronic

formats with in three years.GPS mapping to be done within five years.Plans free of cost to electrical inspector

while on fee basis to any applicant.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-12: Safety requirements of

construction, installation, protection, operation & maintenance. SUFFICIENT Fault current, insulation,

mechanical strength of equipments –- construction, installation strength to ensure safety of human, animals & property.

Material and apparatus shall conform to relevant specifications of Bureau of Indian standards

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-13 & 14: Service lines and

apparatus & Switchgears on consumers premises.

SUPPLIER - Healthiness of equipments on consumers premises is to be ensured.

Supplier shall provide suitable switchgear for each service line within the consumers premises.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-15:Identification of earthed and

earthed neutral conductors and position of switchgear therein. Earthed conductor to be distinguished from live

conductors. NO link or switch in earthed conductor except when

switch isolates live and neutral conductors simultaneously.

Regulation-16:Earthed terminal at consumers premises Suitable earthed terminal to be provided by supplier

at the point of commencement of supply. For installations of above 250 Volts, consumer in

addition to the supplier earth terminal shall provide independent earthed electrode for own earthing.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-17: Accessibility of bare

conductor.Bare conductors are not accessible.Provision of accessible position switches for

rendering them dead whenever necessary. Regulation-18:Danger notices in Hindi or

English and local language with sign of skull and bones as per IS 2551For installations above 250V.At every motor generator transformer and

equipments used for controlling apparatus.All supports of equipments which can be climbed

upon without ladder used for voltage 650V.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-19: Handling of electrical supply

lines and apparatus. Disconnecting the supply and discharging. DESIGNATED person with safety gears. Insulating mats complying with IS-15652:2006. Panel shall be painted with description of its

identification Regulation-20:Supply to vehicles and

cranes. In case external supply is given to the moving

vehicle it is to be ensured that a control switch shall disconnect the voltage in one operation.

If moving vehicle is running on rails, these rails shall be electrically continuous and be earthed

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-21: Cables for portable

apparatus. Insulated and protected from mechanical

injury. Regulation-22: Cables protected by

bituminous material. Insulation and protection through SITU

(producing noxious and explosive gases on heating) has been discontinued.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-23: Street boxes.

Provision of covers and doors and locks.Prevent influx of gas or water.

Regulation-24 & 25: Distinction of different circuits & Installations having more than one feeds.Different circuits & installations with more

than one feed are readily distinguishable from one another by means of indication of permanent nature.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-26: Accidental Charging.

Ensuring no accidental charging to a voltage beyond the limits intended for.

Ensure that the AC & DC circuits installed on same box do not come in the contact with each other.

Regulation-27: Protective equipments. Fire buckets with dry sand & fire extinguishers at

substations and switching stations at convenient location.

Fire extinguishers to be tested every year & record maintained.

First aid boxes. One person trained in first aid treatment shall be available during all working hours.

At least two gas masks or more for 5MVA substations to be used in event of fire or smoke. & Adequate no. for below the 5MVA capacity.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-28: Display of instruction

for resuscitation of person suffering from electrical shock. Instruction in Hindi or English & in local

language of district.Designated persons are acquainted with and

are competent to apply these instructions.Artificial respirator at every station with

voltage exceeding 650V.

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-29: Alteration and repairs.

No alteration, additions to existing installations except by electrical contractor licensed in this behalf by state govt.

The work executed for or on behalf of central govt. Or in any other case, centre govt. or state govt can exempt these conditions by notifications in official gazette .

Regulation-30: Periodical inspection and testing of installations. Every installation above 650 volts - to be tested and

inspected at an interval of every 5 years either by supplier or electrical inspector.

When supplier is directed by central govt or state govt. to inspect , report is to be submitted to Electrical Inspector.

Schedule IV Form I,II,III (Standard formats)

CHAPTER-3GENERAL SAFETY REQUIREMENTS Regulation-31: Testing of consumer

installations.New connection or reconnecting of supply

after six months , the supplier shall either test the installation himself or accept the test results signed by licensed electrical contractor.

Regulation-32: Installation and testing of generating units.Generating units of capacity shall be

inspected by Electrical Inspector before commissioning.

CHAPTER-4GENERAL CONDITIONS RELATING TO SUPPLY AND USE OF ELECTRICITY Regulation-33 & 34: Precautions

against leakage.All equipments shall have IR value as

specified in IS standards.For < 650 Volts installations -500V megger-

one minute-1 Mega ohms.For > 650 Volts & < 33KV installations- 2.5

KV megger -1 minutre-5 Mega ohms.Electrical Inspector can direct get the

installation tested and consumer shall have to facilitate it.

CHAPTER-4GENERAL CONDITIONS RELATING TO SUPPLY AND USE OF ELECTRICITY Regulation-35: Supply and use of

electricity. Control gear to carry and break the current shall

be placed near point of commencement of supply.

For < 650 Volts Fuse or circuit breaker. For > 650 V -33KV installations- Fuse or CB but

(11KV-1000KVA & 33KV-2500KVA) else CB. >33 KV- CB. Every transformer of capacity 1000kVA shall be

provided with CB or linked fuse on primary side and secondary side.

All motors shall be prided with linked fuse or CB or emergency tripping device

CHAPTER-4GENERAL CONDITIONS RELATING TO SUPPLY AND USE OF ELECTRICITY Regulation-36: Supply and use of

electricity in building more than 15 meters in height.Elec. Insp. discretion of Govt.- Voltage and

Capacity. Isolating device at the commencement of

supply at a height not more than 1.7 meters.No other service pipes and cables shall be

taken along the ducts provided for laying power cables.

Fire barriers at each floor crossing.

CHAPTER-4GENERAL CONDITIONS RELATING TO SUPPLY AND USE OF ELECTRICITY Regulation-37: Installations of voltage

exceeding 250 Volts. All metal works other than conductors to be

earthed. Clear space of 1 meter in front of switchboard. Back space less than 20cm or more than 750 cm.

(75 cm – clear passage of height 1.8 meters) Regulation-38: Appeal to Electrical

Inspector. If supplier declines to commence the supply on

the grounds that the installation is defective, the consumer may appeal to electrical inspector to test the installation. EIG clears -24 hours supply commencement.

CHAPTER-4GENERAL CONDITIONS RELATING TO SUPPLY AND USE OF ELECTRICITY Regulation-39: Precautions against

failure of supply and notice of failures.Supplier shall take reasonable efforts to

avoid accidental interruption of supply and avoid danger to public and DESIGNATED person.

Failure of supply as per the nature decided by electrical inspector may be communicated to him.

Standard Form given in schedule-IV

CHAPTER-5SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS Regulation-40: Test of resistance of

insulation.No reconnection without insulation resistance

measurement. Regulation-41: Connection with earth.

Neutral of 3 Ph 4 Wire and earth of 2 Ph 3 wire shall be earthed with two separate distinct connections with min of two different electrodes.

Interconnection of earth electrodes.Armour of cables shall be earthed at two distinct

points.No earth connection with the aid of water pipes.

CHAPTER-5SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS Regulation-41: Contd....

Frame of Transformer, generator, motor shall be earthed at two distinct points.

3 pin type sockets with 3rd pin earthed. All earthing system shall withstand corrosion and

retain electrical continuity during life of installation. The electrode and mesh shall carry fault current without rise of temperature.

All earthing shall be tested once every year on the driest day.

Regulation-42: Earth leakage protective devices Other than voltage 250 Volts and load below 5 KW

shall be controlled by earth leakage protective devices.

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES EXCEEDING 650 VOLTS Regulation-43: Approval by electrical inspector.

Voltage above which electrical installation is to be inspected is to be notified by Appropriate Govt.

Installation exceeding 650Volts who makes addition or alteration – supply connection Electrical Inspector approval.

Regulation-44: use of electricity at voltage exceeding 650V. Safety clearances for electrical apparatus as per IS. Minimum safety working clearances

KV meters

25 2

36 2.8

72.5 3.1

145 3.7

245 4.3

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS

Regulation-44: Contd.... Safe working clearance: is the minimum clearance to be

maintained between the live part of the equipment on one hand and earth or another piece of equipment or conductor on which it is necessary to carry out the work , on the other hand.

The apparatus with more than 2000 litres of oil not to be installed in basement where oil drainage can not be provided.

More than 2000 litres of transformers – baffle wall with four hour fire rating if adequate clearance is not available.

More than 9000 litres – soak pit with arrangement of drainage and extinguishing of fire in case of ignition.

Only dry type transformers be used inside the residential and commercial buildings.

More than 10MVA capacity transformers. Fire fighting system as per IS 3034 or nitrogen injection fire protection system.

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS

Regulation-44: Contd.... Substation in basement:

Room shall necessary be in first basement.2 hour fire rated doors and shall be kept closed.Cable sealing of Pr. And Sec. Side of transformers

at all floor and wall openings to be of 2 hour ratings.

FRLS cables of two hour rating to be used.More than 10MVA capacity transformers. Fire

fighting system as per IS 3034 or nitrogen injection fire protection system.

All apparatus shall be protected against lightening and for voltages above 220KV, against switching surges.

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS Regulation-45: Interlocks and protection.

Interlocks Isolator and circuit breaker. Isolator and earth switch. Interlock to avoid paralleling if supplies are not intended to be

parallel. Inter tripping between HV and LV side in case of paralleling of

transformers. All doors giving access to live parts shall be interlocked so that

that access is possible only after making live part dead and earth.

Protection 50/51,50n/51n,PRV, OTI, WTI for >1000KVA Transformers >10 MVA- 87T, >132 KV 87B, LLB Grid substation : disturbance recorder and event logging. Distance protection and carrier communication protection at

400KV level.

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS Regulation-46: Testing , operation and

maintenance. If required by inspector , Manufacturers test reports for

routine tests before approval by electrical inspector. Site test reports for new apparatus or apparatus

disconnected for more than six months. Records of all tests and tripping to be maintained for

future comparisons. Failures of transformers of capacity more than 20MVA to

be reported to CEA with reasons with in 48 days. Standard Format in schedule IX

Regulation-47: Protection against leakage in cables Armour/sheaths shall be continues and connected with

earth.

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS Regulation-48: Connection with earth.

All metallic and non current carrying parts to be connected to mat: to limit step and touch potential. Protective devices remain effective.

Neutral of star connected devices to be earthed with two separate connections.

Regulation-49: Conditions as to transform and control electricity.Fencing of not less than 1.8 meter height.

CHAPTER-6SAFETY PROVISIONS FOR VOLTAGES < 650 VOLTS Regulation-50: Pole type substation. Regulation-51: Condensers Regulation-52: Luminous tube signs Regulation-53: Supply to electrode

boiler Regulation-54: Supply to X-ray

CHAPTER-7SAFETY PROVISIONS FOR OVERHEAD LINES, UNDERGROUND CABLES AND GENERATING STATIONS

Regulation-55: Material & strength. Regulation-56: Max stress and factor of

safety. Regulation-57: Clearances above

ground.

Voltage Across/along street Clearance in meters

650-33 kv

across 6.1 m

>33KV Across/along Max( 6.1,5.2+0.3m/33KV)

CHAPTER-7SAFETY PROVISIONS FOR OVERHEAD LINES, UNDERGROUND CABLES AND GENERATING STATIONS

Regulation-59: Clearances between conductors trolley wires.

Regulation-60 & 61: Clearances from building of lines.

Voltage Above/adjacent to building

Clearance in meters

< 650 above 2.5 m from highest point of building

< 650 adjacent Horizontal clearance of 1.2 m (max deflection)

> 650 – 33KV

above 3.7 m

> 33KV above 3.7+.03/33KV

>650 – 33KV

adjacent 1.2 m

> 33KV adjacent 2 + .3/33Kv

CHAPTER-7SAFETY PROVISIONS FOR OVERHEAD LINES, UNDERGROUND CABLES AND GENERATING STATIONS

Regulation-62-75: Transmission lines.

Regulation-76: Laying of cablespower cable of voltage >33KV be laid at a

minimum depth of 1.2 m.Separation between power cable> 33KV and

communication line shall be 0.6 meters. Regulation-77: Protection against

electromagnetic interferencePower line of voltage exceeding 11KV shall

get PTCC clearance

CHAPTER-8SAFETY REQUIREMENT FOR ELECTRICAL TRACTION

“Nothing in this chapter shall apply to electricity used for public carriage of passengers, animals, or goods on , or lighting or ventilation of the rolling stock of any railway or tramway subject to the provision of railway act.”

CHAPTER-9SAFETY REQUIREMENT FOR MINES AND OIL FIELDS

CHAPTER-10DEVIATIONS

Regulation-116: Deviations

State govt or centre govt may written order give deviation to these regulations except regulation-30.

Electrical inspector by order in writing can allow deviations in respect of matters referred in regulation as specified in the clause