Safe working with Electrical Safety.pdf

8/13/2019 Safe working with Electrical Safety.pdf

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Electrical SafetElectrical Safet

ShriShri PL KulkarniPL Kulkarni.. , . . , . . ., . . , . . .


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Indian Electricity Act, 1910Indian Electricity Act, 1910

Indian Electricity Rules, 1956Indian Electricity Rules, 1956,,

Electrical SafetyElectrical SafetyDos and DontsDos and Donts


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Indian Electricity Act,Indian Electricity Act,

esor ng o ega se ec n caesor ng o ega se ec n ca

processprocess

Authorised CEB to frame rules forAuthorised CEB to frame rules forobserving electrical safetyobserving electrical safety


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Indian Electricity Rules,Indian Electricity Rules,19561956


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Indian Electricity Rules,Indian Electricity Rules,

Act, 1910Act, 1910

Electricity Act, 2003Electricity Act, 2003 serve e ec r ca sa e yserve e ec r ca sa e y

Monitor voltage at points of supplyMonitor voltage at points of supply

Proper decision in case of disputesProper decision in case of disputes


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--

personspersons

Authorit to maintain loads inAuthorit to maintain loads inexcess of 250 KWexcess of 250 KW


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,, ,, ,,

operationoperation andand maintenancemaintenance ofof electricelectric..

EnsureEnsure safetysafety ofof humans,humans, animalsanimals andand

Material and apparatus to conformMaterial and apparatus to conform

o , s an ar so , s an ar s


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Rule 33Rule 33ar e erm na on onsumersar e erm na on onsumers

premisespremises

Accessible position near point ofAccessible position near point of

Consumer to protect terminalConsumer to protect terminal

rom dama erom dama e


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Rule 34Rule 34ccess y o are on uc orsccess y o are on uc ors

Ensure inaccessibilityEnsure inaccessibility

Provide accessible control switchesProvide accessible control switches


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Rule 35Rule 35anger o cesanger o ces

Sign of skull and bonesSign of skull and bones

Motor, generator, transformerMotor, generator, transformer

All support of high and extraAll support of high and extra--highhighvoltagevoltage

Neon signs and HF installationsNeon signs and HF installations


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Rule 36Rule 36Handling of Electric SupplyHandling of Electric SupplyLines & A aratusLines & A aratus

Safety equipments be provided toSafety equipments be provided toworkmenworkmen

PTW to be adhered to, priorPTW to be adhered to, prioro repa rso repa rs


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Rule 37Rule 37

,,

Ensure efficient control by suitableEnsure efficient control by suitableswitchswitch

Metal rails to be electricallyMetal rails to be electrically

con nuous an ear econ nuous an ear e


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Rule 38Rule 38

apparatusapparatus

eav y nsu a e an a equa e yeav y nsu a e an a equa e yprotectedprotected

Metallic coverin to be earthedMetallic coverin to be earthed

for three phasefor three phase


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Rule 40Rule 40ree oxesree oxes

egu ar nspec onegu ar nspec on

Special key for coverSpecial key for cover


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Rule 43Rule 43

Provisions app ica e to protection equipmentProvisions app ica e to protection equipment

Fire buckets with clean dry sandFire buckets with clean dry sand

Provision of First Aid boxesProvision of First Aid boxes

of capacity > 5 MWof capacity > 5 MW


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Rule 44Rule 44ns ruc ons or es ora onns ruc ons or es ora on

language in conspicuous placelanguage in conspicuous place

Factories Act, 1948Factories Act, 1948

Ensure acquaintance of employeesEnsure acquaintance of employeeswith above instructionswith above instructions


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Rule 44 ARule 44 An ma on o cc enn ma on o cc en

Inspector within 24 hrsInspector within 24 hrs

Detailed report of incidentDetailed report of incidentwithin 48 hrswithin 48 hrs


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Rule 45Rule 45recau ons y onsumers, wners e crecau ons y onsumers, wners e c

undertake electrical installationsundertake electrical installations

Certificate of Competency toCertificate of Competency to

su ervisors and wiremensu ervisors and wiremen

Submission of test reportSubmission of test report


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Rule 46Rule 46er o ca nspec oner o ca nspec on

aymen o eesaymen o ees

Compliance of defectsCompliance of defects

DisconnectionsDisconnections


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Rule 47Rule 47es ng o onsumers ns a a ones ng o onsumers ns a a on

Supp ier to test an inspectSupp ier to test an inspect

Intimate modifications necessaryIntimate modifications necessary

o sa eto sa et


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Rule 47 ARule 47 A

Insta ation an Testing o Generating UnitsInsta ation an Testing o Generating Units

Inspector mandatory for > 10 KWInspector mandatory for > 10 KW


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Rule 48Rule 48egger es segger es s

ressure o vo sressure o vo s

Period of 1 minutePeriod of 1 minute

IR not less than 1 Mega OhmIR not less than 1 Mega Ohm


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Rule 50Rule 50

upp y an se o nergyupp y an se o nergy

Isolators to be providedIsolators to be provided Link switch or breaker orLink switch or breaker orTransformersTransformers

switch/circuit breaker/emergencyswitch/circuit breaker/emergency

Control device to be adjacentControl device to be adjacento mo oro mo or


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Rule 50 ARule 50 A

g se u ngs > m rsg se u ngs > m rs

more than 2.75 mtrsmore than 2.75 mtrs

Power duct to be independentPower duct to be independentrom o er u esrom o er u es

Wiring to conform toWiring to conform toIS standardsIS standards


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Rule 51Rule 51

Provisions or ediu Hi h xtra Hi hProvisions or ediu Hi h xtra Hi hVoltage InstallationsVoltage Installations Conductors to be com letel enclosedConductors to be com letel enclosed

Switchboards shall comply with:Switchboards shall comply with:

FRONT SIDE SWITCH

BOARD

FRONT

CLEARANCE

NOT LESS

THAN 1 METRE


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Rule 51Rule 51

Provisions or ediu Hi h xtra Hi hProvisions or ediu Hi h xtra Hi hVoltage InstallationsVoltage Installations

COMPARTMENT

BOARDFRONT SIDE

EITHER < 20 CM

OR > 75 CM

CLEARANCE

ATLEAST

180 CM

SWITCH

BOARD


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Rule 54Rule 54

ec are o age o upp yec are o age o upp y

--

g o age, y > on eg o age, y > on e

side; or by > 9% on LV sideside; or by > 9% on LV side

Extra Hi h Volta e b > 10% onExtra Hi h Volta e b > 10% on

HV side, or by > 12.5% on LV sideHV side, or by > 12.5% on LV side


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Rule 55Rule 55

ec are requency o upp yec are requency o upp y

>>

r en consen or en consen oconsumerconsumer

* Sanction of State Govt* Sanction of State Govt


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Rule 57Rule 57

e ers, n ca ors e ce ers, n ca ors e c

For EHV consumersFor EHV consumers 1%1% xam na on, es an regu a on oxam na on, es an regu a on o

meters by suppliermeters by supplierMaintenance of register ofMaintenance of register ofmeters by suppliermeters by supplier


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Rule 58Rule 58

o n o ommencemen o upp yo n o ommencemen o upp y

thethe incomingincoming terminalterminal ofof thethe cutcut--outsouts

CUT OUT

TRANSFORMER

ISOLATOR

POINT OF

COMMENCEMENT

OF SUPPLY


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Rule 59Rule 59

recau ons aga ns a ure o supp yrecau ons aga ns a ure o supp y

supply systemsupply system

Submission of Interruption informationSubmission of Interruption information

24 hrs Intimation of Discontinuance24 hrs Intimation of Discontinuance

of supply for improvement / testingof supply for improvement / testing


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Rule 61Rule 61

onnec on w aronnec on w ar The frame of ever enerator stationarThe frame of ever enerator stationar

motor, portable motor, and the metallicmotor, portable motor, and the metallicparts ( not intended as conductors) of allparts ( not intended as conductors) of all

for regulating or controlling energy allfor regulating or controlling energy all

medium volta e ener consumin a aratusmedium volta e ener consumin a aratusshall be earthed by theshall be earthed by theowner by two separate and distinctowner by two separate and distinct

. . Record of earth test to be maintainedRecord of earth test to be maintainedb su lier/owner earth test not oreb su lier/owner earth test not orethan 1 Ohm)than 1 Ohm)


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Rule 61 ARule 61 A

ar ea age ro ec ve ev cear ea age ro ec ve ev ce

rov s on o ar ea age c rcurov s on o ar ea age c rcu

breaker mandatory for loads > 5 KWbreaker mandatory for loads > 5 KW


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Rule 63Rule 63

pprova y nspec orpprova y nspec or

Written approval of ElectricalWritten approval of Electrical

installationsinstallations

Required tests of installation byRequired tests of installation by

owner prior to inspectionowner prior to inspection


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Rule 64Rule 64

Use of ener at HV/EHVUse of ener at HV/EHVVoltage ClassVoltage Class Ground ClearanceGround Clearance

(Metres)(Metres)

SectionalSectional

ClearanceClearance

Not exceedingNot exceeding 11 KV11 KV 2.752.75 2.62.6

-- dodo -- 33 KV33 KV 3.73.7 2.82.8

-- dodo -- 66 KV66 KV 4.04.0 3.03.0

-- dodo -- 132 KV132 KV 4.64.6 3.53.5-- dodo -- 220 KV220 KV 5.55.5 4.34.3

-- dodo -- 400 KV400 KV 8.08.0 6.56.5

In oor oi ie trans ormers not to e on any oorabove ground or below first basement

oa p o e prov e or rans or ers av ng >ltrs oil


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Suitable interlocks to be providedSuitable interlocks to be provided

Protection to be provided forProtection to be provided fordisconnection under abnormaldisconnection under abnormalconditionsconditions


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Rule 65Rule 65

es ng, pera on an a n enancees ng, pera on an a n enance

Production of ManufacturersProduction of Manufacturerses cer ca e, nsu a on res s ancees cer ca e, nsu a on res s ance

test, Earth resistance test,test, Earth resistance test,,,

etc mandatory prior to approvaletc mandatory prior to approvalII


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Rule 67Rule 67

onnec on w aronnec on w ar

--

associated with HV / EHV installationassociated with HV / EHV installation

grounding systemgrounding system

transformer shall be earthed bytransformer shall be earthed by


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Rule 68Rule 68

Control of EnergyControl of Energy

Provision of ventilation and drainageProvision of ventilation and drainagemandator for under round submandator for under round sub--stationsstations

Outdoor subOutdoor sub--station to bestation to be

not < 1.8 mtrs in heightnot < 1.8 mtrs in height


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Rule 70Rule 70

on enserson ensers

automatic discharge of every staticautomatic discharge of every static

supplysupply

R l 77R l 77


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Rule 77Rule 77Clearance above ground of lowest conductorClearance above ground of lowest conductor

Clearance other thanClearance other than

along the road oralong the road or

VoltageVoltage

road inroad in

mtrsmtrs

road inroad in

mtrs.mtrs.

across t e roa .across t e roa .

BareBareConductConduct

InsulatedInsulatedConduCondu

oror ctorctor

Low & mediumLow & medium

voltagevoltage5.85.8 5.55.5 4.64.6 4.04.0

High Voltage up toHigh Voltage up to

11 KV11 KV6.16.1 5.65.6 4.64.6 4.04.0

High Voltage aboveHigh Voltage above11 KV but up to11 KV but up to

33 KV33 KV

6.16.1 5.85.8 5.25.2 --

For EHV lines, clearance not < 5.182 mtrs plus 0.305 mtrs for ever

33,000 volts or part thereof by which voltage of line exceeds 33,000


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Rule 79 & 80Rule 79 & 80

earance rom u ngsearance rom u ngsVerticalVertical

VoltageVoltage (In(Inmtrs.)mtrs.)

or zon aor zon a

(In mtrs.)(In mtrs.)

owow me umme um vo agevo age .. ..

ForFor HighHigh VoltageVoltage lineslines upup toto 3.73.7 1.2191.219

ForFor HighHigh VoltageVoltage lineslines aboveabove 3.73.7 2.02.0..

voltsvoltsForFor extraextra highhigh voltagevoltage lineslines 3.73.7 2.02.0

ForFor everyevery additionaladditional 3300033000

voltsvolts oror partpart thereofthereof

0.30.3 0.30.3


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Rule 87Rule 87

earance or ver ea nes ross ngearance or ver ea nes ross ng

VoltageVoltagelevellevel

11 KV11 KV 22 KV 22 KV 33 KV 33 KV6666

KVKV110110

KVKV132132

KVKV220220

KVKV

250 V/250 V/

650650 2.442.44 2.442.44 2.442.44 2.442.44 2.752.75 3.053.05 4.584.58

22KV/33K22KV/33K

V/66KVV/66KV 2.752.75 2.752.75 2.752.75 2.752.75 2.752.75 2.752.75

/110KV/110KV

132 KV132 KV 3.053.05 3.053.05 3.053.05 3.053.05 3.053.05 3.053.05 3.053.05

220 KV220 KV 4.584.58 4.584.58 4.584.58 4.584.58 4.584.58 4.584.58 4.584.58


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Rule 90Rule 90

ar ng o ver ea near ng o ver ea ne All metal su orts and all reinforced andAll metal su orts and all reinforced and

prestressed cement concrete support ofprestressed cement concrete support ofoverhead lines and metallic fittingsoverhead lines and metallic fittingsattached thereto shall be er anentl andattached thereto shall be er anentl andefficiently earthed. For this purpose aefficiently earthed. For this purpose acontinuous earth wire shall becontinuous earth wire shall be

pole and connected with earth ordinarilypole and connected with earth ordinarilyat three points in every K.M. theat three points in every K.M. the

as nearly equidistance as possible.as nearly equidistance as possible.Alternatively each support and theAlternatively each support and the

be efficiently earthed.be efficiently earthed.

ll


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Rule 91Rule 91

a e y an ro ec ve ev cesa e y an ro ec ve ev ces

very over ea ine erecte over anyvery over ea ine erecte over anypart of street or other public place orpart of street or other public place orin any actory or mine or on anyin any actory or mine or on any

consumers premises shall be protectedconsumers premises shall be protectedwit a evice approve ywit a evice approve ythe Inspector for rendering thethe Inspector for rendering the

ne e ectr ca y arm ess n case tne e ectr ca y arm ess n case tbreaks.breaks.

R l 92R l 92


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Rule 92Rule 92

ro ec on aga ns g n ngro ec on aga ns g n ng

Owner of every overhead line which is soOwner of every overhead line which is soexposed as to be liable for injury fromexposed as to be liable for injury fromg n ng, s a a op e c en means org n ng, s a a op e c en means or

diverting to earth,diverting to earth,

Rule 94 to 108 : Electric Traction


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Rule 94 to 108 : Electric Traction

Rule 109 to 132 : Additional Precautionto be adopted in Minesand Oil ields

Rule 133 : Relaxation by

Rule 134 : Relaxation byInspector

Rule 138 : Penalt or breach o

rule 44A,45,82,77,79or 80.

Rule 143 : Repeal


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Employees handling manEmployees handling man--cooler fans while incooler fans while inoperationoperation

Employees other than electrical handlingEmployees other than electrical handlingelectrical switches like use MCB MCCB &electrical switches like use MCB MCCB &othersothers

during emergenciesduring emergencies

ByBy--passing sa ety imits & inter oc spassing sa ety imits & inter oc spermanentlypermanently


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Use of meters without knowing the basicsUse of meters without knowing the basics

metersmeters

Improper jointing of cables & without insulationImproper jointing of cables & without insulation

Use of columns as neutral for lightingUse of columns as neutral for lighting Mixing of different voltage wires especiallyMixing of different voltage wires especially

Use of structure column as ground for weldingUse of structure column as ground for welding

C S dC S d II


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Case StudyCase Study -- II Fatal accident at MIDC Kurkumbh, Dist: Pune onFatal accident at MIDC Kurkumbh, Dist: Pune on

15 Sep 200115 Sep 2001

Companies involved : OKASA Chemicals, VASCONCompanies involved : OKASA Chemicals, VASCONEn ineers Technimont ICB Mumbai & MSEBEn ineers Technimont ICB Mumbai & MSEB

Transportation of foldable aluminium ladderTransportation of foldable aluminium ladderun er over ea neun er over ea ne

--

scrutinisedscrutinised


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HEIGHT OF LADDER

5.8 MTRS11 KV LINE

MINIMUM REQUIRED

CLEARANCE

FROM GROUND 5.8

MTRS.

NO HAND GLOVES,

SAFETY BELT OR SAFETY

ACTUAL CLEARANCE DUETO CONSTRUCTION

OF ROAD 5.5 MTRS

Case StudyCase Study II


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Case StudyCase Study -- II

Violation of Rule 82 AViolation of Rule 82 A No bars or conducting materialNo bars or conducting materialto be brought in vicinity of bare overhead lines withoutto be brought in vicinity of bare overhead lines without

I I

Violation of Rule 36Violation of Rule 36 Every person working on electricEvery person working on electricsupply line or its vicinity to be provided with handsupply line or its vicinity to be provided with hand

Violation of Rule 77Violation of Rule 77 Minimum clearance of 11 KV lineMinimum clearance of 11 KV line

to be 5.8 mtrs (Okasa Chemicals)to be 5.8 mtrs (Okasa Chemicals) Violation of Rule 82Violation of Rule 82 Prior notice to supplyPrior notice to supply

company and electrical inspector (Okasa Chemicals)company and electrical inspector (Okasa Chemicals)

Case StudyCase Study II


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Case StudyCase Study -- II

Violation of Rule 50Violation of Rule 50 Faulty circuit breaker at 33Faulty circuit breaker at 33susu --s a ons a on

Violation of Rule 90Violation of Rule 90 No earthing to 11 KV polesNo earthing to 11 KV poles

Violation of Rule 82Violation of Rule 82 -- Prior notice to supplyPrior notice to supply

company and electrical inspector (Vasconcompany and electrical inspector (VasconEngineers)Engineers)

o e:o e:-- ow ause no ces serve o a ourow ause no ces serve o a our

companiescompanies

C St dC St d IIII


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Case StudyCase Study -- IIII

Explosion of B.E.S.T transformer at Mumbadevi inExplosion of B.E.S.T transformer at Mumbadevi inOct 1990Oct 1990

Resulted in death of seven personsResulted in death of seven persons

Actions during investigation:Actions during investigation:--

-- Statements o a concerneStatements o a concerne

-- History sheets of various transformer locationsHistory sheets of various transformer locations

---- Site test resultsSite test results

Case StudyCase Study IIII


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Conclusions of investigationsConclusions of investigations

-- Dielectric stren th of oil 24 kv as a ainstDielectric stren th of oil 24 kv as a ainstrequired >40 kvrequired >40 kv

-- Poor Viscosity & Specific gravity of oilPoor Viscosity & Specific gravity of oil

-- Improper encing aroun trans ormerImproper encing aroun trans ormer

-- Transformer more thanTransformer more than 3535 yrs oldyrs old

-- Rule 29 of IE Rules 1956Rule 29 of IE Rules 1956

--

-- Rule 68 of IE Rules 1956Rule 68 of IE Rules 1956-- National Electric CodeNational Electric Code

Case StudyCase Study IIII


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ResponsibilityResponsibility Since defects in maintenance ofSince defects in maintenance of

various subvarious sub--stations were observed, impliedstations were observed, implied

OrganisationOrganisation

Role of LicenseesRole of Licensees


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All the Engineers or persons in the commercial sideAll the Engineers or persons in the commercial sideshall be trained in the observance of the relevantshall be trained in the observance of the relevant

. .

Before releasing the Electric supply, the testBefore releasing the Electric supply, the testreport given by the licensed Electrical contractorreport given by the licensed Electrical contractors ou e care u y scrutinize regar ing t es ou e care u y scrutinize regar ing t eI.R.Test, earth test etc.I.R.Test, earth test etc.

If the test re ort is erroneous or the inte rit ofIf the test re ort is erroneous or the inte rit ofthe LEC is doubtful the matter shall be referredthe LEC is doubtful the matter shall be referredto the Electrical Inspector before release ofto the Electrical Inspector before release ofsu l .su l .

If there is a dispute between two contractors forIf there is a dispute between two contractors forthe same installation, their agreement papers withthe same installation, their agreement papers with

observance of Rule 45.observance of Rule 45.


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Before giving quotation to the consumer forBefore giving quotation to the consumer forelectric supply, Annexure 6 of the Rule 27 forelectric supply, Annexure 6 of the Rule 27 for

..be referred.be referred.

Before release of supply to any IndividualBefore release of supply to any Individual

/corporation should be seen for the sanctioned/corporation should be seen for the sanctionedload of the Installation comparable to the testload of the Installation comparable to the test

report of the same.report of the same. The supply company should also verify whether theThe supply company should also verify whether the

N.O.C. from the Electrical Inspector is obtainedN.O.C. from the Electrical Inspector is obtainedas per Rule 50 A, Rule 63 before releasing theas per Rule 50 A, Rule 63 before releasing thesupp y or u ngs av ng e g more ansupp y or u ngs av ng e g more anmetres and High tension installations respectively.metres and High tension installations respectively.

For releasing supply to the theatres, AuditoriumsFor releasing supply to the theatres, Auditoriums..

Maharashtra cinema Rules,1966 must be obtained.Maharashtra cinema Rules,1966 must be obtained.

Role of LicenseesRole of Licensees


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or re eas ng e orary su y o anyor re eas ng e orary su y o anyEntertainment programme or places of publicEntertainment programme or places of publicamusement NOC from the Electrical Inspectoramusement NOC from the Electrical Inspector

un er u e o e u es or cens ng anun er u e o e u es or cens ng an

controlling places of public amusement should becontrolling places of public amusement should beobtained.obtained. The licensee should also be aware of theThe licensee should also be aware of the

Development control rules (DC Rules) of localDevelopment control rules (DC Rules) of local

bodies re ardin the location and dimensions of thebodies re ardin the location and dimensions of theMeter rooms for monitoring the meter readingMeter rooms for monitoring the meter readingalong with its proper maintenance.along with its proper maintenance.

42 242 2

consumers redressal forum is to be establishedconsumers redressal forum is to be establishedby every licensee for resolving their grievances.by every licensee for resolving their grievances.

licensees area should be reported to the Electricallicensees area should be reported to the Electrical

Inspector in the prescribed from as per Rule 59.Inspector in the prescribed from as per Rule 59.


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Outages or shutdowns if any shall be taken onlyOutages or shutdowns if any shall be taken only

about its duration & scope as laid down in rule 59.about its duration & scope as laid down in rule 59.

erm o wor sys em mus e o owe n aerm o wor sys em mus e o owe n asorts of outages as laid down in Rule 36 ofsorts of outages as laid down in Rule 36 of

I.E.Rule 56.I.E.Rule 56.

Before raising any supplementary bill on account ofBefore raising any supplementary bill on account of, ,, ,

the consumers say should also be heard patientlythe consumers say should also be heard patientlyby the Engineers doing the assessment.by the Engineers doing the assessment.


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I thank you for yourpatient hearing


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ny ues ons

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