focus four module1

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Focus Four Hazard TrainingFocus Four Hazard Training

For Masonry ConstructionFor Masonry Construction

Module 1 - Electrical SafetyModule 1 - Electrical Safety

Susan Harwood Grant Training ProgramSusan Harwood Grant Training Program


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Disclaimer!sage "otesDisclaimer!sage "otesThis material was produced under grant number SH-17793-SH8 from the OccupationalThis material was produced under grant number SH-17793-SH8 from the Occupational

Safety and Health dministration! "#S# $epartment of %abor# &t does not necessarilySafety and Health dministration! "#S# $epartment of %abor# &t does not necessarily

reflect the 'iews or policies of the "#S# $epartment of %abor! nor does mention of tradereflect the 'iews or policies of the "#S# $epartment of %abor! nor does mention of tradenames! commercial products! or organi(ations imply endorsement by the "#S#names! commercial products! or organi(ations imply endorsement by the "#S#

)o'ernment#)o'ernment#

&mages shown may depict situations that are not in compliance with applicable OSH&mages shown may depict situations that are not in compliance with applicable OSH

re*uirements# These photos are clearly mar+ed as non-compliant#re*uirements# These photos are clearly mar+ed as non-compliant#

&t is not the intent of ,& to pro'ide compliance-based training in this presentation! the&t is not the intent of ,& to pro'ide compliance-based training in this presentation! the

intent is more to address .ocus .our ha(ard awareness in the masonry constructionintent is more to address .ocus .our ha(ard awareness in the masonry construction

industry! and to recogni(e o'erlapping ha(ards present in many construction wor+places#industry! and to recogni(e o'erlapping ha(ards present in many construction wor+places#

&t is the responsibility of the employer! its subcontractors! and its employees to comply&t is the responsibility of the employer! its subcontractors! and its employees to comply

with all pertinent rules and regulations in the /urisdiction in which they wor+# 0opies of allwith all pertinent rules and regulations in the /urisdiction in which they wor+# 0opies of all

OSH regulations are a'ailable fromOSH regulations are a'ailable from www#osha#go'www#osha#

go'#This presentation is intended to#This presentation is intended todiscuss .ederal regulations only# &f this training is held in a state that is operating underdiscuss .ederal regulations only# &f this training is held in a state that is operating under

an OSH-appro'ed State lan! State OSH re*uirements for that state must be includedan OSH-appro'ed State lan! State OSH re*uirements for that state must be included

in the training# &t is assumed that indi'iduals using this presentation or content toin the training# &t is assumed that indi'iduals using this presentation or content to

augment their training programs will be 2*ualified2 to do so#augment their training programs will be 2*ualified2 to do so#

Developed under an OSHA Susan Harwood Grant, #Developed under an OSHA Susan Harwood Grant, # SH-17793-SH8, bySH-17793-SH8, bythe o!"y ounta$n asonry %nst$tute, Denver, &oloradothe o!"y ounta$n asonry %nst$tute, Denver, &olorado
http://www.osha.gov/http://www.osha.gov/http://www.osha.gov/http://www.osha.gov/http://www.osha.gov/http://www.osha.gov/


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Training #$%ecti&esTraining #$%ecti&es

'fter com(leting t)is unit* you will+'fter com(leting t)is unit* you will+' ,e familiar wit) t)e $asic conce(ts of,e familiar wit) t)e $asic conce(ts of

electricityelectricity

' !nderstand t)e (otential effects of!nderstand t)e (otential effects ofelectricity on t)e )uman $odyelectricity on t)e )uman $ody

' ,e a$le to recognize common electrical,e a$le to recognize common electrical

)azards associated wit) masonry wor.)azards associated wit) masonry wor.

' ,e familiar wit) electrical (rotecti&e,e familiar wit) electrical (rotecti&ede&icesde&ices

' ,e .nowledgea$le of safe wor. (ractices,e .nowledgea$le of safe wor. (ractices

Masonry Electrical SafetyMasonry Electrical Safety 1//S!,P'0T


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0eferences0eferences

2 CF0 1234556 Su$(art /2 CF0 1234556 Su$(art /

"ational Electric Code 7"EC8"ational Electric Code 7"EC8

/S!,P'0T

Masonry Electrical SafetyMasonry Electrical Safety


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Ta.e Electricity SeriouslyTa.e Electricity Seriously

Electricity is t)eElectricity is t)e second leadingsecond leadin

gcause of deathcause of deathin constructionin construction

Electrocutions ma.e u( 19 ofElectrocutions ma.e u( 19 ofconstruction fatalities annuallyconstruction fatalities annually

#&er :5*555 non-fatal s)oc.s occur#&er :5*555 non-fatal s)oc.s occur

eac) yeareac) year #&er 355 deat)s occur annually#&er 355 deat)s occur annually

due to electrocutiondue to electrocution

Masonry Electrical SafetyMasonry Electrical Safety :/S!,P'0T

Source+ ,ureau of ;a$or Statistics


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Electrical 'ccidentsElectrical 'ccidents

;eading Causes of Electrical 'ccidents+;eading Causes of Electrical 'ccidents+' Drilling and cutting t)roug) ca$lesDrilling and cutting t)roug) ca$les

' !sing defecti&e tools* ca$les and etension cordsMissing ground (rongs on e>tension cords

Masonry Electrical SafetyMasonry Electrical Safety 4/S!,P'0T


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Hazards of ElectricityHazards of Electricity

Shoc+Shoc+? Most common and can cause electrocution or? Most common and can cause electrocution ormuscle contraction leading to secondary in%ury w)ic)muscle contraction leading to secondary in%ury w)ic)includes fallsincludes falls

.ires.ires? Enoug) )eat or s(ar.s can ignite com$usti$le? Enoug) )eat or s(ar.s can ignite com$usti$lematerialsmaterials

4plosions4plosions? Electrical s(ar. can ignite &a(ors in t)e? Electrical s(ar. can ignite &a(ors in t)eairair

rc .lashrc .lash - can cause $urns ranging from 14*555can cause $urns ranging from 14*555degrees f to :@*555 degrees fdegrees f to :@*555 degrees f

rc 5lastrc 5last? =n a s)ort circuit e&ent co((er can e>(and=n a s)ort circuit e&ent co((er can e>(and

3A*555 times T)e e>(ansion causes a (ressure wa&e3A*555 times T)e e>(ansion causes a (ressure wa&e

'ir also e>(ands adding to t)e (ressure wa&e'ir also e>(ands adding to t)e (ressure wa&e

Masonry Electrical SafetyMasonry Electrical Safety @/S!,P'0T


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Fundamentals of ElectricityFundamentals of Electricity

;i.e Bater =n ' Garden Hose;i.e Bater =n ' Garden Hose

Masonry Electrical SafetySafety 3/S!,P'0T

Current Flow 0ateCurrent Flow 0ate

E>am(le ? 1@ gallons (er minuteE>am(le ? 1@ gallons (er minute

0esistance Diameter of Hose0esistance Diameter of Hose

E>am(le ? ;arger )ose 7less resistance8*E>am(le ? ;arger )ose 7less resistance8*more water flowsmore water flows

oltage Bater Pressureoltage Bater PressureE>am(le ? 4@ PS=E>am(le ? 4@ PS=

FlowofBaterFlowofBater


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Fundamentals of ElectricityFundamentals of Electricity

ElectricalElectrical currentcurrentis t)e flow ofis t)e flow of

electrons t)roug) a conductorelectrons t)roug) a conductor

'' conductorconductoris a material t)at allowsis a material t)at allowselectrons to flow t)roug) itelectrons to flow t)roug) it

'n'n insulatorinsulatorresists t)e flow ofresists t)e flow of

electronselectrons 0esistance0esistanceo((oses electron flowo((oses electron flow

Masonry Electrical SafetyMasonry Electrical Safety A/S!,P'0T

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Current Flows in aCurrent Flows in a

;oo( or Circuit;oo( or Circuit Circuits are 'CCircuits are 'C

7alternating current8 or7alternating current8 orDC 7direct current8DC 7direct current8

Current is usually 'CCurrent is usually 'C

'C current )as fi&e'C current )as fi&e(arts+(arts+

718 Electrical source718 Electrical source78 H#T wire to t)e tool78 H#T wire to t)e tool

7:8 T)e tool itself7:8 T)e tool itself

748 "E!T0'; wire returns748 "E!T0'; wire returnselectricity from t)e toolelectricity from t)e tool

7@8 G0#!"D7@8 G0#!"D

Masonry Electrical SafetyMasonry Electrical Safety /S!,P'0T

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How S)oc.s #ccurHow S)oc.s #ccur Current tra&els in closed circuitsCurrent tra&els in closed circuits

t)roug) conductors 7water* metal*t)roug) conductors 7water* metal*

t)e )uman $ody8t)e )uman $ody8

S)oc. occurs w)en t)e $odyS)oc. occurs w)en t)e $ody

$ecomes a (art of t)e circuit$ecomes a (art of t)e circuit

Current enters at one (oint Current enters at one (oint

lea&es at anot)erlea&es at anot)er


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S)oc.s #ccur inS)oc.s #ccur in

T)ree BaysT)ree Bays Contact wit) $ot)Contact wit) $ot)

conductorsconductors

Contact wit) oneContact wit) oneconductor andconductor and

groundground

Bit) a tool+ contactBit) a tool+ contact

wit) )ot metal (artwit) )ot metal (art

and ground 718* 78 and ground 718* 78

7:87:8


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Se&erity of t)e S)oc.Se&erity of t)e S)oc.

Se&erity of t)e S)oc. de(ends on+Se&erity of t)e S)oc. de(ends on+

' 'mount of current'mount of current

(Determined $y &oltage and resistance toDetermined $y &oltage and resistance toflowflow

' Pat) t)roug) t)e $odyPat) t)roug) t)e $ody

' Duration of flow t)roug) t)e $odyDuration of flow t)roug) t)e $ody

' #t)er factors suc) as general )ealt)#t)er factors suc) as general )ealt)

and indi&idual differencesand indi&idual differences


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He sweats - and )e diesHe sweats - and )e dies;uling* ;a - ' man was electrocuted w)en )is;uling* ;a - ' man was electrocuted w)en )is

sweat dri((ed into t)e electric drill )e was usingsweat dri((ed into t)e electric drill )e was using

to $uild a swing set in )is $ac.yard* t)e coronerto $uild a swing set in )is $ac.yard* t)e coroner

saidsaid

0ic)ard Miller was (ronounced dead0ic)ard Miller was (ronounced deadSunday at St C)arles Hos(ital* said Da&id ial*Sunday at St C)arles Hos(ital* said Da&id ial*

St C)arles Paris) coroner Miller* @4* )ad $eenSt C)arles Paris) coroner Miller* @4* )ad $een

using an electric drill in 25 degree )eat* ial saidusing an electric drill in 25 degree )eat* ial said

MondayMonday

'((arently t)e man was sweating'((arently t)e man was sweating(rofusely* ial said He (ro$a$ly was (us)ing(rofusely* ial said He (ro$a$ly was (us)ing

against t)e drill wit) )is c)est and )isagainst t)e drill wit) )is c)est and )is

(ers(iration went into t)e drill itself and made a(ers(iration went into t)e drill itself and made a

contactcontact

T)e 'ssociated PressT)e 'ssociated Press


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Effects of Current FlowEffects of Current Flow

More t)an : milliam(s 7ma8+More t)an : milliam(s 7ma8+ (ainful s)oc.(ainful s)oc. More t)an 15 ma+More t)an 15 ma+ muscle contractionmuscle contraction More t)an 5 ma+More t)an 5 ma+ considered se&ere s)oc.considered se&ere s)oc.

More t)an :5 ma+More t)an :5 ma+ lung (aralysislung (aralysis - usually- usuallytem(orarytem(orary

More t)an @5 ma+More t)an @5 ma+ (ossi$le &entricular(ossi$le &entricularfi$rillationfi$rillation7usually fatal87usually fatal8

155 ma to 4 am(s+155 ma to 4 am(s+ certain &entricular fi$rillationcertain &entricular fi$rillation7fatal87fatal8

#&er 4 am(s+#&er 4 am(s+ )eart (aralysis6 se&ere $urns)eart (aralysis6 se&ere $urns

Masonry Electrical SafetyMasonry Electrical Safety 1:/S!,P'0T

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!sing a 15 &olt circuit and resistance!sing a 15 &olt circuit and resistance

for wet dry s.in+for wet dry s.in+


E=0E=0+ oltageCurrent > 0esistance+ oltageCurrent > 0esistance

7olts8 7'm(s8 7#)ms87olts8 7'm(s8 7#)ms8

So+So+ =E0=E0

Dry S.in 15155*555551 am(sDry S.in 15155*555551 am(s

1ma1maflowing t)roug)flowing t)roug)

$ody to ground$ody to ground

Bet s.in 15155515 am(sBet s.in 15155515 am(s 15ma15maflowing t)roug)flowing t)roug)

$ody to ground $ody to ground

,emember,emember66 1 mp 1 milliamps1 mp 1 milliamps

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Masonry Electrical SafetyMasonry Electrical Safety 1@/S!,P'0T

Effects of Current FlowEffects of Current Flow

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Controlling Electrical HazardsControlling Electrical Hazards

Em(loyers must follow t)e #SH'Em(loyers must follow t)e #SH'

Electrical Standards 7Su$(art /8Electrical Standards 7Su$(art /8

Electrical installationElectrical installation Su$(art / includes four (roacti&eSu$(art / includes four (roacti&e

met)ods+met)ods+

' Electrical =solationElectrical =solation

' E


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Electrical =solationElectrical =solation

Be can $e safe $y .ee(ing electricityBe can $e safe $y .ee(ing electricityaway from us Be can+away from us Be can+

' =nsulate=nsulatet)e conductorst)e conductors( E>am(le+ T)e insulation on e>tension cordsE>am(le+ T)e insulation on e>tension cords

' Ele&ateEle&atet)e conductorst)e conductors( E>am(le+ #&er)ead (owerlinesE>am(le+ #&er)ead (owerlines

'GuardGuard t)e conductors $y enclosing t)emt)e conductors $y enclosing t)em( E>am(le+ 0ece(tacle co&ers* $o>es* E>am(le+ 0ece(tacle co&ers* $o>es*

conduitconduit))

Masonry Electrical SafetyMasonry Electrical Safety 1A/S!,P'0T

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=nsulating t)e Conductors=nsulating t)e Conductors T)e first way to safeguard wor.ersT)e first way to safeguard wor.ers

from electrically energized wires isfrom electrically energized wires is

t)roug)t)roug) insulationinsulation

0u$$er and (lastic is (ut on wires to0u$$er and (lastic is (ut on wires to(re&ent s)oc.* fires* s)ort circuits(re&ent s)oc.* fires* s)ort circuits

and for strain reliefand for strain relief

=t is always necessary to c)ec. t)e=t is always necessary to c)ec. t)e

insulation on e


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Masonry Electrical SafetyMasonry Electrical Safety 5/

Defecti&e E>tension CordsDefecti&e E>tension Cords

12

P)otos de(ict )azardous conditionP)otos de(ict )azardous condition

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Defecti&e Cord =ncidentDefecti&e Cord =ncident

Bor.er attem(ted toBor.er attem(ted toclim$ scaffold wit)clim$ scaffold wit)electric drillelectric drill

DrillJs cord wasDrillJs cord wasdamaged wit) $aredamaged wit) $arewires s)owingwires s)owing

T)e $are wire contactedT)e $are wire contactedt)e scaffoldingt)e scaffolding

T)e wor.er diedIT)e wor.er diedI


De(icts )azardous conditionDe(icts )azardous condition

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Ele&ating t)e ConductorsEle&ating t)e Conductors T)e second way to safeguard wor.ersT)e second way to safeguard wor.ers

from electrically energized wires is $yfrom electrically energized wires is $y

ele&atingele&atingt)emt)em

Bires are often ele&ated $y t)e (owerBires are often ele&ated $y t)e (ower

com(anycom(any =t is always necessary to c)ec. t)e=t is always necessary to c)ec. t)e

location of o&er)ead lines $efore youlocation of o&er)ead lines $efore you

$egin wor. eac) day$egin wor. eac) day

0emem$er* ne&er allow yourself* your0emem$er* ne&er allow yourself* yourtools* or t)e materials you are wor.ingtools* or t)e materials you are wor.ing

wit) to $e wit)inwit) to $e wit)in 1 feet1 feetof energized linesIof energized linesI


P)oto de(icts )azardous conditionP)oto de(icts )azardous condition

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Bor.ing "ear #&er)ead ;inesBor.ing "ear #&er)ead ;ines

Clearance of wor.er and anyClearance of wor.er and anye


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#&er)ead ;ine =ncident#&er)ead ;ine =ncident

' wor.er was' wor.er wasattem(ting toattem(ting tomo&e mo$ilemo&e mo$ile

scaffoldscaffold Scaffold madeScaffold made

contact wit)contact wit)

A55 &olt lineA55 &olt line T)e wor.er diedT)e wor.er died

Masonry Electrical SafetyMasonry Electrical Safety :/


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Guarding t)e ConductorsGuarding t)e Conductors T)e t)ird way to safeguard wor.ers fromT)e t)ird way to safeguard wor.ers from

electrically energized wires is $yelectrically energized wires is $yguardingguardingt)emt)em

Co&ers* $o>es* and enclosures are oftenCo&ers* $o>es* and enclosures are often(ut around conductors to (re&ent(ut around conductors to (re&entwor.er contactwor.er contact

=t is always necessary to c)ec. t)at=t is always necessary to c)ec. t)atelectrical $o>es and (anels are co&eredelectrical $o>es and (anels are co&eredand free from missing .noc.-outsand free from missing .noc.-outs

0emem$er* electric e


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Masonry Electrical SafetyMasonry Electrical Safety @/

Guarding t)e ConductorsGuarding t)e Conductors


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Guarding t)e ConductorsGuarding t)e Conductors


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E


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Can Kou 0ely on GroundingLCan Kou 0ely on GroundingL

GroundingGrounding will not wor+will not wor+if t)eif t)e

electricity can flow t)roug) you moreelectricity can flow t)roug) you more

easily t)an t)e ground T)is caneasily t)an t)e ground T)is can)a((en w)en+)a((en w)en+

'Kour tool doesnJt )a&e a ground (inKour tool doesnJt )a&e a ground (in

'KouJre wor.ing in wet locationsKouJre wor.ing in wet locations

'KouJre touc)ing a metal o$%ectKouJre touc)ing a metal o$%ect

Masonry Electrical SafetyMasonry Electrical Safety /

M El i l S f/S!,P'0T


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B)at Must $e GroundedLB)at Must $e GroundedL

'll circuits and'll circuits and

e>tension cordse>tension cords

'll noncurrent carrying'll noncurrent carryingmetal (artsmetal (arts

Porta$le semi-(orta$lePorta$le semi-(orta$le

tools and e


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Masonry Electrical SafetyMasonry Electrical Safety :5/

Do "ot Eliminate t)e GroundIDo "ot Eliminate t)e GroundI

Kou $ecome t)e ne>t-$est (at) for currentIKou $ecome t)e ne>t-$est (at) for currentI


M El t i l S f tM El t i l S f t/S!,P'0T


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Masonry Electrical SafetyMasonry Electrical Safety :1/

Do "ot 0e&erse PolarityDo "ot 0e&erse Polarity

T)e (rongs are differentT)e (rongs are different

sized so you canJt turnsized so you canJt turn

t)e (lug around =f yout)e (lug around =f you

do* t)e electrical fieldsdo* t)e electrical fields

wit)in t)e motor are alwayswit)in t)e motor are always

energized =f t)ere isenergized =f t)ere is

moisture (resent* t)e casemoisture (resent* t)e case

is li.ely to $e )ot E&enis li.ely to $e )ot E&en

wit) dou$le-insulated tools*wit) dou$le-insulated tools*you still could get a s)oc.you still could get a s)oc.


M El t i l S f tM El t i l S f t/S!,P'0T

:


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Circuit =nterru(tionCircuit =nterru(tion Be can $e safer $y automatically s)uttingBe can $e safer $y automatically s)utting

off t)e flow of electricity in t)e e&ent ofoff t)e flow of electricity in t)e e&ent oflea.age* o&erload* or s)ort circuitlea.age* o&erload* or s)ort circuit

Ground Fault Circuit =nterru(ters 7GFC=8Ground Fault Circuit =nterru(ters 7GFC=8are circuit (rotection 7or o&ercurrent8are circuit (rotection 7or o&ercurrent8de&ices t)at (rotect you* t)e wor.erde&ices t)at (rotect you* t)e wor.er

Circuit $rea.ers fuses (rotectCircuit $rea.ers fuses (rotect

e


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Circuit Protecti&e De&icesCircuit Protecti&e De&ices

Circuit ,rea.ers and FusesCircuit ,rea.ers and Fuses' #nly#nlyprotect the building! e*uipment!protect the building! e*uipment!

and toolsand toolsfrom )eat $uild-u(Ifrom )eat $uild-u(I

' "e&er de(end on circuit $rea.ers or"e&er de(end on circuit $rea.ers orfuses to (re&ent s)oc.sIfuses to (re&ent s)oc.sI

Ground Fault Circuit =nterru(terGround Fault Circuit =nterru(ter

7GFC=87GFC=8' =s t)e only de&ice w)ic) will=s t)e only de&ice w)ic) will protect theprotect the

wor+erwor+erfrom s)oc. and electrocutionIfrom s)oc. and electrocutionI

Masonry Electrical SafetyMasonry Electrical Safety ::/

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GFC= ProtectionGFC= Protection

'll tem(orary circuits are re


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How a GFC= Bor.sHow a GFC= Bor.s

/ Masonry Electrical SafetyMasonry Electrical Safety :@

T)e GFC= detectsT)e GFC= detects

lea.ageJ of 4-3lea.ageJ of 4-3

milliam(s o(ensmilliam(s o(ens

t)e circuit in 145t)e circuit in 145t)t)

of a secondof a second

=t=t willwillwor. wit)outwor. wit)out

t)e ground (lugt)e ground (lug

$ut$ut notnot fastfast

enoug) ifenoug) if youyouareare

t)e ground t)e ground

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M El t i l S f tMasonry Electrical Safety :3


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Ty(es of GFC= ProtectionTy(es of GFC= Protection

/ Masonry Electrical SafetyMasonry Electrical Safety :3

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Masonr Electrical SafetMasonry Electrical Safety :A


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Ty(es of GFC= ProtectionTy(es of GFC= Protection

/ Masonry Electrical SafetyMasonry Electrical Safety :A

' GFC= $rea.er must $e installed to (rotect' GFC= $rea.er must $e installed to (rotect

wor.ers using 5 masonry sawswor.ers using 5 masonry saws

Masonry Electrical SafetyMasonry Electrical Safety/S!,P'0T

:


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Masonry Electrical SafetyMasonry Electrical Safety/ :

GFC= TestersGFC= Testers

Masonry Electrical SafetyMasonry Electrical Safety :2/S!,P'0T


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'ssured E mont)s for rece(tacles't least e&ery si> mont)s for rece(tacles

0esults recorded - e


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C)ec.ing for Ground ContinuityC)ec.ing for Ground Continuity

;hat else we should we notice here


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Tem(orary BiringTem(orary Biring

T)ere must $e se(arate circuits forT)ere must $e se(arate circuits forelectric tools and lig)ting* eac)electric tools and lig)ting* eac)la$eled as suc)la$eled as suc)

;ig)t circuits do not re


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Permanent E


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E>tension Cords and Ca$lesE>tension Cords and Ca$les

Must $e in good s)a(e wit)out s(licesMust $e in good s)a(e wit)out s(lices

Cannot $e secured wit) sta(les* nails orCannot $e secured wit) sta(les* nails or

$are wire$are wire

Must $e (rotected from damageMust $e (rotected from damage Must )a&e a ground (inMust )a&e a ground (in

S)ould $e ins(ected regularly and (ulledS)ould $e ins(ected regularly and (ulled

from ser&ice if defecti&efrom ser&ice if defecti&e

Cannot $e re(aired wit) electrical or ductCannot $e re(aired wit) electrical or ductta(e Must re(air wit) )eat-s)rin. slee&e orta(e Must re(air wit) )eat-s)rin. slee&e or

$onding&ulcanizing ta(e to retain original$onding&ulcanizing ta(e to retain original

insulation (ro(ertiesinsulation (ro(erties

Masonry Electrical SafetyMasonry Electrical Safety 4:/



44


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'cce(ta$le Cord Ty(es'cce(ta$le Cord Ty(es

'll cords must meet t)e "ational Electric CodeJs'll cords must meet t)e "ational Electric CodeJs7"EC8 retra Hard ty(e7"EC8 retra Hard ty(e

;oo. for mar.ings stam(ed on cords;oo. for mar.ings stam(ed on cords 'cce(ta$le Cord Ty(es'cce(ta$le Cord Ty(es

' E>tra Hard !se Mar.ings+ S* ST* S#* ST#E>tra Hard !se Mar.ings+ S* ST* S#* ST#

' Hard !sage Mar.ings+ SN* SN#* SNT* SNT#Hard !sage Mar.ings+ SN* SN#* SNT* SNT#

Masonry Electrical SafetyMasonry Electrical Safety/ 44


4@


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Masonry Electrical SafetyMasonry Electrical Safety/ 4@




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E>tension Cords-B)atJs t)e DifferenceLE>tension Cords-B)atJs t)e DifferenceL

"o flat cords allowed on construction sitesI"o flat cords allowed on construction sitesI

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Masonry Electrical SafetyMasonry Electrical Safety 4A


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Cle&er #r Foolis)LCle&er #r Foolis)L

/ Masonry Electrical SafetyMasonry Electrical Safety 4A




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Tem(orary ;ig)tingTem(orary ;ig)ting

'll $ul$s must $e'll $ul$s must $eguardedguarded

"o $ro.en $ul$s"o $ro.en $ul$sor em(ty soc.etsor em(ty soc.ets "ot sus(ended"ot sus(ended

$y wiring$y wiring ;ow &oltage for;ow &oltage for

wet locationswet locations



/S!,P'0T

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Porta$le GeneratorsPorta$le Generators

T)e frame of t)eT)e frame of t)e(orta$le generator need(orta$le generator neednot $e grounded if+not $e grounded if+

' t)e generator su((liest)e generator su((lies

only cord and (lugonly cord and (lugconnected e


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Safe Bor. PracticesSafe Bor. Practices

,efore wor. $egins* t)e em(loyer,efore wor. $egins* t)e em(loyermust determine w)ere e>(osed andmust determine w)ere e>(osed andconcealed electrical circuits areconcealed electrical circuits are

locatedlocated

#nce found* warning signsla$els#nce found* warning signsla$elsmust $e (ostedmust $e (osted

Bor.ers need to .now t)e location*Bor.ers need to .now t)e location*

)azards* and (rotecti&e measures)azards* and (rotecti&e measures

Masonry Electrical SafetyMasonry Electrical Safety @5/

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Safe Bor. PracticesSafe Bor. Practices Com(etent Person determines ifCom(etent Person determines if

(erformance of wor. could $ring(erformance of wor. could $ringcontact wit) energycontact wit) energy

' Distance of t)e wor.er to t)e energyDistance of t)e wor.er to t)e energysource s)ould $e considered firstsource s)ould $e considered first

' Tools* materials* and (rocesses s)ouldTools* materials* and (rocesses s)ouldalso $e considered to see if t)ey couldalso $e considered to see if t)ey could(otentially s)orten t)e safe se(aration(otentially s)orten t)e safe se(aration

distancedistance( E>am(les+ Metal ;adders* 0e-$ar* For.lift*E>am(les+ Metal ;adders* 0e-$ar* For.lift*

Scaffold Frames* etcScaffold Frames* etc

Masonry Electrical SafetyMasonry Electrical Safety/

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Safe Bor. PracticesSafe Bor. Practices Must not (ermit wor. near electricMust not (ermit wor. near electric

circuits unless t)e wor.er iscircuits unless t)e wor.er is

(rotected $y+(rotected $y+

' De-energizing t)e circuit and groundingDe-energizing t)e circuit and grounding

itit

' Guarding it effecti&ely $y insulationGuarding it effecti&ely $y insulation

' #t)er means 7maintaining safe#t)er means 7maintaining safe

se(aration8se(aration8 De-energized circuits and e


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Safe Bor. PracticesSafe Bor. Practices

"o metal ladders for or near"o metal ladders for or nearelectrical wor.electrical wor.

"o wet )ands w)en (lugging or"o wet )ands w)en (lugging or

un(lugging cordse


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Electrical SafetyElectrical Safety

Masonry Electrical Safetyaso y ect ca Sa ety/

Common #SH' Citations+Common #SH' Citations+' ))4547$87187i8+ ,ranc) circuits+ GFC=4547$87187i8+ ,ranc) circuits+ GFC=

(rotection'ssured E


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Summary ? Hazards ProtectionsSummary ? Hazards Protections

Masonry Electrical Safetyy y/

HazardsHazards =nade(osed electrical (arts Bires wit) $ad insulationBires wit) $ad insulation !ngrounded electrical systems!ngrounded electrical systems

and toolsand tools #&erloaded circuits#&erloaded circuits Damaged (ower tools andDamaged (ower tools and

etension cords !ni$le cords

Close electrical (anels $yClose electrical (anels $yCom(etent PersonCom(etent Person

Em(loyee trainingEm(loyee training

Ensure Com(etent Person onEnsure Com(etent Person onsitesite

!se (ro(er a((ro&ed electrical!se (ro(er a((ro&ed electricale


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0E=EB !EST=#"S0E=EB !EST=#"S

True or FalseLTrue or FalseL11 S)oc.s and Electrocutions are t)e mostS)oc.s and Electrocutions are t)e most

common ty(e of electrical accident and arecommon ty(e of electrical accident and aret)e fourt) leading cause of wor.er deat)st)e fourt) leading cause of wor.er deat)s

T)e )uman $ody will not conductT)e )uman $ody will not conductelectricityelectricity

:: =t ta.es at least 1 am( going t)roug) a=t ta.es at least 1 am( going t)roug) a

wor.er to .ill t)emwor.er to .ill t)em44 =nsulation on e>tension cords ele&ating=nsulation on e>tension cords ele&ating

(ower lines are e>am(les of (rotection(ower lines are e>am(les of (rotectiont)roug) isolationt)roug) isolation

y S yy y/

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True or FalseLTrue or FalseL@@ 'll (orta$le and semi-(orta$le tools and'll (orta$le and semi-(orta$le tools and

e


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True or FalseLTrue or FalseL

22 Circuit $rea.ers and fuses are designed toCircuit $rea.ers and fuses are designed to(rotect t)e wor.er from electrocution(rotect t)e wor.er from electrocution

1515GFC= (rotection or 'ssured GroundGFC= (rotection or 'ssured GroundContinuity is re

focus four module1

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