Crew Talk Electrical Safety Not Office Worker

7/25/2019 Crew Talk Electrical Safety Not Office Worker

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Electrical SafetyElectrical Safety


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Training

Qualified workers Only Qualified workers are allowed to work on or near exposed energized

equipment.

nqualified workers nqualified workers are not permitted to work on or near exposed energized

equipment


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!oncerned "#out Electricity$

%ow many sets of !&ristmas lig&ts do you plug intoone extension cord$

'o you still use your &ot and sparking electric drill$

(s your )acuum cleaner*s cord twisted and frayed$

%a)e you installed outlet co)ers to protect yourpro#ing fingers$


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Electrical Safety Outline

Electricity and t&e &uman #ody

Electrical &azards and safe work practices

Quiz


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Electrical !ircuits

" #asic completed electrical circuit requires t&reet&ings to function correctly+

Electrical source

Electrical user

,ires


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-ules of Electricity

Electricity tra)els in a completed circuit

Electricity always tra)els in t&e pat& of

least resistance Electricity tries to tra)el to ground


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Electricity and eople

" person usually offers a lessor resistancefor t&e electricity

T&e person forms a completed circuit w&entouc&ing t&e ground

Electricity always tries to tra)el to ground


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/oltages and "mperes

/oltage 0 "mps 1 O&ms2resistance3

!on)erting )oltage to amps

Typical (ndustrial /oltages 4456475 /olts 0 85

milli9amps 2m"3

77567:5 /olts 0 475 m" ::56:;5 /olts 0 7:5 m"


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Effects on t&e %uman mig&t result in a fall

4597? m"+ @oss of muscle control> maynot #e a#le to let go of t&e current

7?9A? m"+ ainful> may lead to collapseor deat&

A?9B55 m"+ @ast for 46: second> almost alwaysimmediately fatal


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-esistance /aries

'ifferent le)els of electrical resistancefor eac& person

-anges from ?55 o&ms to many t&ousands of o&ms

T&e greater t&e #ody*s resistance> t&e less c&anceof &arm

" similar )oltage s&ock can #e minor to one personand deadly to anot&er.


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"dditional -esistance

Clo)es

S&oes

=ats


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%azard !ontrol

Electrical systems are in&erently safe

(nDuries typically occur w&en+

rocedures are inappropriate rocedures are not followed or ignored

Safety systems are circum)ented


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Ceneral Electrical %azards

%ig&9)oltage o)er&eadpower lines

'amaged insulation on wires

'igging or trenc&ing near#uried lines


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orta#le ower Tools

(nspect porta#le power tools

Fe)er use damaged equipment

Tag it out of ser)ice %a)e it repaired or replaced

Fe)er use porta#le power equipment in wet ordamp areas

Stop using power tools if t&ey #ecome &ot orstart sparking


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Extension !ords

(nspect and c&eckfor capacity

or temporary work only

'o not use as a ropeto pull or lift o#Dects

S&ould not #e fastened wit& staples or&ung o)er &ooks


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Electrical !ord (nspection

'eformed or mission pins

'amaged outer Dacket or insulation

E)idence of internal damage

(f damaged> take out of ser)ice until repaired


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!ircuit rotection

Energize or de9energize wit& appropriateswitc&es> #reakers> etc.

'o not energize or de9energize wit& fuses>terminal lugs> or ca#le splice connections

(f circuit protection de)ice is trippedGinspect


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Crounding Equipment

=ost electrical equipment is designed wit& agrounding system

'o not use equipment wit& damaged groundingconnectors

'o not use adapters t&at interrupt t&e grounding

connection


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Cround ault !ircuit (nterrupters

C !(s reduce t&e likeli&ood of fatal s&ocks

'etect small amount of eart& current andautomatically switc& off t&e power

sed wit& extension cords and porta#le tools

uses and circuit #reakers protect equipment>

not people


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Static Electricity

!reated w&en materials ru# toget&er

!an cause s&ocks or e)en minor skin #urns

-educed or pre)ented #y+ roper grounding -u##er matting

Crounding wires> glo)es> or s&oes


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lamma#le6(gnita#le =aterials

lamma#le gases> )apors> or liquids

!om#usti#le dust

!an #e ignited #y static electricity

-equire specially designed electrical equipment


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=ac&ine Operators

Fe)er tamper wit& electrical interlocks

'o not repair electrical components ofyour mac&ine

roperly s&ut off mac&inery #eforeworking in t&e point of operation

O#ey warning signs and follow safe

procedures


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Summary

Electricity will try to reac& ground e)en if itmeans going t&roug& a person

E)en t&e HsmallI )oltage from your &omecan cause serious inDury

"lways inspect power tools and cords anddo not use t&em if damaged

'o not attempt to repair electrical equipmentunless trained and qualified


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Electrical (nDuries

Call for emergency help immediately

E)eryone experiences minor electrical s&ocks from time to time. (n some cases> &owe)er> e)en small amounts ofelectricity can #e life9t&reatening #ecause t&ey can produce unconsciousness> cardiac arrest> and cessation of#reat&ing.

Electrical s&ocks also can produce serious> deep #urns and tissue inDury> alt&oug& often e)en a serious electrical

#urn appears as only a minor mark on t&e skin.

(f you find a person w&om you t&ink &as #een electrocuted> look first--do not touch . %e or s&e may still #e incontact wit& t&e electrical source> and touc&ing &im or &er may only pass t&e current t&roug& you.

(f possi#le> turn off t&e source of electricity. (f t&is is not possi#le> mo)e t&e source away from you and t&e affectedperson using a non9conducting o#Dect made of card#oard> plastic> or wood.

Once t&e person is free of t&e source of electricity> c&eck t&e personJs #reat&ing and pulse. (f eit&er &as stopped orseems dangerously slow or s&allow> initiate resuscitation immediately .

(f t&e person is faint or pale or s&ows ot&er signs of s&ock> lay t&e person down wit& t&e &ead slig&tly lower t&an t&etrunk of &is or &er #ody and t&e legs ele)ated.

Treat any maDor #urns and wait for emergency medical assistance to arri)e.


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Question 4

,&ere does electricity always want to go> e)en if itmeans tra)eling t&roug& a person$


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Question 4

,&ere does electricity always want to go> e)en ifit means tra)eling t&roug& a person$

Electricity always wantsElectricity always wantsto travel toto travel to ground ground ,,

which will complete thewhich will complete thecircuit.circuit.


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Question 7

" s&ock from an outlet at &ome may #epainful> lead to collapse> or e)en deat&. 2True or

alse3


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Question 7

" s&ock from an outlet at &ome may #epainful> lead to collapse> or e)en deat&. 2True or

alse3

True. A 120-volt outlet atTrue. A 120-volt outlet at

home can give thehome can give theaverage person a shock ofaverage person a shock of60 mA.60 mA.


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Question B

,&ic& part of t&e &uman #ody offers t&e mostelectrical resistance$


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Question B

,&ic& part of t&e &uman #ody offers t&e mostelectrical resistance$

TheThe skinskin o ers the mosto ers the mostelectrical resistance.electrical resistance.


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Question :

lamma#le materials can easily #e ignited #y KKKKKKKKKKK electricity.


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Question :

lamma#le materials can easily #e ignited #y KKKKKKKKKKK electricity.

!tatic!tatic electricity canelectricity caneasily ignite aeasily ignite a

"amma#le material."amma#le material.


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Question ?

Only KKKKKKKKKKKKKKKKKKK workers arepermitted to work on or near exposed electricalcomponents.


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Question ?

Only KKKKKKKKKKKKKKKKKKK workers arepermitted to work on or near exposed electricalcomponents.

$nly$nly %uali&e'%uali&e' an' traine'an' traine'workers can repair orworkers can repair or

trou#leshoot electricaltrou#leshoot electricale%uipment.e%uipment.


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Question 8

,&en s&ould power tools and extensioncords #e inspected$


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Question 8

,&en s&ould power tools and extensioncords #e inspected$

(nspect power tools an'(nspect power tools an'e)tension cor's #eforee)tension cor's #eforeeach use.each use.


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Question A

uses and circuit #reaker are designed to protectpeople from s&ocks. 2True or alse3


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Question A

uses and circuit #reaker are designed to protectpeople from s&ocks. 2True or alse3

*alse. *uses an' circuit*alse. *uses an' circuit#reaker protect#reaker protect

machinery an' electricalmachinery an' electricalsystemssystems


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Question ;

,&en a circuit #reaker trips> you s&ouldimmediately reset it. 2True or alse3


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Question ;

,&en a circuit #reaker trips> you s&ouldimmediately reset it. 2True or alse3

*alse. A trippe' #reaker*alse. A trippe' #reakercoul' in'icate acoul' in'icate a

pro#lem, so it shoul'pro#lem, so it shoul'#e checke' #y a#e checke' #y a%uali&e' worker.%uali&e' worker.


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Question L

Extension cords s&ould ne)er #e used as apermanent power source. 2True or alse3


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Question L

Extension cords s&ould ne)er #e used as apermanent power source. 2True or alse3

True. E)tension cor'sTrue. E)tension cor'sare 'esigne' as aare 'esigne' as atemporary powertemporary powersource.source.


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Question 45

,&at s&ould #e done wit& a damaged power tool orextension cord$


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Question 45

,&at s&ould #e done wit& a damaged power toolor extension cord$

Tag it as +out of serviceTag it as +out of servicean' have it replace' oran' have it replace' or

repaire' #y a %uali&e'repaire' #y a %uali&e'electrician.electrician.


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ower @ine Safety

&ttp+66www7.worksafe#c.com6 u#lications6=ultimedia6/ideos.asp$-eport('0B:;4;
http://www2.worksafebc.com/Publications/Multimedia/Videos.asp?ReportID=34818http://www2.worksafebc.com/Publications/Multimedia/Videos.asp?ReportID=34818http://www2.worksafebc.com/Publications/Multimedia/Videos.asp?ReportID=34818http://www2.worksafebc.com/Publications/Multimedia/Videos.asp?ReportID=34818


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The hazards of power lines

Mou cannot tell if a downed power line is energized Dust #y looking at it.

T&e electricity in a power line always seeks a pat& tot&e ground. T&is pat& mig&t include a tree> a )e&icle>or a fence. T&ese o#Dects t&en #ecome energized. (fyou touc& t&e energized line or o#Dect> t&e electricitycan flow t&roug& your #ody. Neep away from anyo#Dect t&at is in contact wit& a power line.

Once electricity reac&es t&e ground> t&e grounditself #ecomes energized. T&is can &appen if a#roken power line falls to t&e ground or onto a)e&icle or tree. T&e electricity t&en flows t&roug& t&eground o)er a wide area> spreading out like ripplesin a pool of water.


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Safe work practices for first responders Treat downed power lines and anything in contact with them as energized.

Park away from the power lines. ,&en you arri)e at t&e scene> park your )e&icle wellaway from any downed lines. s&ine a flas&lig&tt&roug& t&e window to make sure you are not near a downed power line.

Stop traffic and keep people away. edestrians or motorists may not see power linest&at are on t&e ground. T&e surrounding area will #e energized. Secure t&e area andkeep e)eryone #ack at least 45 metres 2BB feet3 9 more if t&e )oltage is o)er 85 kilo)olts.

Don't become a ictim yourself. Mou cannot &elp anyone if you are inDured orelectrocuted. Fe)er touc& anyt&ing t&at is in contact wit& a downed power line> includinginDured or trapped )ictims> puddles> )e&icles> or trees. 'o not use a dry stick or piece of&ose as t&ey will not protect you.

Call the power company immediately. T&e power company can ensure t&at automaticswitc&ing equipment will not restore power to t&e line. " crew wit& proper training andequipment will arri)e as soon as possi#le.

!ait for the power company representati e to confirm that it is safe to approachthe scene. Only t&e power company can confirm t&at t&e system &as #een de9energized and t&at power will not automatically #e restored.


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Staying safe inside a ehicle that is incontact with power lines

(f possi#le> mo)e t&e )e&icle away to #reakcontact wit& t&e power line.

(f t&e )e&icle cannot #e mo)ed> stay inside

until emergency crews can safely approac&.(f anyone approac&es t&e )e&icle> open t&ewindow and call out. Tell t&em to keep awayand to call L9494 for &elp.

(f t&ere is a fire and you must lea)e t&e)e&icle> Dump out wit& your feet toget&er.Fe)er touc& t&e ground and t&e )e&icle att&e same time. =o)e away slowly #ys&uffling and keeping #ot& feet closetoget&er.


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Questions$

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