Electrical Safety Seminar

7/26/2019 Electrical Safety Seminar

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BasicElectrical Safety


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Did You Know That?

Thousands of people are either killed orinjured each year due to electrocutions.

Electricity is the NUBE! " source of#re.


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$%jecti&es

To learn so'e %asic knowled(e inelectricity.

To know the dan(ers of electricity. To learn the safe practices in the use of

electricity.


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De#nition

)olta(e * an electro'oti&e force orpotential di+erence e,pressed in &olts

-) /urrent 0 electrical 'o&e'ent1

'easured in a'peres -2

!esistance * restriction to electricalflow1 'easured in oh's -3


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$h'4s 5aw

6 7 )8!67current

)7&olta(e

!7resistance


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De#nition

/onductors 0 su%stances1 like 'etals1that allow electricity to 9ow

6nsulators * su%stances with hi(hresistance to electricity like (lass1porcelain1 plastic1 and dry wood thatpre&ent electricity fro' (ettin( tounwanted areas


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De#nition

:roundin( 0 a conducti&e connection tothe earth which acts as a protecti&e

'easure /ircuit * co'plete path of the current.

6ncludes electricity source1 a conductor1and the output de&ice or load -such asa la'p1 tool1 or heater


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;alash * can cause %urns ran(in(fro' "1@@@ to A1@@@ de(ree

>ahrenheit


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;ow S;$/KS $ccur?

/urrent tra&els in closed circuits throu(hconductors -water1 'etal1 the hu'an%ody.

Shock occurs when the %ody %eco'es apart of the circuit.

/urrent enters at one point C lea&es at

another.


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S;$/KS $ccur in Two ays

/ontact with %oth conductors.

/ontact with one conductor and

(round.


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>low of /urrent throu(h theBody Depends Upon

)$5T2:E $> T;E /6!/U6T

6NSU52T6N: U256TY $> T;E F52/E

2!E2 $> /$NT2/T F!ESSU!E $> /$NT2/T

!ES6ST2N/E $> T;E SK6N


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!esistance of the ;u'anBody

The inner resistance of a hu'an %odyis a%out @@1@@@ oh's. hen wet1

down to A@@ oh's.But the skin resistance (reatly dependson the content of 'oisture.

hen sweaty1 the skin resistance candecrease down to "8"G.

xamp e cenar o o ow o urrent


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xamp e cenar o o ow o urrentin Human Body in HouseholdElectricity220V-220V

! V " #

! 220 $olts " %000 ohms

! &220 ampere

or 220 milliampere 'm&a&(

6f a hu'an %ody with "1@@@*oh' resistance ise,posed to household electricity at GG@ &olts1 acurrent of GG@ '.a. will 9ow throu(h the %ody.


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E)ects of Electric Currenton Human Body

H *"'.a. *pain

" *G@'.a. *pain1 loss of 'uscular control

G@ *"@@'.a. *intense pain and paralysis of %reathin('usclesI

*possi%le su+ocation

"@@ *G@@'.a. *)entricular #%rillation which will causedeath.

$&er G@@ '.a. fro' GG@) household &olta(e *health 'o&e'ent stopsI reco&erypossi%le if treated within A 'inutesI %urns also occur.


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Se&erity of Electric Shock

U2NT6TY $> /U!!ENT

F2T; 8 F2SS2:E $> T;E /U!!ENT5EN:T; $> T6E

TYFE $> E5E/T!6/ ENE!:Y

;U2N 8 F;YS6/25 /$ND6T6$N


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Froper Steps on !espondin(to an Electrical 2ccident

Step %* +,# .FF the /ower&

J >ind the E'er(ency achine $+

-E$ %utton and turn o+ the power.J Know in ad&ance where these%uttons are located.


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Step 2* Safely Free the Victim

J 6f you cannot #nd the E$ switch1

atte'pt to safely free the &icti'.J Ne&er atte'pt to pull the &icti'away %y handI you could also lock ontothe source.

J Use the proper e=uip'ent such as a%ody hook or a non*conducti&e o%jectto pry or knock the &icti' free.


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Step * Call for Help

J Fick up the phone and call for help.

J Be sure you know -ahead of ti'e thee'er(ency nu'%er at your site.


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Step 1* o ot 3ea$e the Victim

JStay with the &icti' until help arri&es.

J6nfor' people in the area in order toa&oid further injuries.


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Emer4ency #esponse Steps #e$iew

Step %* +urn o) the /ower

Step 2* Safely Free the Victim

Step * Call for Help Step 1* o not 3ea$e the Victim


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Basic Electrical Safety Tips

!eplace or repair da'a(ed or looseelectrical cords.

2&oid runnin( e,tension cords acrossdoorways or under carpets.

6n ho'es with s'all children1 'akesure your ho'e has ta'per*resistant-T! receptacles.


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/onsider ha&in( additional circuits oroutlets added %y a =uali#ed electrician

so you do not ha&e to use e,tensioncords.

>ollow the 'anufacturers instructionsfor plu((in( an appliance into a

receptacle outlet.


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2&oid o&erloadin( outlets. Flu( onlyone hi(h*watta(e appliance into each

receptacle outlet at a ti'e. 6f outlets or switches feel war'1

fre=uent pro%le's with %lowin( fusesor trippin( circuits1 or 9ickerin( or

di''in( li(hts1 call a =uali#edelectrician.


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Flace la'ps on le&el surfaces1 awayfro' thin(s that can %urn and use

%ul%s that 'atch the la'psreco''ended watta(e.

ake sure your ho'e has (round faultcircuit interrupters -:>/6s in the

kitchen %athroo'-s1 laundry1%ase'ent1 and outdoor areas.


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T;EN:YUL

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Electrical Safety Seminar