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Electronics

Safety, Its for All of Us

Copyright Texas Education Agency, 2013. All rights reserved.

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Safety Slide Overview

Terms and denitionsTypes of electrical injuries Facts about electrical shock

Treating a ictim of electrical shockTypes of resTypes of re e!tinguishers and their uses "a#ard labels

$eneral lab safety rules %ersonal safety rules "and tool safety precautions %o&er tool safety precautions


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Terms and Denitions

Safety' the state of being free from danger,personal risk,or injury

Accident' any unplanned eent, occurringsuddenly, &hich causes personal injury or damage toproperty

First aid-immediate care gien to an accident orshock ictim until medical help arries

Electrical shock-the jolt a person e!periences&hen electrical current passes through a part of thebody (ote' )lectrical shock can cause serious burns and muscle damage, and can

kill a ictim by stopping the heart or breathing or both*

Electrical conductive materials-materialsthrou h &hich electricit +o&s easil


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Terms and Denitions(continued)

Electrical insulatin materials' materialsthrough &hich electrical current cannot +o&easily )!amples' rubber, cotton, &ood, ber glass, plastic

Electrical circuits' the system of &ires andcables that carry electricity to motors, appliances,heating elements and other deices &hichoperate by means of electricity

Overloaded circuit' an electrical circuit that isdra&ing more electrical current than it is designto handle

Electrical outlet ada!ter' an electrical plugthat is installed into an electrical outlet to permit

t&o or more electrical connections to the outletCopyright Texas Education Agency, 2013. All rights reserved.

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Terms and Denitions(continued)

Fuse' a deice that opensthe circuit -/burns out0.&hen the circuit isoerloaded

"ircuit#reaker' a deicethat automatically opensthe circuit like a s&itch iftoo much current is being

dra&n Smokealarm' a deice

that senses smoke andgies o1 a shrill sound toalert people in the areathat a re may be starting


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Four $ain Ty!es ofElectrical %n&uriesElectrocution (death due to

electrical shock)

Electrical shock'urnsFalls

- Electricity is one of the most commoncauses of res and thermal #urns inhomes and work!laces


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"ommon Sense

2ou &ill receie an electrical shock if apart of

your body completes an electricalcircuit by3 touching a lie &ire and an electrical

ground, or

touching a lie &ire and another &ire at adi1erent oltage*


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Electrical and ElectronicE,ui!ment

Electricalshock(ote' )lectrical shock can occur if thebody contacts an electrical circuit or isstruck by lightning*

Electrical#urns(ote' )lectrical burns can occur if thebody contacts an electrical circuit or isstruck by lightning or if the body ise!posed to radio'fre4uency &aes, 5'rays, or other forms of radiation*


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Hazards of Working with Electrical &

Electronic Equipment (continued)

Electricalres(ote' )lectrical res can occur ifelectrical &ires become heatedbecause of an oerloaded circuit

and contact +ammable materials*

%n&ury from misuseof tools(ote' 6ody injuries can be causedby improper use of tools*


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Facts a#out ElectricalShock

urrent is &hatcauses musclecontraction, burns,

and pain* urrent is caused by

oltage*

"igher oltage is

more dangerous thanlo& oltage, butcurrent kills*

A causes the heart

to brillate at lo&erolta e than 7*


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The danger from electrical shock dependson3

the amount of the shocking currentthrough the body,

the duration of the shocking currentthrough the body, and

thepath of the shocking current throughthe body*

11Copyright Texas Education Agency, 2013. All rights reserved.

Facts a#out ElectricalShock (continued)

i i i f

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Treatin a ictim ofElectrical Shock

. Shut o/ the electrical current if theictim is still in contact &ith theenergi#ed circuit*

8* 9hile you do this, hae someone elsecallfor help*

:* If you cannot get to the s&itchgear

4uickly, pry the ictim from the circuit&ith something that does not conductelectricity such as dry &ood*

4. Do not touch the victim yourselfif he or she is still in contact with


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Electrical Shock(continued)

;

8* heck ictimsbreathing andheartbeat*

:* Administer rst aid

for shock and burnsas necessary*

?* 7o not leae theictim unless there is

absolutely no otherCopyright Texas Education Agency, 2013. All rights reserved.

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Ty!es of Fires

Fire e!tinguishers areclassied to indicate their

ability to handle specicclasses and si#es of res*

=abels on e!tinguishersindicate the class andrelatie si#e of re thatthey can be e!pected tohandle*


T f Fi

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Ty!es of FireE0tinuishers 1 2ses


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Ty!es of Fires(continued)

Solid, organic material

@ost common type ofre

)asiest to ght 6y remoing heat,

o!ygen, or fuel ombustible li4uid or

gas

9ater should neer beused It can spread the re

Smother &ith 8or

foamCopyright Texas Education Agency, 2013. All rights reserved.

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Ty!es of Fires(continued)

Inole potentiallyenergi#ed electricale4uipment

an be a serious ha#ardto reghters 9ater conducts electricity

@agnesium and titaniumres are common

Some metals burn &hencontacted &ith air or &ater )!ample3 sodium


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3-A-S-S

The steps for using a ree!tinguisher are to33ull the pinBAim the no##leBS4uee#e the triggerB and

S&eep e!tinguisher back and forthoer the re* "o&eer, do not try to put out res unless

you hae receied proper training* If you are

not trained, the best thing you can do is18Copyright Texas Education Agency, 2013. All rights reserved.

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a*ard

4a#els

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a*ard 4a#els


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a*ard 4a#els


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a*ard 4a#els


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UNT in partnership with TEA. Copyright . A!! rights

reser"e#.


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5eneral 4a# Safety 6ules

Ceep all hand tools clean and in safe,&orking order*

>eport any defectie tools, test

e4uipment, or other e4uipment to theteacher*

7o not remoe any deices, Di*e* groundstraps, s&itch coers, etc*E &ithout the

permission of the teacher* 7o not operate or energi#e any circuit that

could be ha#ardous &ithout rst receiinginstruction on ho& to do so safely*


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5eneral 4a# Safety 6ules(continued)

>eport all accidents to the teacherregardless of nature or seerity*

Turn o1 po&er before leaing test

e4uipment or circuits being &orked on* 7o not use any solent &ithout rst

determining its properties and ho& to useit safely*

Ceep the laboratory +oor clean of scrapsand litter*

lean up any spilled li4uids immediately* Store all cleaning rags in metal cans or

containers*Copyright Texas Education Agency, 2013. All rights reserved.

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3ersonal Safety 6ules

9hen &orking on or near rotatingmachinery, secure loose clothing and tiehair -if long.*

Isolate line -po&er. oltages from groundby means of isolation transformers*

heck all line -po&er. cords before usingfor brittle or cracked insulation* Do notuse if damaged and report to the teacher*

9hen measuring oltages &ith a meterand test probes, be careful not to connect

yourself to a oltage of any alue*Copyright Texas Education Agency, 2013. All rights reserved.

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3ersonal Safety 6ules(continued)

6e certain that +oor is isolated either bytile, rubber mat, or by &earing rubber soleshoes*

9hen measuring oltages e!pected to begreater than : olts, turn o1 ordisconnect the lie circuit beforeconnecting test e4uipment*

It is recommended that only e4uipment&ith a polari#ed -three prong. plug beused*


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7o not defeat the purpose of any safetydeice such as fuse, circuit breakers, orinterlocks* Shorting across these deices

could cause e!cessie current +o& &hichmight destroy or seriously damagee4uipment being &orked on, as &ell ascause a re*

7o not carry sharp'edged or pointed toolsinyour pockets*


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7o not indulge in horseplay or playpractical jokes in any lab*

9ear gloes and goggles &hen re4uired*

7o not &ear rings or je&elry &hen &orking&ith mechanical or electrical deices*

)!ercise good judgment and common

sense*


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and Tool Safety3recautions

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and Tool Safety3recautions (continued)

?* )!ercise care in using long nose pliersand diagonal cuttersB they can pinch and

cut*G* 7o not use long nose pliers as a &rench*

H* )ase up on the pressure just before ahacksa& completes its cut*

* 6e sure hammer heads and scre&drierblades are fastened tightly in theirhandles*

J* Use safety glasses or goggles &henCopyright Texas Education Agency, 2013. All rights reserved.

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3ower Tool Safety3recautions

7ote-%o&er tools usually operate on

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3ower Tool Safety

3recautions (continued)

9hen drilling, use asharp drill bitBpressure on a dulldrill bit can causean accident*

Securely fasten the &ork

being drilled*7ote-The drill can turnboth the bit and the&ork, &hich can causean injury*


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3ower Tool Safety3recautions (continued)

Ceep po&er tool guards inplaceB they are for your

protection* perate po&er tools only

after you hae hadinstruction intheir uses*


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3ower Tool Safety3recautions (continued)

9ear safety gogglesor glasses &henoperating po&er

tools*7ote-Flying chipscan causepermanent damage

to your eyes* %o&er cords and

s&itches should bechecked beforeusin a o&er tool*


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3resentation Summary

Terms and denitions Types of electrical injuries Facts about electrical shock Treating a ictim of electrical shock Types of res Types of re e!tinguishers and their uses "a#ard labels $eneral lab safety rules %ersonal safety rules "and tool safety precautions %o&er tool safety precautions

4%E SAFE 8 'E SAFECopyright Texas Education Agency, 2013. All rights reserved.

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01.01-safety