2. Welcome toWelcome to TSMLTSML
Presented By:Presented By: S.W FakhriS.W Fakhri

3. Controlling Electrical HazardsControlling Electrical Hazards
Out LineOut Line
INTRODUCTIONINTRODUCTION
 Electric ShockElectric Shock
 Static electricity hazardsStatic electricity hazards
 Protection against Electrical hazardsProtection against Electrical hazards
 Common Dos and Don’tsCommon Dos and Don’ts

4. Electrical Hazard Result:Electrical Hazard Result:
• ShockShock
• ElectrocutionElectrocution
• BurnsBurns
• ExplosionExplosion
• InjuryInjury
• DeathDeath

5. Electrical ShockElectrical Shock
• What Causes shocks:What Causes shocks:
 A person body complete the current pathA person body complete the current path
through both wiring and electric circuitthrough both wiring and electric circuit
 One wire of an energized circuit and groundOne wire of an energized circuit and ground
 A metal part that accidentally becomesA metal part that accidentally becomes
energizedenergized
 Another conductor that is carrying a current.Another conductor that is carrying a current.

6. What effect of shock on bodyWhat effect of shock on body
SHOCK Depends on voltage, current and time duration.SHOCK Depends on voltage, current and time duration.
Electrical Shock Human body effectsElectrical Shock Human body effects
Electric currentElectric current REACTIONREACTION
Below 1mABelow 1mA Generally not perceptible.Generally not perceptible.
9 ~ 30mA9 ~ 30mA Can be through away fromCan be through away from
the circuit. Muscles are stimulatedthe circuit. Muscles are stimulated
50 ~ 150mA50 ~ 150mA extreme pain, respiratory arrest severextreme pain, respiratory arrest sever
1 ~ 4.3A1 ~ 4.3A Stop pumping action of the heartStop pumping action of the heart
ceases muscular contraction and nerveceases muscular contraction and nerve
damage, occursdamage, occurs DEATHDEATH likelylikely

7. Static Electricity HazardsStatic Electricity Hazards
Static electricity consist of electric chargeStatic electricity consist of electric charge
that stay in one placethat stay in one place
Discharge causes a shock or even fire.Discharge causes a shock or even fire.
Example: Reach a door knob, static chargeExample: Reach a door knob, static charge
on rubber mate, capacitors, de-energizedon rubber mate, capacitors, de-energized
cables.cables.

8. Protection against electricalProtection against electrical
hazardhazard
Electric hazard common causes:Electric hazard common causes:
Unsafe equipment, or installationUnsafe equipment, or installation
Unsafe environmentUnsafe environment
Unsafe practicesUnsafe practices

9. • Insulation:Insulation:
An insulation is any material with high resistanceAn insulation is any material with high resistance
to pass the electric current.to pass the electric current.
Example: Rubber, Plastic, Glass, Backlit, FiberExample: Rubber, Plastic, Glass, Backlit, Fiber
Porcelain, dry wood, etcPorcelain, dry wood, etc
Ensure compliance with insulation type (correctEnsure compliance with insulation type (correct
rated voltage and current, size of the conductorrated voltage and current, size of the conductor
for the required load)for the required load)
• Guarding:Guarding:
Enclosures for electrical equipmentsEnclosures for electrical equipments
Guarding for exposed electrical equipments.Guarding for exposed electrical equipments.
Posting proper protection signs & barriers.Posting proper protection signs & barriers.

10. • GroundingGrounding::
Creating a low resistive path that connects to theCreating a low resistive path that connects to the
earthearth
Preventing buildup of the voltage.Preventing buildup of the voltage.
Consider a secondary protective measureConsider a secondary protective measure
Note: All equipments are efficiently earthed andNote: All equipments are efficiently earthed and
properly connected to the required numbers ofproperly connected to the required numbers of
electrodes etcelectrodes etc

11. • Circuit protection devicesCircuit protection devices::
Limiting or stopping the flow of currentLimiting or stopping the flow of current
automatically by tripping the breaker, fuseautomatically by tripping the breaker, fuse
blown or GFCI trippedblown or GFCI tripped
Activation due to grounding fault, overActivation due to grounding fault, over
load or shot circuit in the power systemload or shot circuit in the power system
Example: fuses, circuit breakers, groundExample: fuses, circuit breakers, ground
and arc fault circuit interrupters.and arc fault circuit interrupters.

12. • Safe Work PracticeSafe Work Practice::
De-energized electrical equipment beforeDe-energized electrical equipment before
inspection or repair.inspection or repair.
Maintaining the electrical tools properlyMaintaining the electrical tools properly
Practice caution sign and barriers whilePractice caution sign and barriers while
working.working.
Utilize appropriate protective equipments.Utilize appropriate protective equipments.

13. • Dos & Don’tsDos & Don’ts ::
Do – Always follow safety instruction because your lifeDo – Always follow safety instruction because your life
depends on them.depends on them.
Do – Plug power equipment into wall receptacle with powerDo – Plug power equipment into wall receptacle with power
switch in off position.switch in off position.
Do – Comply with safety standards for isolation, lockoutDo – Comply with safety standards for isolation, lockout
and tag procedure in addition to the local instructionand tag procedure in addition to the local instruction
manualsmanuals
Do not – Energize any electrical equipment or tool beforeDo not – Energize any electrical equipment or tool before
double inspection or if required complete a checkdouble inspection or if required complete a check
out list.out list.
Do not – Drape power cord over hot pipes, or sharp objectsDo not – Drape power cord over hot pipes, or sharp objects
Do not – Work an electric equipment that not sure aboutDo not – Work an electric equipment that not sure about
its de-energization status.its de-energization status.
Do not – Plug equipment into defective receptaclesDo not – Plug equipment into defective receptacles

16. High Voltage Shock & Arc
Cable blown away
when wire cutters make
contact with conductor

17. High Voltage Shock
Effects
• Insulated cutters, but
inappropriate tool to use
for high voltage.
• Only High Voltage
Hotsticks, with Voltage-
rated Gloves can be used
for this work.
• Qualified Electrical
Workers only.
• Result:
Electrocution.

18. High Voltage Shock
Physical Effects of Electrocution

19. High Voltage Shock
Entry point of High Voltage

20. High Voltage Shock
Effects ~ Arcing to Grounded Conduits (2)

21. High Voltage Shock
Arcing Effects ~ Body to Grounded Conduits (2)

22. High Voltage Shock
Arcing Effects ~ Body to Grounded Conduit

23. High Voltage Shock
Blowout Effects
• Exit points (4)
• Thru the right
thumb, left elbow,
abdomen, and
pelvic area; where
High Voltage Arc
blows out…
completing the
circuit to ground.

24. High Voltage Shock
Entry and Exit Wounds

25. THANK YOUTHANK YOU