electrical safety new

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Electrical Safety Electrical Safety

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Electrical Safety Electrical Safety

• The human body generates and requires a The human body generates and requires a certain amount of electricity to function.certain amount of electricity to function.

• The human brain can generate enough The human brain can generate enough electricity to light a 15 watt light bulb.electricity to light a 15 watt light bulb.

• There are approximately 1000 fatalities per There are approximately 1000 fatalities per year in the U.S. from electrical shock.year in the U.S. from electrical shock.

• Injuries and death from electrical shock are Injuries and death from electrical shock are preventable.preventable.

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Electrical SafetyElectrical Safety

Electrical DefinitionsElectrical Definitions• Volts – standard unit of measure of electricity.Volts – standard unit of measure of electricity.• Voltage – force of electrical current measured in Voltage – force of electrical current measured in

volts.volts.• Amps – standard unit of measure for the strength Amps – standard unit of measure for the strength

of electrical current.of electrical current.• Amperage – the strength of electrical current to Amperage – the strength of electrical current to

make a piece of equipment work.make a piece of equipment work.

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Electrical HazardsElectrical Hazards• 1 milliamp- faint tingle (mini xmas lights)1 milliamp- faint tingle (mini xmas lights)• 5 milliamps-Slight shock, disturbing but not 5 milliamps-Slight shock, disturbing but not

painful. Most people can let go. However, painful. Most people can let go. However, strong involuntary movements can cause strong involuntary movements can cause injury. injury.

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• 6-25 milliamps (female)6-25 milliamps (female)• 9-30 milliamps (male) Painful shock, 9-30 milliamps (male) Painful shock,

muscle control is lost. It may not be muscle control is lost. It may not be possible to let go.possible to let go.

• 50-150 milliamps-extremely painful shock, 50-150 milliamps-extremely painful shock, respiratory arrest, severe muscle respiratory arrest, severe muscle contraction. Death is possible.contraction. Death is possible.


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• 1-4.3 amps – ventricular fibrillation, muscles contract, 1-4.3 amps – ventricular fibrillation, muscles contract, nerve damage occurs and death is likely. (hand drill)nerve damage occurs and death is likely. (hand drill)

• 10 amps – cardiac arrest and severe burns occur and death 10 amps – cardiac arrest and severe burns occur and death is probable. (microwave oven)is probable. (microwave oven)

• 15 amps – the lowest over current at which a typical fuse 15 amps – the lowest over current at which a typical fuse or circuit breaker opens a circuit. (window air conditioner)or circuit breaker opens a circuit. (window air conditioner)

• 20 amps – severe external and internal burns and 20 amps – severe external and internal burns and dismemberment (with higher voltages). dismemberment (with higher voltages).

• The above information is for voltage under 600 volts and The above information is for voltage under 600 volts and the severity of shock is affected by muscle mass, body fat, the severity of shock is affected by muscle mass, body fat, path through the body, amount of current and length of path through the body, amount of current and length of time.time.

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• The primary injuries from electricity are burns, pulmonary The primary injuries from electricity are burns, pulmonary failure and/or cardiac arrest.failure and/or cardiac arrest.

• The severity of the injury depends on the voltage, amps The severity of the injury depends on the voltage, amps current (AC or DC) and path through the body.current (AC or DC) and path through the body.

• Dry skin is resistant to electricity and will be the first Dry skin is resistant to electricity and will be the first injury in the form of a burn.injury in the form of a burn.

• If the electricity passes through the skin internal burns to If the electricity passes through the skin internal burns to muscles, organs, etc. can occur.muscles, organs, etc. can occur.

• High voltage and amps can leave entrance and exit wounds High voltage and amps can leave entrance and exit wounds like a bullet and leave a trail of burned tissue internally.like a bullet and leave a trail of burned tissue internally.

• DC is more dangerous then AC.DC is more dangerous then AC.

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Electrical Safety DevicesElectrical Safety Devices

FusesFuses

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Electrical Safety DevicesElectrical Safety Devices

Circuit BreakersCircuit Breakers

Trips at 15 ampsTrips at 15 amps Trips at 5 milliamps Trips at 5 milliamps

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• Fuses and circuit breakers are not designed to Fuses and circuit breakers are not designed to protect you from electrical shock or electrocution. protect you from electrical shock or electrocution.

• Fuses and circuit breakers are designed to protect Fuses and circuit breakers are designed to protect equipment and wiring from catching fire.equipment and wiring from catching fire.

• The only circuit breaker designed to protect people The only circuit breaker designed to protect people is the GFCI breaker, receptacle or extension cord.is the GFCI breaker, receptacle or extension cord.

• Electricity is always looking for ground.Electricity is always looking for ground.• OSHA estimates that they issue approximately OSHA estimates that they issue approximately

20,000 citations per year for improper grounding 20,000 citations per year for improper grounding per NEC, NFPA and OSHA standards.per NEC, NFPA and OSHA standards.

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Electricity Electricity Do’sDo’sDo:Do:• Turn off and secure electrical circuits before Turn off and secure electrical circuits before

working on item.working on item.• Remove jewelry.Remove jewelry.• Wear appropriate PPE.Wear appropriate PPE.• Do not work in wet areas.Do not work in wet areas.• Use GFCI extension cords if working outside or Use GFCI extension cords if working outside or

damp areas.damp areas.

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• Use insulated hand tools.Use insulated hand tools.• If you are not sure of what your doing, call If you are not sure of what your doing, call

an electrician.an electrician.• Open circuit breaker boxes and fuse panels Open circuit breaker boxes and fuse panels

properly.properly.• Low voltage does not mean low hazard.Low voltage does not mean low hazard.

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Electricity Electricity Don’tsDon’ts

DON’T:DON’T:• Overload circuits.Overload circuits.• Cut the ground prong from a three prong Cut the ground prong from a three prong

plug.plug.• Use damaged extension cords.Use damaged extension cords.• Use damaged power tools.Use damaged power tools.

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• Work around water or on a wet surface.Work around water or on a wet surface.• Run extension cords through walls, under Run extension cords through walls, under

carpet or across aisles.carpet or across aisles.• Repair extension or power cords.Repair extension or power cords.• Modify electrical equipment.Modify electrical equipment.• Bypass or modify fuses, breakers, etc.Bypass or modify fuses, breakers, etc.• Use extension cords in place of permanent Use extension cords in place of permanent

wiring.wiring.

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Looking for Little FingersLooking for Little Fingers

kindergarten on a naval basekindergarten on a naval base

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More PowerMore Power

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Removing NightlightRemoving Nightlight

With a butter knifeWith a butter knife

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Temporary LightingTemporary Lighting

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New Type of FuseNew Type of Fuse

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Jewelry Box?Jewelry Box?

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Safety Clyde says Safety Clyde says

When electricity and complacency connect…..When electricity and complacency connect…..

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