OSHA-10: Avoiding Electrocution Hazards

what is required of a lockout/tagout?

Requires workers to place a tag on the locked device indicating that it should not be turned on.

Can a person become part of a circuit?

Yes

How does a GFCI protect you? a.It detects when there is any current leakage and cuts off the electrical flow. b.It alerts you when there is any current leakage. c.It can cut off the electrical flow when you push the reset button.

A

Which of these does OSHA require employers to construct and install to minimize electrocution hazards? Select all that apply. a.Lighting found throughout the building b.Appliances such as freezers or refrigerators c.Switches used with generators d.Controls on equipment and machinery in the workplace.

A, B, C, D

What three things must be present for a current to flow through a conductor

1.A source of electrical current to flow 2.Something to transport the electrical current -- A conductor 3.Something that causes current to flow through the conductor

Which of the following are electrical hazards? Select all that apply. a.Shock b.Explosions c.Burns d.Fire e.Arc Flash f.Electrocution

1.A, B, C, D, E, F

In a case where electrical current leakage from the circuit occurs, what are the three things the GFCI would do:

1.Sense the current leakage 2.Trip the circuit 3.Cut off the electricity

In 2017, there were over ______________ electrical related violations cited by OSHA in the workplace.

4,600

Arc or Flash Burns

Arc or flash burns result from high temperatures caused by an electric arc or explosion near the body. An example of an arc flash is a lightning bolt. The electrical current travels through air. This type of arc flash generates enough heat to melt metal. The same process can happen with any electrical device.

A worker standing on a freshly mopped floor is adjusting products on a metal shelf with which there is a bare wire in contact. Which hazard is present? a.Contacting overhead power lines b.Contacting energized sources c.Using extension or flexible cords improperly

B

Is it safe or unsafe to pull on a cord to remove plug from a wall receptacle? a.Safe b.Unsafe

B

using a three-prong plug with a missing ground post safe or unsafe? a.Safe b.Unsafe

B

Why may people overlook the hazards of electricity

Because it is such a familiar part of our daily lives.

What is the most common electrical shock related injury?

Burns

Electrical Burns

Electrical burns are among the most serious burns and require immediate medical attention. They occur when electric current flows through tissues or bone, generating heat, and causing damage.

What must be done before an electrician works on any equipment?

Electrical circuits must be locked out/tagged out.

Who is required to ensure that lighting, equipment, motors, machines, appliances, switches, controls and enclosures are constructed and installed to minimize electrical dangers.

Employer

What does lockout/tagout electrical equipment mean?

Locks the device or power source and prevents anyone from turning on the hazardous power sources while someone is performing maintenance or servicing work.

Thermal Contact Burns

Thermal contact burns are caused when the skin touches hot surfaces of overheated electric conductors, conduits, or other energized equipment. Thermal burns also can be caused when clothing catches on fire, as may occur when an electric arc is produced.

People who encounter high voltage power lines can be injured and may die due to____________________

electrocution-If you touch a power line, covered or bare, death is probable.

What electrical equipment must be constructed or installed to minimize workplace electrical danger?

lighting, equipment, motors, machines, appliances, switches, controls, and enclosures

what does the acronym BE SAFE stand for?

•Burns •Electrocution •Shock •Arc flash •Fire •Explosions

What are some protections against electrical hazards?

•Don't overload circuits •Check switches and insulation •Never use a three-prong grounding plug with the third prong broken off •Remove cords from receptacles on the plugs, not the cords •Use extension cords properly

What is a Ground Fault Circuit Interrupter (GFCI) designed to do?

•Protect people from severe and sometimes fatal electrocution by monitoring for electrical leakage to ground •Detect when the current leakage is greater than 5 mA •Interrupt the flow of electric current by tripping quickly enough to prevent electrocution from leakage