OSHA: Avoiding Electrocution Hazards

Under which of the following circumstances would a person be shocked?

Becomes part of an electrical circuit.

BE SAFE

Burns Electrocution Shock Arc flash Fire Explosions

A worker standing on a freshly mopped floor is adjusting products on a metal shelf with which there is a bare wire in contact.

Contacting Energized Sources; bare wire is in contact with the metal frame - also a conductor - and the worker is touching it whilst standing on a wet surface.

A worker carrying a long, metal pole accidentally makes contact with a power transmission line above his walking route.

Contacting Overhead Power Lines; Through the pole he is carrying, the worker comes into contact with an overhead power line.

An electric shock can result in anything from a slight tingling sensation to immediate cardiac arrest. The severity depends on the: Amount of current flowing through the body. Current's path through the body. Length of time the body remains in the circuit. Current's frequency.

- Amount of current flowing through the body. - Current's path through the body. - Length of time the body remains in the circuit. - Current's frequency.

Which of these does OSHA require employers to construct and install to minimize electrocution hazards?

- Lighting found throughout the building - Appliances (ex. freezers/refrigerators) - Switches used with generators - Controls on equipment & machinery in workplace

In a case where electrical current leakage from the circuit occurs, the GFCI would do the following:

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

This type of burn occurs when electrical current flows through tissues or bone, generating heat, and causing damage.

Electrical Burn

This is an essential safety procedure that protects workers from injury while working on or near electrical circuits and equipment by locking the device and/or power source to prevent anyone from turning on the hazardous power sources while someone is performing maintenance or servicing work: Select the best option.

Lockout/Tagout

A conductor allows electrical current to move through it easily. Which of the following answer options are conductors?

Metal, wet skin, water w/small amounts of salt or other minerals

An insulator provides resistance to the movement of electrical current. Which of the following answer options are insulators?

Pure water, plastic, dry skin

In almost all cases, touching power lines or coming into contact with energized sources will result in what?

Severe injuries or death

Which factor increases the risk of injury if a person is shocked?

Sweat

This type of burn occurs when the skin touches hot surfaces of overheated electric conductors, conduits, or other energized equipment. It can also occur when clothing catches on fire. Select the best option.

Thermal Contact Burn

Electrical circuits must be locked-out/tagged-out before electricians work on any equipment. Is this true or false?

True

A client is undergoing therapy in a whirlpool unit that has been plugged into an extension cord. What is this an example of?

Using Extension or Flexible Cords Improperly

A client is undergoing therapy in a whirlpool unit that has been plugged into an extension cord.

Using Extension/ Flexible Cords Improperly; The whirlpool therapy unit should be plugged directly into a receptacle with a GFCI.

How does a GFCI protect you?

detecting when there is any current leakage and cuts off the electrical flow.

What properties does a conductor have?

allows electrical current flow.

example of fixed wiring

electrical wires inside the walls of buildings

examples of flexible wiring

extension cords, appliance cords, or by plugs, receptacles, and switches.

About 3 o'clock this morning, firefighters responded to a building fire. While the fire was limited to one room and there were no injuries, there was about $5,000 worth of damage to structures. It was determined that electrical wiring from the mini-refrigerator to the wall receptacle was the cause of the fire. The mini-refrigerator fire was most likely caused by what type of wiring?

flexible wiring; b/c refrigerator cord was responsible for the fire.

Employers should attach tags to identify equipment or circuits being worked on while any worker is exposed to contact with ____________ parts.

live

OSHA's standards require your employer to ensure that lighting, equipment, motors, machines, appliances, switches, controls and enclosures are constructed and installed to _____________ electrical dangers.

minimize

Is placing a plug into a wall receptacle with your hand on the plug safe or unsafe?

safe

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

unsafe

Is using a three-prong plug with a missing ground post safe or unsafe?

unsafe