1. Electrical Safety, Subpart K

2. Review of Electrical Safety
Current - Current is the movement or flow of electricity.
Volts - Volts are the force moving the electricity through a conductor.
Amps - Amps are the measure of rate or speed of electricity flowing through a conductor.
Circuit - Circuit makes the flow of electricity possible. A complete circuit is necessary for electricity to flow both in and out.

3. Review of Electrical Safety
Devices used to reduce your risk of electrical contact and help you to Start Safe include: Insulation, Grounding Plugs, Grounding-Fault Circuit Interrupters (GFCIs), Fuses, and Circuit Breakers.

4. Review of Electrical Safety
To Stay Safe, follow these Electrical Safety Procedures:
If you are not properly trained or don’t feel comfortable doing a job, don’t do it.
Don’t use electrical equipment if you or your surroundings are wet.
Don’t overload circuits or outlets.
Never use a three-prong grounded plug if the third prong is broken off.
Inspect electrical equipment and power cords before using them. If they are damaged, don’t use them at all.

5. Common Electrical Injuries
Injuries fall into two main categories: direct and indirect.
Direct injuries include:
Electrocution
Electrical shock
Burns
Indirect injuries include:
Falls

6. Common Electrical Injuries
The type of burns sustained depend on the manner in which the skin comes into contact with the electrical current. There are three types of burns that can result:
Electrical burns
Arc or Flash burns
All of these burns require immediate medical attention and should be taken seriously.

7. Common Electrical Injuries
Factors that affect the severity of an electrical injury:
The path of the current
The amount of current
How long the current runs through the body
The voltage of the current
The presence of moisture
A person’s health before the shock

8. Common Electrical Injuries
The resistance of the body to the electrical current depends on multiple factors including: the amount of moisture on your skin, the size of the area in contact with the current, the pressure you apply to the contact point, and your muscle structure.
Injuries are more severe if you have a larger area of the body, moister skin, more pressure, and more muscle mass receiving the electrical current.

9. Electrical Hazard Warning Signs
Electrical hazards exist all around the worksite. A few warning signs to look for are:
A GFCI that shuts off a circuit
Blown fuses or tripped circuit breakers
Warm tools, wires, cords, or connection boxes
Worn or frayed insulation around a wire or connector
Water or dampness near electrical wires, outlets, circuits, or power tools

10. Lockout/Tagout
Designed to protect you from injuries caused by unexpected energizing or startup of machines or equipment or release of stored energy.
The procedure involves either placing a lock on the energy isolating device to hold it in the safe position and prevent a machine or equipment from being energized, or attaching a tag securely to equipment or machinery for the purpose of warning personnel not to operate the device.

11. Construction Site Hazards
Hazards at a construction site are the result of:
Unsafe equipment and/or installation
Unsafe work practices
Unsafe working environments
When one or more of these hazardous conditions exist, the following electrical safety issues can occur:
Exposed electrical parts
Overhead power lines
Inadequate wiring
Defective insulation
Improper grounding
Overloaded circuits
Wet conditions
Damaged tools and equipment
Improper Personal Protective Equipment (PPE)

12. Electrical Site Hazards
To protect against electrical hazards, you should:
Wear personal protective equipment (PPE) at all times
Make sure to use proper wiring and connections
Use and test GFCI’s
Check switches and insulation
Use three prong plugs
Use extension cords only when necessary and only if they are in good condition
Use correct connectors
Train employees to practice safe working conditions when working with electrical equipment

13. Electrical Site Hazards
Employee training should include:
De-energizing electrical equipment before inspecting or repairing
Using cords, cables, and electrical tools that are in good repair
Lockout or Tagout recognition and procedures
Use the appropriate protective equipment