0

(

ratings

)

30

students

Created by:

Profile Photo

Last updated:

September 22, 2023

Duration:

4 weeks

This course includes:

4 weeks

Badge on Completion

Certificate of completion

4 weeks

Description

Electrically powered equipment can pose a significant hazard to workers, particularly when mishandled or not maintained. Many electrical devices have high voltage or high power requirements, carrying even more risk.

Electrical Shock Hazards

The major hazards associated with electricity are an electrical shock, fire and arc flash.  Electrical shock occurs when the body becomes part of the electric circuit, either when an individual comes in contact with both wires of an electrical circuit, one wire of an energized circuit and the ground, or a metallic part that has become energized by contact with an electrical conductor. The severity and effects of an electrical shock depend on a number of factors, such as the pathway through the body, the amount of current, the length of time of the exposure, and whether the skin is wet or dry.  Water is a great conductor of electricity, allowing current to flow more easily in wet conditions and through wet skin. The effect of the shock may range from a slight tingle to severe burns to cardiac arrest.  The chart below shows the general relationship between the degree of injury and the amount of current for a 60-cycle hand-to-foot path of one second's duration of the shock.  While reading this chart, keep in mind that most electrical circuits can provide, under normal conditions, up to 20,000 milliamperes of current flow.

Current

Reaction

1 Milliampere

Perception level

5 Milliamperes

Slight shock felt; not painful but disturbing

6-30 Milliamperes

Painful shock; “let-go” range

50-150 Milliamperes

Extreme pain, respiratory arrest, severe muscular contraction

1000-4,300 Milliamperes

Ventricular fibrillation

10,000+ Milliamperes

Cardiac arrest, severe burns, and probable death

In addition to the electrical shock hazards, sparks from electrical equipment can serve as an ignition source for flammable or explosive vapors.

Arc Flash

A hazardous arc flash can occur in any electrical device, regardless of voltage, in which the energy is high enough to sustain an arc. Potential places where this can happen include:
  • Panelboards and switchboards
  • Motor control centers
  • Metal-clad switchgear
  • Transformers
  • Motor starters and drive cabinets
  • Fused disconnects
  • Any place that can have equipment failure
In an arc flash incident, an enormous amount of concentrated radiant energy explodes outward from electrical equipment.  The explosion creates pressure waves that can damage a person’s hearing, a high-intensity flash that can damage their eyesight and a superheated ball of gas that can severely burn a worker’s body and melt metal.

Course Curriculum

    • Electrical Safety 00:25:00
    • Special Training 00:10:00
    • Hazards 00:10:00
    • Safe Work Practices 00:10:00
    • Lock & Tag 00:10:00
    • If a Lock cannot be Applied 00:10:00
    • Release Stored Energy 00:10:00
    • Dead 00:10:00
    • Check your Tester 00:10:00
    • Re-energizing Equipment 00:10:00
    • Energized 00:10:00
    • Working on Energized Circuits 00:10:00
    • Conductive Materials 00:10:00
    • Conductive Apparel 00:10:00
    • Portable Electric Tools 00:10:00
    • Visually Inspect 00:10:00
    • Remove from Service 00:10:00
    • Attachment Plugs 00:10:00
    • Ladders 00:10:00
    • Test Instruments 00:10:00
    • Instrument Ratings 00:10:00
    • Personal Protective Equipment 00:50:00
    • Tools & Equipment 00:10:00
    • Work Area Safety 00:10:00
    • Alerting Others 00:10:00
    • Conductive Work Locations 00:10:00
    • Electrical Systems 00:20:00
    • Overcurrnet Protection 00:10:00
    • System Markings 00:10:00
    • Circuit ID 00:10:00
    • Its Your Job 00:10:00
    • Electrical Safety Checklist 4 weeks
    • Fire Risk Assessment 4 weeks
    • General Electrical Safety Training Test 00:45:00

About the instructor

5 5

Instructor Rating

6

Reviews

4637

Courses

24151

Students

Profile Photo
OpenCoursa
We are an educational and skills marketplace to accommodate the needs of skills enhancement and free equal education across the globe to the millions. We are bringing courses and trainings every single day for our users. We welcome everyone woth all ages, all background to learn. There is so much available to learn and deliver to the people.