Electrical Safety: Safety and Health for Electrical Trades PDF

Electrical Safety: Safety and Health for Electrical Trades PDF

Download Electrical Safety: Safety and Health for Electrical Trades PDF book free – From Electrical Safety: Safety and Health for Electrical Trades: Whenever you work with power tools or on electrical circuits there is a risk of electrical hazards, especially electrical shock. Anyone can be exposed to these hazards at home or at work.

Electrical Safety: Safety and Health for Electrical Trades

Workers are exposed to more hazards because job sites can be cluttered with tools and materials, fast-paced, and open to the weather. Risk is also higher at work because many jobs involve electric power tools. Electrical trades workers must pay special attention to electrical hazards because they work on electrical circuits. Coming in contact with an electrical voltage can cause current to flow through the body, resulting in electrical shock and burns. Serious injury or even death may occur.

As a source of energy, electricity is used without much thought about the hazards it can cause. Because electricity is a familiar part of our lives, it often is not treated with enough caution. As a result, an average of one worker is electrocuted on the job every day of every year! Electrocution is the third leading cause of workrelated deaths among 16- and 17-year-olds, after motor vehicle deaths and workplace homicide. Electrocution is the cause of 12% of all workplace deaths among young workers.

This manual will present many topics. There are four main types of electrical injuries: electrocution (death due to electrical shock), electrical shock, burns, and falls. The dangers of electricity, electrical shock, and the resulting injuries will be discussed. The various electrical hazards will be described. You will learn about the Safety Model, an important tool for recognizing, evaluating, and controlling hazards. Important definitions and notes are shown in the margins. Practices that will help keep you safe and free of injury are emphasized. Electrical Safety: Safety and Health for Electrical Trades PDF

To give you an idea of the hazards caused by electricity, case studies about real-life deaths will be described. How Is an Electrical Shock Received? An electrical shock is received when electrical current passes through the body. Current will pass through the body in a variety of situations. Whenever two wires are at different voltages, current will pass between them if they are connected. Your body can connect the wires if you touch both of them at the same time. Current will pass through your body.

Contents

Page
Section 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Electricity Is Dangerous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
How Is an Electrical Shock Received? . . . . . . . . . . . . . . . . . . . . . 2
Summary of Section 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Section 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dangers of Electrical Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Summary of Section 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Section 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Burns Caused by Electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical Fires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Summary of Section 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
First Aid Fact Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Section 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Overview of the Safety Model . . . . . . . . . . . . . . . . . . . . . . . . . . 18
What Must Be Done to Be Safe? . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Summary of Section 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Section 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Safety Model Stage 1—Recognizing Hazards . . . . . . . . . . . . . . . . . 22
How Do You Recognize Hazards? . . . . . . . . . . . . . . . . . . . . . . . . 22
Inadequate wiring hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Exposed electrical parts hazards . . . . . . . . . . . . . . . . . . . . . . . 24
Overhead powerline hazards . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Defective insulation hazards . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Improper grounding hazards . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Overload hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Wet conditions hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Additional hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Summary of Section 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Section 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Safety Model Stage 2—Evaluating Hazards . . . . . . . . . . . . . . . . . . 34
How Do You Evaluate Your Risk? . . . . . . . . . . . . . . . . . . . . . . . . 34
Summary of Section 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Electrical Safety: Safety and Health for Electrical Trades PDF

Section 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Safety Model Stage 3—Controlling Hazards:
Safe Work Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
How Do You Control Hazards? . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
How Do You Create a Safe Work Environment? . . . . . . . . . . . . . . 36
Lock out and tag out circuits and equipment . . . . . . . . . . . . . . 37
Lock-out/tag-out checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Control inadequate wiring hazards . . . . . . . . . . . . . . . . . . . . . 39
Control hazards of fixed wiring . . . . . . . . . . . . . . . . . . . . . . . . 40
Control hazards of flexible wiring . . . . . . . . . . . . . . . . . . . . . . 40
Use flexible wiring properly . . . . . . . . . . . . . . . . . . . . . . . . 40
Use the right extension cord . . . . . . . . . . . . . . . . . . . . . . . . 42
Control hazards of exposed live electrical parts: isolate
energized components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Control hazards of exposure to live electrical wires:
use proper insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Control hazards of shocking currents . . . . . . . . . . . . . . . . . . . . 46
Ground circuits and equipment . . . . . . . . . . . . . . . . . . . . . . 46
Use GFCI’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Bond components to assure grounding path . . . . . . . . . . . . 49
Control overload current hazards . . . . . . . . . . . . . . . . . . . . . . . 50
Summary of Section 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Section 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Safety Model Stage 3—Controlling Hazards: Electrical Safety: Safety and Health for Electrical Trades PDF
Safe Work Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
How Do You Work Safely? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Plan your work and plan for safety . . . . . . . . . . . . . . . . . . . . . 55
Ladder safety fact sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Avoid wet working conditions and other dangers . . . . . . . . . . . 61
Avoid overhead powerlines . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Use proper wiring and connectors . . . . . . . . . . . . . . . . . . . . . . 61
Use and maintain tools properly . . . . . . . . . . . . . . . . . . . . . . . 64
Wear correct PPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
PPE fact sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Summary of Section 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Glossary of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Endnotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Photo and Graphics Credits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

This document is designed to teach learners in secondary and postsecondary electrical trades courses to recognize, evaluate, and control hazards associated with electrical work, The manual’s eight sections each include some or all of the following components: instructional text; definitions; case studies illustrating key safety considerations; fact sheets; checklists; and a section summary. Sections 1-3 examine the dangers of electricity, the dangers of electrical shock, and electrical burns. Section 4 presents an overview of a three-stage model for recognizing hazards in workplaces where electrical work is performed, evaluating hazards, and controlling identified hazards.Electrical Safety: Safety and Health for Electrical Trades PDF

The following are among the specific topics covered in sections 5-8, which address the model’s individual stages: (1) recognizing hazards (inadequate wiring, exposed electrical parts, overhead power lines, defective insulation, improper grounding, overloads, wet conditions); (2) evaluating hazards; (3) controlling hazards by developing a safe work environment (locking out and tagging out circuits and equipment; isolating energized components; insulating properly; using ground circuits and equipment); and (4) controlling hazards through safe work practices (work plans, safety plans, ladder safety, precautions in wet conditions, proper wiring, tool maintenance, personal protective equipment). A glossary, endnotes, and an appendix listing pertinent Occupational Health and Safety Administration standards are included. (MN) — Source: Researchgate

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