Electrical Safety and Protection
Course Number: 725.2
The Electrical Safety and Protection textbook examines electrical hazards and stresses the importance of electrical safety. Covers the equipment and procedures necessary to work safely with electricity, including PPE, lockout/tagout, and first aid. Explains the importance of grounding. Describes many kinds of fuses, circuit breakers, and motor protection devices and their uses.
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Recommended Contact Hours – 11
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Table of Contents
Chapter 1: Electrical Hazards
Topics: Electrical safety, shock, arc; Hazardous electrical locations
Learning Objectives:
- List the three main factors that determine the effect of electric current on the human body.
- Explain what to do if a person is a victim of electric shock.
- Name four precautions you can take to guard against electric shock.
- Define the term qualified person.
- Summarize the basic rules of electrical safety.
Chapter 2: Electrical Safety Equipment
Topics: Work clothes; PPE; Foot, head, eye, and face protection; Gloves; Respiratory protection; Lockout devices; Voltage testers
Learning Objectives:
- Describe appropriate clothing and PPE to wear when working with electricity.
- Explain first aid procedures for eyes.
- Describe the devices used to lock out power.
- Tell how to keep plant personnel out of an area where electrical work is being performed.
- Explain the purpose of a voltage tester.
Chapter 3: Electrical Safety Procedures
Topics: Energy control; Lockout/tagout procedures; Using power tools safely; Power tool safety rules; Recognizing electric shock victims; First aid for shock victims
Learning Objectives:
- Explain the concepts of energy control and zero energy state.
- Summarize the OSHA lockout procedure.
- Explain how portable power tools are grounded.
- List some common symptoms of electric shock.
- Summarize the steps involved in administering CPR.
Chapter 4: The National Electric Code
Topics: Overview of the NEC; Chapter 1: General NEC; Chapter 2: Wiring and Protection; Chapter 3: Wiring Methods and Materials; Chapter 4: Equipment for General Use; Chapter 5: Special Occupancies; Chapter 6: Special Equipment; Chapter 7: Special Conditions; Chapter 8: Communications Systems; Chapter 9: Tables; Annexes
Learning Objectives:
- Understand the purpose and scope of the National Electrical Code.
- Define key terms related to the National Electrical Code.
- Determine requirements for electrical installations.
- Locate and reference common National Electrical Code articles.
- Identify common calculation tables.
Chapter 5: Grounding, Ground Faults, and Short Circuits
Topics: Grounding, Ground Faults, and Short Circuits - Equipment, circuit, and transformer grounding; Effects of impedance; Grounded conductor alarms; Detecting faults automatically; Static electricity
Learning Objectives:
- State the reason why circuits should be grounded.
- Explain how to test a circuit for proper grounding.
- Explain how a ground-fault circuit interrupter works.
- Contrast current electricity and static electricity and explain why each can be hazardous.
- Identify the correct extinguisher to use on flammable liquid fires and on energized electrical equipment fires.
Chapter 6: Fuses and Circuit Breakers
Topics: Purpose of a fuse; Lead-wire, cartridge, power, plug, and glass-tube fuses; Thermal-magnetic and low-voltage power circuit breakers; Circuit breaker tripping
Learning Objectives:
- Explain how a dual-element cartridge fuse works.
- List the NEC rules on installing fuses.
- Explain how a circuit breaker works.
- Describe molded-case circuit breakers.
- Explain the steps involved in fuse replacement and/or circuit breaker reset.
Chapter 7: Motor Protection
Topics: Feeder size; Branch circuits; Motor-running overcurrent protection; Inherent thermal protection; Temperature-sensing devices; Melting-alloy and bimetallic relays; Selecting motor protection; Single phasing; Overload relays
Learning Objectives:
- List the steps in determining the correct rating of the motor feeder protection.
- Explain how to select a thermal overload relay.
- Explain how thermostatic, resistance, and thermocouple detectors work.
- Contrast temperature-sensing devices and current-sensing devices.
- Explain how various relays provide motor protection.
- Define single phasing.
Add Chapters to Your Custom Book
Select Chapter(s):
- Chapter 1: Electrical Hazards
- Chapter 2: Electrical Safety Equipment
- Chapter 3: Electrical Safety Procedures
- Chapter 4: The National Electric Code
- Chapter 5: Grounding, Ground Faults, and Short Circuits
- Chapter 6: Fuses and Circuit Breakers
- Chapter 7: Motor Protection
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