Healthy Homes, Part 11: Electricity Course

Welcome to InterNACHI's free, online Healthy Homes, Part 11: Electricity Course.  This is part 11 of a 14-part Certified Healthy Homes Inspector certification program provided by InterNACHI to members for free. 
The goal of this course is to teach the student how to inspect the electrical system and components of a house. 
Upon successful completion of this course, the student will be able to: 
  • describe general code and standards related to the electrical systems of a house;
  • define terms related to electricity;
  • describe the electrical service; 
  • distinguish between types of wiring and wire sizes; 
  • describe the function of electrical panels and overcurrent devices; 
  • obvious evidence of insufficient power supply; 
  • list common electrical violations; 
  • apply inspection tips and steps; 
  • perform an inspection related to electricity; 
  • generate observations related to inspecting electrical systems and components; and 
  • produce written reports related to observations conducted at a house.

Course Includes:
  • 21 InterNACHI CE credits
  • 2.1 CEU
  • 11,200 words
  • 20 quiz questions in three quizzes
  • Inspection and writing assignment
  • Research and writing assignment
  • 30-question final exam
  • Certificate of Completion

You will learn about the following topics: 
  • Benjamin Franklin
  • Flow of electric current
  • Definitions of terms related to electricity
  • Electric service entrances
  • Grounding
  • Two- or three-wire electric services
  • Residential wiring adequacy 
  • Wire sizes and types 
  • Wire sizes
  • Wire types
  • Types of cable 
  • Flexible cords
  • The cord standards
  • Safety suggestions
  • Wiring
  • Electrical service panel
  • Over-current devices
  • Circuit breakers
  • Ground-fault circuit interrupters
  • Arc-fault circuit interrupters
  • Fused ampere service panel
  • Electrical circuits
  • Outlet switches and junction boxes
  • Grounding outlets
  • Polarized plugs and connectors
  • Common electrical violations
  • Excessive or faulty fusing
  • Six situations that can cause danger
  • Cords that run through walls and doorways
  • Temporary wiring
  • Excessively long extension cords
  • Dead or dummy outlets
  • Aluminum wiring inside the home
  • Inspection steps
This course has been approved by:
Healthy Homes, Part 11: Electricity Course

Course # 4822



Estimated hours for the average student

Academic Engagement

Reading online course instructional material at 140 words per minute


Taking quizzes 


Taking the exam


Conducting a directed and independent inspection study performed according to the Standards of Practice, including the development of an inspection report 


Submitting an inspection and writing assignment

Submitting a research and writing assignment 0.5




Studying and reviewing instructional material in preparation for taking quizzes and exam 


Reading the downloaded student course book including taking the quizzes with the book 1.0
Reading, research, and studying related to completing the research and writing assignment 1.0
Studying and preparing for inspection processes according to a Standards of Practice, including capturing and storing digital images with a camera or device, making observations, evaluating conditions, deducing, formulating opinions, communicating observations in written form, attaining competency in performing inspections and using an inspection checklist or software and other inspection tools in producing a report. 10.0



Sub Total


Overall Total

21 hours

2.1 CEU

And, in keeping with InterNACHI's commitment to Continuing Education, this online course is open and free to all members, and can be taken again and again, without limit.
Reminder to members:  InterNACHI's Code of Ethics 1.10 requires that you comply with all government rules and licensing requirements of the jurisdiction where you conduct business.  InterNACHI's courses and Standards generally exceed the Standards of Practice that you are required to abide by locally.