Inspecting Commercial Electrical Systems

Discover the unique challenges present when inspecting a commercial building’s electrical systems.


Upon completion of ASHI’s Inspecting Commercial Electrical Systems class, you will be able to:

  • Identify the proper safety procedures, personal protective equipment (PPE), and arc-flash protection needed during a commercial electrical inspection
  • Describe the types and sizes of services within a report
  • Relate the unique characteristics of commercial electrical systems
  • Recall the common voltages used in commercial settings
  • Summarize the science and functions of three-phase electric supplies
  • Identify the basics of standby systems and backup generators
  • Describe uninterruptable power systems (UPS)
  • Outline the similarities and differences between residential and commercial electrical systems
  • Recognize various aspects of transformers like utility owned, private owned, size ratings, and application purposes

This full-day class is ASHI and TN state-approved for CE Credit. This means that participants will be rewarded with a total of 6 CE credits upon its completion.

Meet Your Instructor


Mike Twitty recently retired after 17 years in the general inspection and compliance inspection fields. He is a licensed electrician and is certified by the ICC and IAEI as a residential building inspector and residential electrical inspector.


Prior to becoming a home inspector, he retired from a 30-year career with Ford Motor Company where he worked as an industrial electrician. Mike currently provides continuing education training


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