WA Commercial and Industrial Wiring (2023 NEC)

  • 8 Hour Course
  • $80.00

This eight-hour course explains the 2023 National Electrical Code’s (NEC) commercial and industrial installation requirements. Relevant changes or updates from the 2020 NEC are highlighted. 

After completing the course, Washington electricians will be able to: 

  • Define “Accessible” as it relates to equipment.   
  • List the qualities that testing agencies check when examining electrical equipment. 
  • Identify the minimum value required for the interrupting rating of a circuit breaker. 
  • Explain why an equipment’s terminal temperature rating is used to select the conductor ampacity. 
  • Describe when a feeder disconnect requires ground fault circuit interrupter (GFCI) protection. 
  • List examples of continuous and non-continuous loads. 
  • Calculate the minimum ampacity required of a feeder tap. 
  • Describe the purpose of an effective ground-fault current path. 
  • Interpret Table 310.12 to size phase conductors for dwelling unit services. 
  • List the basic requirements for sizing outlet and device boxes. 
  • List the general requirements for providing overcurrent protection to flexible bus systems. 
  • Describe the proper procedure for installing conductors in conduits.  
  • Identify when and how PVC, as a complete system, requires support. 
  • Understand the importance of using switches within their specified ratings and the types of permitted loads on switches. 
  • Identify where flexible cords are permitted to be used. 
  • Describe the level of detail required for circuit identification. 
  • Identify when more than one motor is allowed on a branch circuit.  
  • Describe how overcurrent protection protects a motor control center (MCC). 
  • Identify when a motor must have a disconnecting means within sight of the motor.  
  • Identify installations or activities that require ground fault circuit interrupter (GFCI) protection for personnel.  
  • Calculate the minimum ampacity required of feeder supply conductors for an industrial machine.
  • Course ID(s): WA2024-154
  • Approved By: Washington Department of Labor & Industries

Instructor Bio

Jerry Durham

Jerry previously served the state of North Carolina as a Level III electrical inspector and provided state-approved electrical training for electrical inspectors at both Alamance County and Guilford County (NC) Community Colleges. Jerry taught the Kentucky state-approved four-year electrical apprenticeship programs offered by the Independent Electrical Contractors (IEC) Trade School and Associated Builders and Contractors (ABC) Trade School, and served the state of Kentucky as a Master Electrician and Louisville Metro Code Enforcement Officer. Jerry is a Certified Distance Education Instructor (CDEI) and NCCER Core and Electrical Curriculum certified instructor. Jerry currently holds North Carolina and ICC electrical inspector accreditations and is recognized by the state of Washington as an approved electrical administrator.