Conductor Sizing and Derating

Course Description

This course provides participants with a chance to become familiar with ampacity and the tables in NEC Article 310 and how to properly apply correction and adjustment factors. Once students have appropriately applied the derating values, they will work on selecting the correct wire size, type, ampacity, temperature, and voltage rating. This course will also cover a discussion on the importance of voltage drop on new installations and how to calculate for it. Supplemental handouts included in cost of course.

Continuing Education Credit

This course has been approved by Washington State L&I for:

  • Electrical Trainees
    • 8 hours Basic Classroom Training
    • Course #: WA2020-028
  • Journey-level Electricians
    • 8 hours Industry Related
    • Course #: WA2020-028
  • Plumbers and Plumber Trainees
    • 8 hours Industry Related Electrical
    • Course #: WA2021-362

This course has been approved by State of Idaho Division of Building Safety for Electricians.

  • 8 hours Industry Related
  • Course #: 20-893238

Class Times

  • 8:00AM – 5:00PM

Required Books/Materials

  • 2020 NEC Code Book
  • Paper
  • Pen/Pencil


Classroom Information