Branch Circuits: History and Understanding

Course Description

Branch circuits are the portion of a wiring system that extend beyond the circuit protection device, such as a fuse or circuit breaker. This course will examine branch circuits, how they have evolved, and their relation to the NEC. Participants will be guided through a basic history of circuits; review Romex, Nob and Tube, and BX Wiring Systems; and learn how to calculate modern branch circuits as per the 2020 NEC. 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 # WA2022-087
  • Journey-level Electricians, Electrical Administrators & Master Electricians
    • 8 hours Industry Related
    • Course # WA2022-087
  • Plumbers & Plumber Trainees
    • 8 hours Industry Related Electrical
    • Course #: WA2021-362

Class Times

  • 8:00AM – 5:00PM

Required Books/Materials

  • 2020 or 2023 NEC Code Book
  • Calculator
  • Paper
  • Pen/Pencil


Classroom Information


Class Full

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