RedVector RV-11109

2017 NEC Changes: Conductors and Wiring Methods

2017 NEC Changes: Conductors and Wiring Methods

1 hr. Online Course

Level: Intermediate

Item#: RV-11109

SME: Ryan Jackson

Chapter 3 of the 2017 National Electrical Code contains requirements for conductor sizing and wiring methods. Several changes were made in Article 310 and the articles covering cable and raceway wiring methods [320-399]. In this interactive, online course, we will discuss several changes in Chapter 3 including 310.15(A)(2) Selection of Ampacity, 310.15(B)(3)(c) Raceways and Cables Exposed to Sunlight on Rooftops, and 310.15(B)(7) Single-Phase Dwelling Unit and Feeder Service Conductors. We will discuss the listing requirements in the Chapter 3.6 section and the .30 sections for securing and supporting throughout chapter 3. We will also examine 336.10 Uses Permitted for (TC cable) or tray cable and 338.10(B)(4)(a) Uses Permitted for service entrance cable or (SE cable), and review 344.14 Dissimilar Metals in Rigid Metal Conduit Systems (RMC). Other topics covered in the course include 350.28 Trimming of Liquidtight Flexible Metal Conduit (LFMC), 358.10 Uses Permitted for EMT. 376.20 Conductors in Parallel for Metal Wireways, and 392.22(A), which covers the number of conductors in (cable trays).
Course Objectives
By the end of this course, you will be able to:
  • Understand the changes for conductor ampacity in Article 310
  • Describe the listing requirements for cable wiring methods and the new support rules
  • Explain the new allowances for tray cable
  • Describe the permitted uses for EMT
  • Explain the rules for trimming liquid type flexible metal conduit
  • Understand the requirements for parallel conductors in metal wireways Know the changes for cable tray fill
SUBJECT MATTER EXPERT: Ryan Jackson
Ryan Jackson Photo
Ryan Jackson is a combination inspector in the Salt Lake City, Utah, area. He began his career as a carpenter while in high school, and began doing electrical work at the age of 18. At the age of 23 Ryan landed his first job as an electrical inspector, and subsequently became certified in building, plumbing, and mechanical inspection, as well as building and electrical plan review. Two years after becoming an inspector, he was approached by a friend in the area asking him to fill in at an electrical seminar for him. After his first class he was hooked, and is now a highly sought after seminar instructor. Ryan has taught in several states, and loves helping people increase their understanding of the Code.

 

He has been involved in writing and editing over 25 books on the National Electrical Code, and has taught the subject in multiple states and for multiple colleges and universities. He is self-employed as an NEC® consultant and inspector.

 
When Ryan isn’t working, he can often be found in his garage turning wood on his lathe, in his basement exercising, or any quiet place where he can dive into a book. He is also a rabid University of Utah football fan. Ryan married his high school sweetheart, Sharie, and they have two beautiful children together: Kaitlynn and Aaron.
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