Construction Book Express     Print Page
PO Box 5196
Janesville, WI 53547-5196

Phone Number: 608-743-8031
Fax Number: 608-743-8037
Toll Free Number: 1-800-253-0541
Toll Free Fax Number: 1-800-647-7233


2005 Mastering the NEC - Ampacities & Derating  VHS # 6

2005 Mastering the NEC - Ampacities & Derating VHS # 6
Item #: 4560-05
Author: W Marketing
Publisher: W Marketing
Format: Video
Your Price: $49.95
In Stock


Mastering the NEC videos can be used to train and re-train electrical staff!
There's no way you can memorize everything in the National Electrical Code. But if you understand why and what is intended, you will be better prepared to remember the details you need for every day use.

Mastering the NEC videos are designed to help electricians, designers, supervisors, contractors and maintainers understand the NEC.

Topics covered:

  • Ampacity Tables
  • Insulation Ratings
  • Number of Conductors
  • Wiring Insulation Dictionary
  • Ampacity Table Values & Footnotes 
  • Ambient Temp
  • Corrections
  • Derating Factors & Examples
  • Derating vs. Conduit Fill
  • Maintaining Spaces Between Conduits
  • Derating & Neutrals
  • Ampacity vs. Overcurrent Protection
  • Overcurrent Protection for Recepticle vs. Lighting Circuits
  • 60°, 70°, 90°C Insulation Application Limitations
Close Window