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 DVD # 6

 2005 Mastering the NEC - Ampacities & Derating DVD # 6
Item #: DVD4560-05
Author: W Marketing
Publisher: W Marketing
Format: DVD
 Your Price: $49.95
 In Stock

Mastering the NEC DVDs can be used to train and re-train electrical staff!


Broadband - 6.1 MB Dial-Up - 1003 KB
If you have problems seeing the clips, download the latest version of Windows Media Player by clicking here.


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 DVDs 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