Since you couldn’t possibly memorize everything in the National Electrical Code, now you can get visual instruction on the important changes as they apply to your job. The 2008 Mastering the NEC series of DVDs offers practical explanations on Code changes, why they were made, and how they can be applied at work.

Mastering the NEC 2008 DVDs are designed to help electricians, designers, supervisors, contractors and maintenance personnel understand the NEC. They can also be used to train and re-train electrical staff. This video's running time is 77 minutes.

Topics covered in the Ampacities & Derating DVD:

• Introduction, Table 310.16
• Derating Calculations
• Grounding Conductors – Neutrals
• Harmonics
• Wire Sizing & Color Coding
• Paralleling Conductors
• Ampacity Tables
• Flexible Cord Ampacities
• 60, 75 & 90ºC Insulation Ratings
• Summary