Conductor Ampacity & Derating (310.15)

The wrong column of Table 310.16 will fail you before you even leave the classroom.

Ampacity and derating questions are pure code-book navigation combined with arithmetic — master the table and the adjustment factors and these become the fastest points on the exam.

0% complete · 0/4 lessons · 0/2 quizzes passed

What you'll learn

Module 1
Table 310.16 & Temperature Ratings
60/75/90°C columns, THHN/THWN, and terminal temperature limits.
2 lessons · 3 questions
Module 2
Adjustment & Correction Factors
310.15(C)(1) conductor-count adjustment and 310.15(B) ambient temperature correction.
2 lessons · 4 questions