2020 Formula Insert Pages by Tom Henry

Tom Henry's 14 pages of calculation formulas and formats. Pre-drilled to fit inside the 2020 Looseleaf Code book, these inserts are a excellent guide to help you with those hard to remember formulas. A great study tool to help you get ready for the electrical exam.
Some of the important formulas included are for exact K, voltage drop, efficiency, ohm's law, kva, transformers, ambient corrections, nipple fill, motor calculation steps, motor fill, and more.