Conduit Fill Calculator | Southwire Conduit Fill Calculator Conduit Fill is the percent of area inside the conduit taken up by the cable(s). Provides quick and easy results for the conduit fill percent, per NEC® guidelines.[PDF] Explanation of Wire Charts - Terminal Supply Co Explanation of Wire Charts 22 GPT Insulation Thickness Stranding Nom. O.D. Inches Pounds Per 1/M Feet Reel Quantity Feet 7x30 4 5/m Basic Layout of the Wire Chart. 22 GPT Breakdown of Each Catagory Most of our wire part numbers are a combination of wire gauge, type of wire, spool size and then color. Not all numbers[PDF] Voltage Drop - Adams Electric size of something circular in shape — such as a wire. Wire size can be measured in several ways such as its diameter. We could say this wire has a diameter of ½ inch. Calculating the area of the cross-section with the common formula of Area = πr 2 or Area = [(π)(d/2) ] Types of Electrical Wires and Cables - The Home Depot The wire gauge indicates the electrical wire sizing, as defined by the American Wire (AWG) system. The most common gauges are 10, 12 or 14. The gauge and diameter of the wire are inversely related. In other words, as the gauge number gets higher, the diameter of the wire gets smaller. For example, a 10-gauge wire is bigger than a 12-gauge wire.