Limited Licensed Electrician (LLE) Practice Test 2026 - Free Electrician Exam Questions and Study Guide

To determine how many 8 AWG THHN conductors can be installed in a 1-inch EMT conduit, it's important to reference the appropriate code, specifically the National Electrical Code (NEC). The NEC provides tables that specify the maximum allowable fill for various types of conduit based on the conductor size and type.

For 8 AWG conductors, the ampacity and fill calculations are essential. When you refer to NEC Table 1 in chapter 9, which addresses the maximum fill for raceways, you will find that for a 1-inch EMT, the allowable fill for THHN insulation is calculated based on the cross-sectional area of the conductors compared to the cross-sectional area of the conduit.

According to these tables, the maximum number of 8 AWG THHN conductors allowed in a 1-inch EMT conduit, based on the 40% fill rule for more than two conductors, is nine. This accounts for safe management of heat and avoids overcrowding of the wires, which can lead to overheating and potentially hazardous conditions.

Thus, the figure of nine conductors aligns with both the physical limitations of the conduit and the safety requirements defined in the NEC, making it the accurate answer for the scenario presented.