What is the maximum number of 2/0 AWG THHN/THWN conductors allowed in an 8" x 8" wireway?

To determine the maximum number of 2/0 AWG THHN/THWN conductors allowed in an 8" x 8" wireway, one must refer to the National Electrical Code (NEC) and the specific fill calculations for wireways.

An 8" x 8" wireway provides a certain volume that can be filled with conductors, and the NEC establishes that conductors must not exceed a specific fill limit to maintain adequate heat dissipation and avoid potential overheating issues. For conductors like THHN or THWN, which have a standard fill limit outlined in NEC calculations, the size and type of wire will impact how many can safely be installed.

For 2/0 AWG conductors, the NEC table provides necessary data on cross-sectional area, and with the wireway size (8" x 8"), we can compute the total fill area available. Typically, the calculations will consider the conductor's outside diameter, the fill ratio stipulated in the NEC, and the total volume allowance for the wireway itself.

After applying these calculations for 2/0 conductors specifically in an 8" x 8" wireway, the standards and formulas lead to a conclusion that the maximum number of conductors