What is the maximum number of 10 AWG THWN conductors that can pass through a metal wireway that is 4 inches wide and deep?

To determine the maximum number of 10 AWG THWN conductors allowed to pass through a metal wireway with specified dimensions, we utilize the calculations based on the National Electrical Code (NEC) guidelines.

The NEC provides fill tables that help determine how many conductors can be accommodated within a given conduit or wireway based on the size and type of the conductors, as well as the internal dimensions of the wireway. In this case, for 10 AWG THWN conductors, the ampacity and fill requirements set by the NEC are considered.

A metal wireway that is 4 inches wide and deep has a cross-sectional area that can accommodate multiple conductors. For 10 AWG conductors, the standard fill ratio must be followed to ensure proper airflow and prevent overheating. Using calculations based on the number of conductors per square inch, which is closely associated with the dimensions of the wireway, the maximum number of conductors that can safely fit is derived.

Based on these calculations and the NEC regulations, it can be determined that 151 conductors is the appropriate maximum number that can pass through the wireway without exceeding the fill capacity. This value accounts for the specified dimensions and ensures compliance with electrical safety standards.