How many #14 AWG conductors can be pulled through a 4 x 1-1/4" square box?

To determine how many #14 AWG conductors can be pulled through a 4 x 1-1/4" square box, it's essential to understand the concept of box fill calculations as prescribed by the National Electrical Code (NEC). The NEC provides guidelines on the volume allowances for conductors, devices, and fittings in electrical boxes to ensure safety and prevent overheating.

A 4 x 1-1/4" square box has a volume of 21 cubic inches. For #14 AWG conductors, each conductor occupies a certain volume. According to NEC guidelines, each #14 AWG solid or stranded conductor requires 2 cubic inches of box space.

To find the maximum number of conductors that can fit into the box, you divide the total volume of the box by the volume required for each conductor. In this case:

• The total volume of the box is 21 cubic inches.

• Each #14 AWG conductor requires 2 cubic inches.

When you perform the calculation:

21 cubic inches / 2 cubic inches per conductor = 10.5 conductors

However, since you cannot have a fraction of a conductor, you round down to 10 conductors.

It's important to account for additional space