Question

Name several factors that must be taken into account when sizing boxes per the NEC.

Answer 1

When sizing boxes per the NEC, factors to consider include ampacity, conductor fill, and wire bending space.

When sizing boxes per the NEC (National Electrical Code), several factors must be taken into account:

1. Ampacity: The amperes required for proper operation of electrical appliances, fuses, and circuit breakers. The box must be sized based on the total amperage of the connected devices.
2. Conductor Fill: The NEC specifies the maximum number and size of conductors allowed in a box based on its dimensions. This ensures proper spacing and prevents overheating.
3. Wire Bending Space: Sufficient space is required to make bends in the wires without damaging them. The NEC provides guidelines on the minimum bending radius and space required.