What is the minimum internal depth required for boxes enclosing 12 or 10 AWG conductors?

The minimum internal depth required for boxes enclosing 12 or 10 AWG conductors is 1 3/16 inches. This specification is important for ensuring that the conductors have enough space inside the box to prevent damage and allow for proper bending and termination. When conductors are in a box, they should not be cramped, as this can lead to insulation damage or increased heat, which can create safety hazards.

Using the correct depth also ensures compliance with the National Electrical Code (NEC) guidelines, which are designed to promote safety in electrical installations. Adequate box depth accommodates connectors and splices, ensuring that conductors can be handled safely without risking damage to the wiring or creating a fire hazard due to overheating.

In summary, the specified depth of 1 3/16 inches provides the necessary space for 10 and 12 AWG conductors, supporting safe and compliant electrical work.