For determining the maximum number of conductors in boxes, how many conductors are counted for each yoke or strap?

In electrical installations, when determining the maximum number of conductors that can be placed in a box, each yoke or strap is typically counted as accommodating two conductors. This standard is grounded in the National Electrical Code (NEC), which provides a framework for ensuring safe and effective wiring practices.

The rationale behind counting each yoke or strap as two conductors is primarily based on the design and space capacity of the box. A yoke or strap generally allows for the passage and connection of conductors coming in and out, hence allowing two conductors to be effectively accommodated per strap. This ensures that there is enough room for conductors without risking overcrowding, which could lead to overheating and other safety hazards.

This approach to counting also considers practical aspects of installation and maintenance, ensuring that electricians and other professionals can safely work within confined spaces while adhering to safety regulations.