How far must open conductors installed outside be separated from open conductors of other circuits or systems?

When considering the installation of open conductors outside, a separation distance is crucial for safety and compliance with electrical codes. The National Electrical Code (NEC) specifies that open conductors of different circuits or systems must maintain a minimum separation to prevent potential electrical hazards such as short circuits or interference.

The correct separation distance is 4 inches. This distance helps to ensure that the conductors do not come into contact with each other and mitigates the risk of electrical faults that could lead to equipment damage or fire. By maintaining this distance, installers enhance the overall safety and reliability of the electrical system, as well as facilitate maintenance and accessibility.

In contrast, shorter distances like 2 inches, 3 inches, or any measurement less than 4 inches do not meet the standards set out for outdoor installations. These inadequate separations could result in increased risk, negating safety measures that are critical in managing electrical installations in outdoor environments.