What is the minimum spacing required between open conductors on different circuits?

The requirement for minimum spacing between open conductors on different circuits is established to prevent electrical interference and ensure safety. The National Electrical Code (NEC) specifies a minimum spacing of 3 inches to reduce the risk of electrical arcing and to maintain the integrity of the circuit. Adequate spacing helps to mitigate issues such as signal interference, which can occur when conductors are too close together, particularly if they are carrying different voltages or types of current. This standard recognizes the importance of maintaining a safe environment for both the installation and ongoing use of electrical systems by minimizing the potential for shorts or other electrical failures that could arise from improper conductor placement.