What is the primary focus when determining if a feeder to a separate building is Code-compliant?

The primary focus when determining if a feeder to a separate building is Code-compliant is the presence of a grounding conductor. In electrical installations, especially when dealing with separate structures, the grounding system is crucial for ensuring safety and protection against electrical faults. A grounding conductor provides a path for fault currents to safely dissipate into the earth, thereby minimizing the risk of shock hazards and equipment damage.

The National Electrical Code (NEC) outlines specific requirements for grounding and bonding to ensure that separate buildings are equipped with sufficient grounding systems. This includes considerations for potential differences that might exist between the grounding systems of different structures. Ensuring that a grounding conductor is present and adequately sized helps enforce safe operation and compliance with electrical codes.

While the size of the conductor, type of building served, or source of power supply are also important factors in designing an electrical system, they do not take precedence over ensuring there is an effective grounding system in place. The presence of a grounding conductor is fundamental to the overall safety and Code compliance of the electrical installation in separate buildings.