In the context of PV systems, what is the defined distance from the array for the term array boundary?

The term "array boundary" in the context of photovoltaic (PV) systems specifically refers to the defined clearance area surrounding the solar array. This boundary is established to ensure safety, operations, and maintenance of the solar installation.

The correct distance for the array boundary is set at 1 foot as per the National Electrical Code (NEC). This clearance is crucial for allowing access to the array for service and maintenance while also providing a safety buffer to mitigate risks associated with electrical hazards. Maintaining this specified distance helps ensure that individuals working near the array can do so safely without coming too close to electrical components that may present shock or arcing hazards.

While the other distances might be applicable in other contexts or codes, the NEC specifically defines the array boundary as 1 foot to align with safety and operational recommendations for PV installations. This ensures that there is a standardized approach to the spacing requirements for PV systems, thereby promoting safer practices across the industry.