Landscape power distribution boxes are typically compact, with dimensions ranging from small enclosures around 16" H × 12" L × 5.9" W to larger prefabricated units for 200–2000 kVA substations.

Typical Sizes

• Small residential or commercial landscape boxes: These are often designed for outdoor use with weatherproof enclosures and internal mounting panels. A common example is 16 inches high, 12 inches long, and 5.9 inches wide, suitable for low to medium power distribution needs (Amazon product example) .
• Medium to large prefabricated landscape substations: For higher capacity applications (200 kVA to 2000 kVA), these units are delivered fully assembled and compact relative to their capacity. They integrate primary high-voltage equipment, three-phase transformers, and secondary low-voltage distribution, minimizing space while maintaining functionality .

Design Considerations

• Weatherproofing: Outdoor boxes must meet NEMA or IP ratings (e.g., NEMA 3R or 4) to withstand rain, dust, and environmental exposure .
• Internal layout: Includes bus bars, circuit breakers, main disconnects, and grounding systems. The compact design ensures minimal footprint while allowing safe and efficient power distribution .
• Installation: Smaller boxes can be wall-mounted or placed on a concrete pad, while larger prefabricated units are delivered as single-lift assemblies for direct site installation .

Summary

The size of a landscape power distribution box depends on its capacity and application. Small boxes for residential or light commercial use are typically under 2 feet in height and width, while larger prefabricated substations for commercial or industrial applications are compact relative to their high power rating but significantly larger than residential units. Proper selection should consider both physical space and electrical load requirements to ensure safety and compliance with NEC and NEMA standards .