Power distribution boxes come in various sizes from single-gang to large industrial enclosures, with prices ranging from $50 for basic residential units to several thousand dollars for high-capacity industrial systems.

Standard Sizes

Wall-Mount Enclosures (Residential/Light Commercial)

• Typical dimensions: 200 × 200 × 120 mm up to 800 × 600 × 300 mm
• Single-gang: accommodates one device
• Double-gang: accommodates two devices
• Multi-gang: accommodates multiple devices, often used for larger residential or small commercial setups Freestanding Cabinets (Commercial/Industrial)
• Height: 1600–2200 mm
• Width: 600–1800 mm
• Depth: 300–600 mm
• Designed for high-amperage systems, multiple circuits, and heavy-duty applications Industrial Metal Enclosures
• Customizable sizes for telecom, solar, control panels, and power distribution
• Depth and internal volume are critical for conductor space, heat dissipation, and future expansion Specialty Features
• High IP-rated units (IP44/IP67) for weatherproofing
• Pre-wired options for faster installation
• Fire-rated and corrosion-resistant materials for safety and durability

Pricing Overview

Residential Units

• Basic single-phase boxes: $50–$200
• 200A upgrades for EV-ready homes: $200–$500
• Pre-wired or high IP-rated units: $300–$600 Commercial and Industrial Units
• Multi-circuit, three-phase systems: $500–$2,000+
• Outdoor-rated, weatherproof, or custom enclosures: $1,000–$5,000+
• Advanced features like smart monitoring, surge protection, and load management increase cost but improve long-term reliability

Selection Tips

1. Determine the number of circuits and devices to avoid overcrowding.
2. Consider future expansion, especially for EV chargers or smart home systems.
3. Check environmental ratings (IP, NEMA) for outdoor or industrial installations.
4. Verify compliance with local electrical codes and standards (NEC, IEC).
5. Plan for internal space: account for wall thickness, gaskets, and hardware when calculating usable volume . By matching the right size and features to your application, you ensure safety, compliance, and long-term reliability while optimizing cost.