Outdoor charging distribution box specifications and dimensions

Outdoor charging distribution boxes are weatherproof, modular enclosures designed to safely distribute power to multiple EV chargers, with capacities ranging from 100A to 630A and IP55/NEMA-rated protection.

Key Specifications

Electrical Capacity and Configuration

• Designed for 400V AC 3-phase supply, with current ratings from 100A to 630A depending on the model (Lewden feeder pillars) .
• Supports multiple EV chargers: 7.4kW single-phase, 22kW, 43kW, and 50kW three-phase chargers .
• Outgoing circuits include individual overcurrent and residual current protection, with RCCBs suitable for bi-directional power flow for potential vehicle-to-grid (V2G) applications .
• Some distribution boards (ABB Kabeldon) include main switch fuses, transformer kits for CTs, and mounting plates for billing meters, allowing easy expansion for additional chargers . Construction and Materials
• Cabinets are typically made from 2mm Zintec mild steel or stainless steel for harsh environments .
• Vandal-resistant lockable doors with concealed hinges and high-quality seals protect against weather, vermin, and dust .
• Modular interior design with wiring grooves and reserved component positions ensures clear line paths and safe heat dissipation . Environmental Protection
• Standard ingress protection: IP55, suitable for outdoor exposure .
• Compliant with NEC Article 312, UL 50/50E, and NEMA 3R/4 standards for rain-tight and weatherproof enclosures .
• Designed to withstand extreme temperatures, humidity, and direct water exposure . Dimensions and Mounting
• Multiple sizes available; some manufacturers offer 16 different sizes to match various charging pile configurations, from household slow chargers to public fast chargers .
• Cabinets include large pre-drilled gland plates for armored cable termination and spacious base plinths for surface mounting on pre-cast concrete bases .
• Customization options include box size, internal layout, color, and nameplate content . Additional Features
• Supports easy expansion by adding incoming/outgoing power cables .
• Modular partitions allow for safe installation and maintenance of electrical components .
• Designed to meet BS7671:2018 +A2:2022 section 722 and Building Regulations Part S for multiple EV charging points . In summary, outdoor charging distribution boxes are robust, modular, and customizable enclosures that provide safe, weatherproof power distribution for multiple EV chargers. They are available in a range of sizes and capacities, with IP/NEMA-rated protection, modular interiors, and provisions for future expansion, ensuring compliance with international electrical standards and suitability for diverse outdoor environments.