Tricel EB0012 White Surface Mounted BS 8567 Electrical Meter Box with Door (596 x 410 x 220mm) is a manufactured from high-quality glass reinforced polymers (GRP) and is supplied with a timber backboard, hinges, lock and access key. Electrical enclosure sizes are not universal, but most manufacturers follow common size families. This guide explains typical wall-mount and floor-standing dimensions, how to read catalog sizes, and how to choose the right enclosure size for your layout. Power delivered through 3 phase is ideal for farm and commercial needs, using big machinery. Overall size: Wide 400mm x High 500mm x Deep 245mm. 4 in stock (can be backordered) SKU: LG405024 This large. Choosing the correct electrical box dimensions is essential for safe wiring, code compliance, and long-term reliability.