The Empty Distribution Box provides blank enclosures for custom electrical configurations, offering IP65-rated steel/PC shells with DIN-rail slots and knockout panels. These boxes come in a range of sizes to suit the configuration of your installation, from 1 to 4 rows. These Distribution Boxes enable decentralized installation of the electronics close to the load. SMART DISTRIBUTION BOXES FOR FLEXIBLE BUILDINGS. de Return Policy: Amazon's Voluntary, 30-Day Returns Guarantee: Without affecting your statutory rights, you can return many items within 30 days of receipt. Surface-Mounted. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge protective devices.