- **Switch box**: The thickness of the steel plate of the box body shall not be less than 1. 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. The. For most control panels and distribution boxes, choose the mounting plate by checking six items in this order: Enclosure size and hole pattern – the plate must match the enclosure body and fixing points. Material – steel, galvanized steel, stainless steel, aluminum, or non-metallic material. Using a panel means you won't need to make holes in the body of your enclosure, which could let in dust and water. White Painted Steel— White painted steel panels work for most applications. Different incoming devices are available withi d outgoing devices.