Room Secondary Distribution Box Size and Price

Room secondary distribution boxes typically range from 6 to 24 ways, with prices between $30 and $200 depending on capacity, material, and features.

Size and Capacity

Room secondary distribution boxes, also called DB boxes or consumer units, are designed to distribute electricity safely to individual circuits within a room or small area. Common sizes are based on the number of ways (slots for circuit breakers): 6–12 ways: Suitable for small rooms or apartments with basic lighting and socket circuits. 12–18 ways: Ideal for medium-sized rooms or areas with additional high-power appliances like air conditioners or water heaters.

18–24 ways: Used in larger rooms or small commercial spaces requiring multiple dedicated circuits and future expansion. Physical dimensions vary by manufacturer, but typical wall-mounted boxes measure approximately 300–600 mm in height, 200–400 mm in width, and 100–150 mm in depth. High IP-rated boxes (IP44–IP65) are available for moisture-prone areas like kitchens or bathrooms.

Material and Protection Features

Material: Polycarbonate (PC) plastic or metal enclosures.

P

C plastic is flame-retardant, UV-resistant, and self-extinguishing, suitable for indoor and semi-outdoor use. Protection: Includes miniature circuit breakers (MCBs), residual current devices (RCDs), surge protection, and overvoltage/undervoltage protection. IP-rated boxes provide dust and water resistance for safety.

Price Range

The cost of a room secondary distribution box depends on size, material, and additional features: Basic 6–12 way plastic boxes: $30–$6012–18 way boxes with MCBs and RCDs: $60–$120High-end 18–24 way waterproof or pre-wired boxes: $120–$200 or more Commercial or industrial-grade boxes with higher amperage, three-phase support, or smart monitoring features can exceed $300.

Selection Tips

Determine the number of circuits needed for lighting, sockets, and high-power appliances.

Check I

P rating for moisture or dust exposure. Consider future expansion by choosing a box with spare ways. Verify compliance with local electrical codes (IEC, NEC, or regional standards).

Choose pre-wired or modular options for easier installation and maintenance. By selecting the right size and features, a room secondary distribution box ensures safe, reliable, and efficient power distribution for residential or small commercial spaces.