Dimensions of Temporary Secondary Distribution Box

Secondary temporary distribution boxes typically have dimensions around 2 mm thick GI sheet enclosures with tolerances of ±10%, designed for outdoor use with IP-55 protection.

Typical Construction and Materials

Secondary temporary distribution boxes are generally fabricated from 2 mm galvanized iron (GI) sheet steel for durability and outdoor use, with reinforced channels for structural stability and provisions for handles and locking systems. The roof is slightly slanted with a 50 mm overhang to prevent water ingress, and doors are equipped with Godrej-type 3-position locks and concealed hinges. The boxes include solid earthing points on either side and are designed to meet IP-55 protection standards.

Dimensions and Tolerances

Height, Width, Depth: While exact dimensions vary by manufacturer, the specifications allow for ±10% tolerance over the nominal dimensions provided in drawings. This flexibility enables customization based on site requirements. Internal Layout: Provision for bus bars, MCCBs, and outgoing feeders is included, with adequate clearance from the enclosure body to comply with electrical safety standards.

Cable Entry: Heavy-duty, double-compression cable glands are provided at the bottom for incoming and outgoing cables. Detachable plates may be used for fixing cable glands.

Electrical Ratings and Features

Designed for low-voltage distribution in temporary setups, often paired with transformers or generators. Can accommodate multiple MCCBs and busbar arrangements, with metallic or heat-resistant insulating barriers between components. Optional internal lighting and identification nameplates are included for operational convenience.

Practical Considerations

Boxes are UL-listed or conform to IS standards for safety and durability. Sizes may be adjusted depending on KVA rating, number of circuits, and site-specific requirements. For example, temporary power boxes may include 6- to 8-circuit configurations with compact, portable designs.

Mounting is typically off the floor to avoid water, dust, or mud exposure. In summary, secondary temporary distribution boxes are robust, outdoor-rated enclosures with customizable dimensions, typically fabricated from 2 mm GI sheet, with IP-55 protection, reinforced structure, and flexible internal layouts to accommodate MCCBs, busbars, and cable entries, with tolerances of ±10% over nominal dimensions.