Dimensions of Indoor Primary Distribution Box

Indoor primary distribution boxes typically range from 200 × 200 × 120 mm up to 800 × 600 × 300 mm for wall-mounted units, with model-specific variations depending on capacity and installation type.

Typical Sizes and Models

Indoor distribution boxes, such as the TS-DB series, are designed for wire termination in buildings and come in multiple capacities: 10, 20, 30, and 50 pairs using Insulation Displacement Contact (IDC) modules. These boxes can be installed directly on the wall or embedded in the wall, with an additional shell provided for embedded installations. The case, cover, and frame for mounting IDC modules are standard components, and the cover usually includes a locking mechanism for security and controlled access .

Standard Wall-Mount Enclosure Dimensions

For general wall-mounted electrical enclosures, typical dimensions range from 200 × 200 × 120 mm up to 800 × 600 × 300 mm, depending on the number of devices, cable entry space, and future expansion needs. Freestanding cabinets are larger, often 1600–2200 mm in height, 600–1800 mm in width, and 300–600 mm in depth. These dimensions account for external measurements; internal usable space is slightly smaller due to wall thickness, gaskets, and mounting hardware .

Considerations for Selection

• Capacity: Choose a box that accommodates the number of pairs or ways required (e.g., 10–50 pairs for TS-DB series).
• Installation type: Wall-mounted vs. embedded affects the overall dimensions and required shell.
• Wire management: Ensure sufficient depth for cable bending radius and splicing.
• Future expansion: Select a slightly larger box to allow for additional circuits or pairs.
• Compliance: Verify fire retardant and insulation standards, such as FV94-0 level and GB/T 5169.7-1985 for contact performance .

Example TS-DB Series Dimensions

While exact dimensions vary by model, typical TS-DB indoor distribution boxes for 30-pair modules are approximately 400–500 mm in height, 300–400 mm in width, and 100–150 mm in depth. Larger models for 50 pairs or more may reach 600 mm in height and 200–300 mm in depth, depending on manufacturer specifications . Selecting the correct indoor primary distribution box requires balancing capacity, installation type, and available space, while ensuring compliance with electrical and fire safety standards.