A secondary distribution box with legs is a floor-standing or pedestal-style electrical enclosure designed to distribute power safely and efficiently in commercial, industrial, or temporary applications.

Overview

Secondary distribution boxes, also known as sub-distribution boards or pedestals, are used to distribute electrical power from a main supply to multiple circuits. When equipped with legs, these boxes are floor-standing, providing stability and easy access for installation and maintenance . They are ideal for locations where wall mounting is impractical or where temporary power distribution is required.

Types and Applications

1. Permanent Floor-Standing Sub-Distribution Boards
   • Typically used in industrial plants, office buildings, and large commercial sites.
   • Feature DIN rails, mounting plates, and generous wiring space for easy installation and future expansion.
   • Protection ratings can range from IP44 to IP55, ensuring resistance to dust and water .
   • Examples include ABB's floor-standing cabinets, which can handle up to 800 A for high-demand applications .
2. Temporary Power Distribution Boxes with Legs
   • Also called power spider boxes, these are used for construction sites, outdoor events, emergency services, and remote work locations.
   • Provide multiple outlets for connecting electrical loads and are designed to be stationary but accessible for temporary setups .
   • Grainger offers a variety of these boxes with legs, ensuring robust support and easy deployment in temporary environments .
3. Secondary Pedestals
   • Designed for utility and outdoor applications, these pedestals are built to withstand harsh environments.
   • They offer easy installation and maintenance, making them suitable for power utility management and decentralized distribution .
   • Hubbell's secondary pedestals are an example of durable, floor-standing solutions for above-ground power distribution .

Key Features

• Legs or pedestal base for floor stability and accessibility.
• Multiple circuit connections for distributing power efficiently.
• Durable construction to withstand environmental factors such as moisture, dust, and mechanical impact.
• Flexible installation options, including modular designs for easy expansion or reconfiguration.
• Compliance with standards such as IEC 61439 for safety and reliability .

Considerations for Selection

• Load capacity: Ensure the box can handle the total amperage of connected circuits.
• Environment: Choose IP-rated enclosures for outdoor or harsh conditions.
• Accessibility: Floor-standing boxes with legs allow easier access for maintenance and troubleshooting.
• Temporary vs. permanent use: Temporary boxes are lighter and portable, while permanent boxes are more robust and integrated into building infrastructure. In summary, a secondary distribution box with legs provides a versatile solution for both permanent and temporary power distribution, offering stability, accessibility, and protection for electrical circuits in a variety of settings .