In general, 4 feet of doorway clearance is sufficient (based on the Uniform Building Code ). Figure 1 Building and Doorway Clearances (see Notes 2. Building Clearances (continued)Working space: The front clearance, side clearance, and height clearance requirements for electrical equipment that provide a safe area for maintenance, inspections, and other work. Mini Center Compact is a reliable range of distribution boards allowing maximum flexibility, offering wide choice of incomers: Switch. Here's a breakdown of the minimum space you need around common electrical enclosures: Front Clearance: You should have at least 36 inches (3 feet) of open space in front of equipment such as panelboards, switchboards, and transformers. This space allows technicians to stand and work comfortably. Power Distribution Equipment is a term generally used to describe any apparatus used for the generation, transmission, distribution, or control of electrical energy. This section concentrates upon commonly used power distribution equipment: Panelboards, Switchboards, Low-Voltage Motor Control. A distribution box, also known as a power distribution box or electrical distribution box, is used to distribute electrical power safely to multiple circuits.