The total clearance (space) in front of the electrical equipment shall be the addition of distance “X” and both the depths of “D1” and “D2”. If the equipment has no draw-out parts, no additional space shall
Underground equipment, pads and enclosures shall be located so that they meet or exceed the required clearances in each of the clearances sections and in each of their subsections.
Allow space for reasonable variations in the size of the equipment in case it needs to be replaced in the future. The 10-foot clearance is measured as the distance between the nearest point on the
They cover safe working distances for electrical work, including maintenance and operations and zero-voltage verification (ZVV). They apply to workers, supervisors, designers/engineers, and equipment
NEC 110.26 defines a three-dimensional zone around equipment that must be kept clear. This zone is determined by specific measurements for depth, width, and height. Let''s break down each
To determine this measurement, one must select the condition that applies to the installation. Then measure from exposed parts (soon to be live) or from the face of the enclosure, if
In single-row layouts, the clear distance between high-voltage switchgear and low-voltage panels should be no less than 2m. For overhead outgoing lines, the minimum height from the outdoor line bushing
The aisle (s) between pieces of such equipment, with live parts on both sides of the aisle, must be at least 4 feet wide. If the voltage exceeds 600, clearance must be increased even further.
Table 110.31 contains distance values for the required space between the equipment and the separating fence. Note that the fence cannot be within the working space measurements found in
If electrical equipment is being replaced, Condition 2 working space is permitted between dead-front switchboards, switchgear, panelboards, or motor control centers located across the aisle from each
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