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Friday, January 7, 2022
Question:
NEC Staff,
I have a switchgear lineup that is 96 inches tall. What is the minimum height requirement in front of this equipment. Some say the minimum is 6 ft. 7 inches. There is ductwork installed at 7 feet 6 inches in front of the equipment but not within the required working space. What is your opinion?
Bernie Simms
A
Answer:
Hi Bernie,
Section 110.26(A)(3) addresses the minimum height and indicates that the work space shall be clear and extend from the grade, floor, or platform to a minimum height of 6 feet 6 inches or the height of the equipment, whichever is greater. Based on the question, a minimum of 96 inches height is required in front of the equipment. Also, within the height requirements of this section, other equipment or support structures, such as concrete pads, associated with the electrical installation and located above or below the electrical equipment shall be permitted to extend not more than 6 inches beyond the front of the electrical equipment.