Practice Test Geeks(E2) E2 Commercial Electrical Inspector Practice Test
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Working Space and Clearances Flashcards

7 cards from real E2 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Working Space and Clearances flashcards as text

  1. What is the minimum working space depth for 277/480V equipment under Condition 3 per NEC 110.26(A)(1)?

    Answer: 5 feet

    Per NEC 110.26(A)(1) Table, voltages from 151V to 600V under Condition 3 require a minimum working space depth of 5 feet.

  2. NEC 110.26(E) requires that the entrance to working spaces about electrical equipment be kept clear of obstructions. What specific door requirement is noted for large installations?

    Answer: Doors must open in the direction of egress and be equipped with panic hardware

    NEC 110.26(C)(1) requires that personnel doors for rooms with large electrical equipment must open in the direction of egress and be equipped with panic bars or other listed hardware.

  3. Which condition in NEC 110.26(A)(1) applies when there are insulated live parts on both sides of the working space?

    Answer: Condition 1

    Condition 1 applies when exposed live parts on one side are insulated or when both sides have insulated or grounded surfaces, requiring the least working space depth.

  4. A 15kV switchgear lineup is 30 feet long and rated over 1200A. Per NEC 110.34(C), how many access points are required?

    Answer: At least two, one at each end of the switchgear lineup

    NEC 110.34(C) requires that rooms or enclosures with large high-voltage equipment have at least two entrances/exits located at opposite ends of the equipment.

  5. Under NEC 110.26(A)(3), what is permitted to be located in the working space in front of electrical equipment?

    Answer: Nothing — the working space must be kept completely clear

    NEC 110.26(A)(3) requires the working space to be clear of all obstructions at all times to allow safe access for operation and maintenance.

  6. What additional working space is required by NEC 110.26(A)(1) for equipment rated between 601V and 2500V under Condition 1?

    Answer: 4 feet

    NEC 110.34(A) Table requires a minimum working space depth of 4 feet for voltages up to 2.5kV under Condition 1.

  7. NEC 110.26(F)(1)(a) defines the dedicated equipment space for indoor electrical equipment. What is the width of this dedicated space?

    Answer: The width of the equipment only

    NEC 110.26(F)(1)(a) defines the dedicated electrical space as extending the full width of the equipment from the floor to the structural ceiling.