Mandated Equipment Heights
The National Electrical Code generally does not provide minimum or maximum heights for equipment. However, one exception is circuit breakers and switches containing fuses. Additionally, the Code contains information about ADA standards for accessible designs, which addresses equipment heights and may be mandated by other codes and standards, but not by the NEC. Dedicated space for electrical installations is addressed in Section 110.26(E).
1. Annex J provides information about ADA standards for accessible designs and equipment heights.
Correct Answer: True
2. The space _____ feet above the width and depth of the equipment is generally dedicated to the electrical installation, and no piping, ducts or leak-protection apparatus foreign to the electrical installation is allowed in this space.
Correct Answer: 6
3. For equipment required to be accessible, such as a disconnect located adjacent to HVAC equipment, the use of a portable ladder to gain access is Code-compliant.
Correct Answer: True
4. A circuit breaker installed in a switchboard is generally required to be readily accessible, and the center grip of the operating handle must not be higher than 6 feet above the floor or working platform.
Correct Answer: False
5. The area above indoor electrical equipment’s dedicated space is permitted to contain foreign systems, provided protection is afforded to avoid damage from leaks or breaks.
Correct Answer: True
6. The dedicated space requirement for electrical equipment applies to all but which of the following:
Correct Answer: Junction and pull boxes
7. Concrete mounting or housekeeping pads and electrical equipment, such as wireways and junction or pull boxes, are permitted to be in the space (above and below equipment) if they are associated with the electrical installation and do not extend more than _____ beyond the front of the equipment.
Correct Answer: 6 inches
8. A junction box located above a suspended ceiling is considered to be which of the following:
Correct Answer: Accessible as applied to wiring methods
9. The top of a switchboard can be 8 feet, 6 inches above the floor if the center grip of the handle for the switches or circuit breakers in the switchboard is not higher than _____ above the floor or working platform.
Correct Answer: 6 feet, 7 inches
10. A single-pole snap switch installed for a lighting circuit is not permitted to be located higher than 6 feet, 7 inches above the floor in the room the lighting serves.
Correct Answer: False
Score: