TL;DR
Learn the specific NEC requirements for swimming pools, spas, and fountains including bonding and clearance rules. These specialty installations have strict safety requirements.
Free Working Space & Clearances (110.26) Practice Questions
Journeyman Electrician License Exam · NEC General & Definitions
This module covers Working Space & Clearances (110.26) as part of the NEC General & Definitions section, testing your understanding of core concepts and their practical application.
| Exam | Journeyman Electrician License Exam |
| Pass Rate | 55% |
| Duration | 240 minutes |
| Module | Working Space & Clearances (110.26) |
Why Working Space & Clearances (110.26) matters
Working Space & Clearances (110.26) is a commonly tested topic on the Journeyman Electrician License Exam because it covers fundamental knowledge required for competent professional practice.
Sample Practice Questions (5)
1. Per NEC 110.26(C)(2), a large equipment room has a single row of 480V switchgear rated 1600A that is 8 feet wide. What are the entrance requirements?
- Two entrances are required (one at each end), but a single entrance is permitted if the working space depth is doubled
- Only one entrance at least 24 inches wide is required regardless of equipment size
- Two entrances are required with no exceptions
- Three entrances are required for equipment over 6 feet wide
2. Per NEC 110.26(E)(1)(b), sprinkler protection piping runs above a panelboard within the dedicated equipment space. Is this installation permitted?
- Yes, provided protection is installed to prevent damage to the electrical equipment from condensation, leaks, or breaks in the piping
- No, absolutely no piping of any kind is permitted in the dedicated equipment space
- Yes, any piping is permitted above electrical equipment without restriction
- Only piping under 1 inch in diameter is permitted in the dedicated space
3. A 480V switchboard has exposed live parts on one side and unguarded exposed live parts on the opposite wall (Condition 3). Per Table 110.26(A)(1), what is the minimum clear working space depth?
- 5 feet (1.5 m)
- 4 feet (1.2 m)
- 4-1/2 feet (1.4 m)
- 6 feet (1.8 m)
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Start practicing free →4. Per NEC 110.26(E)(1)(a), what is the "dedicated equipment space" requirement for indoor panelboards and switchboards?
- The space equal to the width and depth of the equipment extending from the floor to 6 feet above the equipment or the structural ceiling (whichever is lower) shall be dedicated to the electrical installation
- A 3-foot clearance on all sides of the equipment
- The equipment must be in a separate locked room
- The dedicated space extends only 2 feet above the equipment
5. Per NEC 110.26(A)(1), what does "Condition 1" mean for determining working space depth?
- Exposed live parts on one side and no live or grounded parts on the other, or exposed live parts on both sides effectively guarded by insulating materials
- Exposed live parts on one side and a grounded surface on the other
- Exposed live parts on both sides of the working space with no guarding
- No exposed live parts on either side of the working space
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