NEC Chapter 1

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1/15 Questions

When the word conductor is used in the NEC and the type of conductor material is not specified, the NEC requirement is for ________________.
- Aluminum
- Copper
- Copper or aluminum
- Insulated

About This Quiz

This NEC Chapter 1 quiz assesses knowledge on key aspects of electrical installations, including conductor materials, workspace requirements, equipment labeling, and system identification. It ensures adherence to NEC standards, enhancing safety and compliance in electrical engineering.

2.

Electrical equipment shall be installed in a ____ and workmanlike manner
- Tidy
- Secure
- Neat
- None of the above
Correct Answer

A. Neat

Explanation

110.12

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1
3.

The minimum headroom working space about a switchboard in a commercial installation is _________ feet.
- 6 1/2 feet
- 8 feet
- 6 feet
- 10 feet
Correct Answer

A. 6 1/2 feet

Explanation

section: 110.26 (E)

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1
4.

Switchboards, panelboards, industrial control panels, meter socket enclosures and motor control center that are in the other than dwelling occupancies and are likely to require examination, adjustment, servicing, or maintenance while energized shall be ____ to warn qualified persons of potential electric arc flash hazards
- Field marked
- Painted red
- Locked
- Elevated from grade level
Correct Answer

A. Field marked

Explanation

110.15

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1
5.

On all four wire delta connected systems where the midpoint of one is grounded, the high leg shall be identified with the color___?
- Red
- Blue
- Yellow
- Orange
Correct Answer

A. Orange

Explanation

110.15

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1
6.

All listed or labeled equipment shall be installed and used in accordance with any __________ included in the listing or labeling.
- Standards
- Labeling
- Instructions
- None of the above
Correct Answer

A. Instructions

Explanation

section: 110.3(B)

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1
7.

Conductors and equipment required or permitted by this code shall be acceptable only if
- Listed
- Approved
- Labeled
- Suitable
Correct Answer

A. Approved

Explanation

110.2

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2
8.

Round access openings in manholes shall not be less than ____ inches in diameter.
- A. Twenty six
- B. thirty
- C. thirty six
- D. forty
Correct Answer

A. A. Twenty six

Explanation

110.75(A)

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9.

The with of the working space in front of the electric equipment shall be the width of the equipment or ___ inches, whichever is greater
- A. 48 inches
- B. thirty inches
- C. twenty four inches
- D. thirty six
Correct Answer

A. B. thirty inches

Explanation

110.26 (A)(2)

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10.

Where indoor electrical installations of electrical equipment rated at over 600V nominal are accessible to unqualified persons, the installation must be made with ___ equipment
- A. nonmetallic
- B. fire rated
- C. metal enclosed
- D. listed
Correct Answer

A. C. metal enclosed

Explanation

110.31(B)(1)

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11.

____ plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used to secure electrical equipment
- Metal
- Plastic
- Copper
- Wooden
Correct Answer

A. Wooden

Explanation

110.13 (A)

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2
12.

Equipment intended to interrupt current at fault levels shall have a (n) ______ sufficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment
- Nominal rating
- Interrupting rating
- Overcurrent device
- Internal capacity
Correct Answer

A. Interrupting rating

Explanation

110.9

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1
13.

Unused cable or raceway openings in boxes, auxiliary gutters, cabinets, cutout boxes, meter socket enclosures, equipment cases, or housing shall be effectively ____ to afford protection substantially equivalent to the wall of the equipment.
- Closed
- Blanked
- Covered
- Sealed
Correct Answer

A. Closed

Explanation

110.12 (A)

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1
14.

Unused current transformers associated with potentially energized circuits shall be __?
- A. short circuit
- B. removed
- C. tagged
- D. grounded
Correct Answer

A. A. short circuit

Explanation

110.23

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1
15.

Electrical connections in the form of wire connectors (nuts) or splicing installed on conductors for direct burial shall be ___ for such use
- Approved
- Labeled
- Marked
- Listed
Correct Answer

A. Listed

Explanation

110.14(B)

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1

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Current Version
Mar 21, 2023

Quiz Edited by
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Feb 10, 2011

Quiz Created by
Morozco8

Nec Chapter 1

When the word conductor is used in the NEC and the type of conductor material is not specified, the NEC requirement is for ________________.

Quiz Preview

Electrical equipment shall be installed in a ____ and workmanlike manner

The minimum headroom working space about a switchboard in a commercial installation is _________ feet.

On all four wire delta connected systems where the midpoint of one is grounded, the high leg shall be identified with the color___?

All listed or labeled equipment shall be installed and used in accordance with any __________ included in the listing or labeling.

Conductors and equipment required or permitted by this code shall be acceptable only if

Round access openings in manholes shall not be less than ____ inches in diameter.

The with of the working space in front of the electric equipment shall be the width of the equipment or ___ inches, whichever is greater

Where indoor electrical installations of electrical equipment rated at over 600V nominal are accessible to unqualified persons, the installation must be made with ___ equipment

____ plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used to secure electrical equipment

Equipment intended to interrupt current at fault levels shall have a (n) ______ sufficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment

Unused cable or raceway openings in boxes, auxiliary gutters, cabinets, cutout boxes, meter socket enclosures, equipment cases, or housing shall be effectively ____ to afford protection substantially equivalent to the wall of the equipment.

Unused current transformers associated with potentially energized circuits shall be __?

Electrical connections in the form of wire connectors (nuts) or splicing installed on conductors for direct burial shall be ___ for such use