TL;DR
Study the official NEC definitions in Article 100 that establish the precise meaning of electrical terms used throughout the code. Knowing these definitions is essential because exam questions rely on exact NEC terminology.
Free Definitions (Art. 100) Practice Questions
Journeyman Electrician License Exam · NEC General & Definitions
This module covers Definitions (Art. 100) 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 | Definitions (Art. 100) |
Why Definitions (Art. 100) matters
Definitions (Art. 100) 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 Article 100, which statement correctly distinguishes "service point" from "service drop"?
- The service point is the point of demarcation between the serving utility and the premises wiring; the service drop is the overhead conductors from the utility to the service point
- The service point is the meter base; the service drop is the underground lateral
- Service point and service drop are different names for the same connection
- The service drop is the demarcation point; the service point is the overhead conductor run
2. Per NEC Article 100, what is the correct definition of "overcurrent"?
- Any current in excess of the rated current of equipment or the ampacity of a conductor, which may result from overload, short circuit, or ground fault
- Current that exceeds the voltage rating of the conductor insulation
- Any current above 20 amperes in a residential branch circuit
- A transient current surge lasting less than one cycle caused by lightning
3. Per NEC Article 100, which of the following qualifies as a "separately derived system"?
- A transformer with no direct electrical connection (including a solidly connected grounded conductor) to supply conductors originating in another system
- Any subpanel fed from a feeder
- A subpanel in a detached garage connected with a 4-wire feeder where the neutral is bonded at both ends
- A standby generator connected through a transfer switch that maintains the neutral connection to the service
Want more practice like this?
Start practicing free →4. Per NEC Article 100, what does "listed" mean?
- Equipment included in a list published by a qualified testing laboratory (NRTL) that evaluates products to appropriate standards
- Equipment approved by the local building department
- Equipment included in the NEC codebook appendix tables
- Any product carrying a manufacturer's warranty
5. Per NEC Article 100, a "device" is best described as:
- A unit of an electrical system that carries or controls electric energy as its principal function but does not utilize it (e.g., switches, receptacles)
- Any piece of equipment connected to an electrical circuit
- Equipment that converts electrical energy to light or heat
- A component whose sole purpose is overcurrent protection
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