NEC Master Exam Prep iOS App

NEC Master Exam Prep iOS App

Designed for electrical professionals, our app provides comprehensive resources to master the National Electrical Code (NEC)

Key Features for Your Success:

Extensive Question Bank: Engage with over 2,500 practice questions covering every section of the NEC Master Exam, fostering a deep understanding of the code.

In-Depth Explanations: Gain clarity with thorough explanations for each question, ensuring you comprehend the reasoning behind every answer.

Progress Analytics: Monitor your performance in real-time to identify strengths and target areas that need improvement.

Custom Test Creation: Bookmark challenging questions and create personalized practice tests using your collected questions, tailored to your specific needs.

Up-to-Date Content: Incorporates the latest 2023 NEC standards and updates, ensuring you study the most current and accurate material.

Download NEC Master Exam Prep today and take the next step towards becoming a master electrician!

Content Overview

Explore a variety of topics covered in the app.

General Requirements

Installation Requirements, Article 110.
Voltage Classifications, Article 110.
Tunnel Installations, Article 110.
Electrical Enclosures, Article 110.
Personnel Entry Rules, Article 110.
Inspection Procedures, Article 110.
Safety Guidelines, Article 110.
Compliance Standards, Article 110.

Wiring & Protection

Grounded Conductors ID, Article 200.
Branch Circuits >1000V, Article 235.
Feeder Systems Overview, Article 215.
Load Calculation Methods, Article 220.
Outside Branch Circuits, Article 225.
Service Installations, Article 230.
Overcurrent Protection, Article 240.
Overvoltage Protection, Article 242.
Grounding & Bonding, Article 250.
Wiring Methods Overview, Article 300.

Grounding and Bonding

Grounding Principles, Article 250.
System Grounding Methods, Article 250.
Grounding Electrode Systems, Article 250.
Enclosure Connections, Article 250.
Bonding Techniques, Article 250.
Equipment Grounding, Article 250.
Connection Methods, Article 250.
DC System Grounding, Article 250.
Meter Grounding, Article 250.
High-Voltage Grounding, Article 250.

Wiring Methods

General Wiring Methods, Article 300.
Wiring >1000V Systems, Article 300.
Conductors for Wiring, Article 310.
Enclosures & Boxes, Article 314.
Medium Voltage Cables, Article 315.
Armored & Flat Cables, Article 320.
Flexible Conduits, Article 348.
Nonmetallic Conduits, Article 352.
Busways Overview, Article 368.
Specialized Raceways, Article 386.

Equipment Use

Flexible Cords/Cables, Article 400.
Fixture Wiring Basics, Article 402.
Switch Types & Uses, Article 404.
Receptacles & Plugs, Article 406.
Switchboards Overview, Article 408.
Panelboards Basics, Article 408.
Industrial Control Panels, Article 409.
Luminaires Installation, Article 410.
Low-Voltage Lighting, Article 411.
Appliance Wiring, Article 422.

Special Occupancies

Hazardous Locations I-III, Article 500.
Intrinsically Safe Systems, Article 504.
Zone Locations 0-22, Article 505.
Commercial Garages, Article 511.
Cannabis Oil Systems, Article 512.
Aircraft Hangars, Article 513.
Fuel Dispensing Areas, Article 514.
Bulk Storage Plants, Article 515.
Spray & Coating Areas, Article 516.
Health Care Facilities, Article 517.

Health Care Facilities

General Electrical Needs, Article 517.
Wiring & Protection, Article 517.
Essential Electrical Systems, Article 517.
Anesthetizing Locations, Article 517.
Diagnostic Equipment, Article 517.
Data & Fire Alarms, Article 517.
Isolated Power Systems, Article 517.

Assembly Occupancies

Theaters & Studios, Article 520.
Stage Switchboards, Article 520.
Portable Stage Equip., Article 520.
Dressing & Makeup Areas, Article 520.
Amusement Controls, Article 522.
Carnivals & Fairs, Article 525.
Motion Picture Studios, Article 530.
Projection Rooms, Article 540.
Manufactured Buildings, Article 545.
Agricultural Installations, Article 547.

Recreational Structures

Recreational Vehicles, Article 551.
Mobile Home Parks, Article 550.
Park Trailers, Article 552.
Floating Structures, Article 553.
Temporary Installations, Article 590.
Electrified Truck Parks, Article 626.
Transport Refrigerated Units, Article 626.
Pool & Fountain Wiring, Article 680.
Swimming Pool Equip., Article 680.
Electric Pool Lifts, Article 680.

Special Equipment

Electric Signs/Lighting, Article 600.
Office Electricals, Article 605.
Elevators & Lifts, Article 620.
EV Power Transfer, Article 625.
Truck Parking Systems, Article 626.
Welding Equipment, Article 630.
Audio Systems, Article 640.
IT Equipment Wiring, Article 645.
X-Ray Equipment, Article 660.
Heating Systems, Article 424.

Special Systems

Emergency Systems, Article 700.
Standby Systems, Article 701.
Power Production Sources, Article 705.
Energy Storage Systems, Article 706.
Critical Power Systems, Article 708.
Stand-Alone Systems, Article 710.
Power-Limited Circuits, Article 725.
Fire Alarm Systems, Article 760.
Fiber Optic Cables, Article 770.
Communication Systems, Article 800.

Example questions

Let's look at some sample questions

What is the role of a partition, fence, or screen when installing equipment in rooms with high and low voltage?

To enhance the room's aesthetic appeal.To separate the high-voltage equipment from low-voltage equipment safely.To support the equipment structure.To serve as additional grounding for the equipment.
A partition, fence, or screen effectively separates high-voltage equipment from the space occupied by low-voltage equipment to improve safety.

What is the minimum load for each outlet for general-use receptacles not used for general illumination in all occupancies?

Based on nominal branch-circuit voltagesFixed at 100 volt-amperes per outlet1000 volt-amperes per outletNot less than 120 volt-amperes per outlet
According to Article 220.14, the minimum load for each outlet for general-use receptacles should be based on nominal branch-circuit voltages.

What specific information must an interrupter switch nameplate include?

Circuit type and color of conductorsManufacturer's name and locationType or designation, current rating, fault closing ratingRecommended installation date
The nameplate of an interrupter switch must include the manufacturer's type or designation, continuous current rating, interrupting current rating, fault closing rating, and maximum voltage rating.

In what circumstance is a supplemental electrode not required if a single rod, pipe, or plate electrode is used?

If the electrode is longer than 8 feetIf the electrode is driven at a 45-degree angleIf the electrode has a resistance to earth of 25 ohms or lessIf the electrode is galvanized
A supplemental electrode is not required if a single rod, pipe, or plate electrode has a resistance to earth of 25 ohms or less.

Under which article do the bending requirements for nonmetallic underground conduits fall?

Article 354.24Article 300.5Article 355.12Article 250.142
The bending requirements for nonmetallic underground conduits are specified in Article 354.24.

What minimum wire-bending space is required for noninsulated busbars?

100 mm150 mm200 mm250 mm
A minimum wire-bending space of 250 mm (10 inches) is required for noninsulated busbars.

Which type of optical fiber cable is installed in Class I, Division 1 hazardous locations and sealed according to specific regulations?

Type OFNPType OFCRType OFCGType OFN
Optical fiber cable Type OFNP must be installed and sealed in accordance with 501.15 for use in Class I, Division 1 locations.

What is the radius classification for booths where flammable gases or vapors are released while extracting plant oil?

Class II, Division 1 or Zone 1Class III onlyZone 2 or Class I, Division 3Class I, Division 1 and Zone 1
Booths where flammable gases or vapors are released in the process of extracting plant oil are classified as Class I, Division 1 and Zone 1 areas.

What protection method is allowed for cables accessible to the public at carnivals according to Article 525?

Buried undergroundCovered with conductive mattingGuarded by nonconductive matting secured to the surfaceLeft exposed if supervised
Flexible cords or cables should be covered with nonconductive matting secured to the surface to minimize tripping hazards.

What describes the role of the Microgrid Control System (MCS)?

Limits energy storage capacityCoordinates interaction among various power sourcesSolely manages the disconnection from primary sourcesRegulates temperature within the microgrid
The Microgrid Control System (MCS) coordinates interaction between multiple power sources of varying types, manufacturers, and technologies.