NCCER Introduction to the National Electrical Code (26105-20) Practice Test

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• What is the primary purpose of box fill calculations for a multi-gang box?
• What is the purpose of Article 410?
• What's often included to provide more detailed application requirements, such as for different wire sizes, box size, or motor types?
• Which informative annex contains the conduit fill tables for multiple conductors of the same size and type within the accepted raceways?
• Which NEC article governs branch circuits and their protection?
• Which annex would you consult for administration and enforcement of the NEC?
• Which annex contains the ADA requirements for accessible design?
• What is the purpose of Article 590?
• What is the general purpose of the NEC's color code?
• Which annex provides information on critical operations power systems?
• Which conditions trigger derating of conductor ampacity?
• What is the purpose of a service disconnect?
• Which color is typically used for neutral in residential wiring?
• Which statement best summarizes the NEC's overarching safety goal for practitioners?
• The NEC provides the minimum requirements for the installation of what?
• Which article would you reference to determine the ampacity rating of conductors?
• NEC chapter 5 covers special occupancy areas. These areas where sparks or heat generated by electrical equipment may cause an explosion or fire. Examples would include: commercial garages, aircraft hangars, and service stations.
• What is the purpose of GFCI in wet locations?
• Which NEC article covers motors and motor circuits?
• Which of the following is a grounding electrode?
• Which of the following is included as a topic in the NEC introduction article?
• Which organization, known for fire protection standards, is commonly associated with NFPA?
• What is the typical color code for a hot conductor on a single-phase 120V circuit?
• Which NEC topic addresses the safety of backup power systems during outages?
• In electrical distribution, what term describes a circuit that carries power from service equipment to distribution equipment or subpanels?
• By 1896 ___ (NELA) was working to make the requirements of the fire insurance organizations and electrical utilities fit together.
• Which class of hazardous areas is described as having ignitable fibers or dust in the air, not in quantities to form ignitable mixtures?
• In residential electrical installations, which color is used for equipment grounding conductors?
• AFCI protection is designed to protect against which type of electrical fault?
• Which article covers grounding and bonding requirements for electrical systems?
• NEC articles 501, 502, and 503 cover the installation of _______ wiring in hazardous (classified) locations. This system is designed to prevent the ignition of a surrounding explosive atmosphere when arcing occurs within the electrical system, and has three classes.
• What describes the main function of a panelboard in distributing power?
• In addition to different types of text, the NEC contains two types of rules: what are they?
• Which NEC chapter provides the requirements for various types of special equipment not covered in other chapters of the NEC?
• Which article would you consult for the general rules on receptacle protection and dwelling unit branch circuits?
• What is the role of the AHJ in electrical installations?
• Which article contains rules for electrical boxes and enclosures, including box fill calculations?
• What is the role of listed equipment in electrical installations?
• Which article is associated with definitions used throughout the NEC?
• How many main types of overcurrent protection devices are used in residential electrical systems?
• Informative annex G is described as informational and covers supervisory control and data acquisition (SCADA) systems. Which annex is this?
• A paint spray booth area would be classified as which class of hazardous location?
• NEC chapter 3 lists the rules on wiring methods and materials. The materials and procedures to use on a particular system depend on the type of building construction, type of occupancy, location of the wiring of the building, or in the area surrounding the building, and mechanical factors.
• Which annex contains suggested requirements for administration and enforcement of the NEC?
• Which NEC chapter is a special category for wiring associated with electronic communications systems including telephone, radio, and TV, satellite dish, network-powered broadband systems, and community antenna TV and radio distribution systems?
• What is the purpose of a box fill calculation for a single-gang box containing a duplex receptacle?
• Which statement best describes the relationship between ampacity and conductor insulation temperature rating?
• Which color is used for a grounding conductor in insulated residential wiring?
• ____ (NRTLs) are product safety certification laboratories. These labs perform extensive testing of new products to make sure they are built to establish standards for electrical and fire safety.
• Which annex contains the ADA requirements for accessible design?
• What is the purpose of box fill calculations?
• Which organization began publishing the NEC in 1962 after taking over from the National Board of Fire Underwriters?
• Which term describes equipment that has been evaluated and placed on a listing indicating compliance?
• Which NEC article governs nonmetallic-sheathed cable NM installations?
• Which NEC article covers grounding electrode systems?
• Which NEC article covers general requirements for electrical installations?
• What is the purpose of an equipment grounding conductor?
• How is the size of the service grounding electrode conductor determined?
• Which NEC article covers wiring methods such as cables, raceways, and conduits?
• Informative annexes A through J contain what kind of information?
• What is NM cable used for?
• In most dwellings, a kitchen requires at least how many 20-amp small-appliance branch circuits?
• In a multiwire circuit, which color is commonly used for an additional hot conductor?
• Which annex contains the ADA requirements for accessible design?
• Which informative annex contains the load calculation examples for branch circuits, feeders, and services, as well as load calculations?
• What voltage is typical for most residential circuits?
• Which amperage rating is required for kitchens' small-appliance branch circuits in most dwellings?
• In residential wiring, how are hot, neutral, and ground conductors typically color-coded?
• A multiwire branch circuit uses two or more ungrounded conductors sharing a neutral; what disconnection requirement applies?
• Headings for each NEC application are written in which formatting style?
• Which of the following is considered a grounding electrode?
• Which statement best describes a common content of Article 100?
• Which term refers to the marking indicating compliance with standards?
• Which NEC topic would govern safety for electrical installations in environments with flammable vapors?
• Why is conductor insulation temperature rating important for ampacity?
• Which informative annex contains information for determining ampacities of conductors under engineering supervision?
• Which annex contains the torque tables from UL 468A-B?
• Which NEC article covers receptacle spacing along walls in dwelling units?
• Which annex contains information on types of building construction?
• What does it mean if a component is listed in the NEC?
• Which statement best describes the role of a neutral in a panelboard?
• The National Board of Fire Underwriters is now known as which organization?
• Which of the following describes the typical voltage and amperage for general dwelling receptacles?
• What is the purpose of box fill calculations?
• Which statement correctly describes bonding and grounding?
• What is the typical voltage rating used for general use equipment?
• NEC chapter 2 discusses wiring design and protection; what is the chapter number?
• Which term refers to third-party certification for electrical equipment?
• What is the difference between a service disconnect and a branch-circuit disconnect?
• In a normal 120/240V system, which color is typically used for the neutral conductor?
• In a MWBC, what is required to safely disconnect simultaneously?
• Which NEC topic addresses the design and operation of systems that provide power during an outage?
• Which chapter contains tables that are applicable when referenced by other chapters in the NEC?
• Is NM-B cable permitted in damp or wet locations?
• In ____ the NFPA takes over publishing the NEC from NBFU.
• What term describes the italicized material that explains the circumstances under which a specific part of the NEC does not apply?
• Which topic addresses safety around pool and spa equipment within the NEC framework?
• What is the difference between 'grounding' and 'bonding'?
• Which NEC article provides the general requirements for electrical installations?
• Which annex contains the torque tables from UL 468A-B?
• Which NEC article addresses electric signs and outline lighting?
• What does NEC 110.3(B) require about listed equipment?
• Which article would you consult for switches and wall-mounted devices?
• How does the NEC address protection of conductors in studs and framing?
• What is the purpose of a pull box in a wiring run?
• In NEC terminology, which concept governs electrical installations in locations with potentially explosive or flammable atmospheres?
• Which NEC article governs conductors and their ampacity?
• Which NEC article provides definitions used throughout the NEC?
• The informative annexes are designated by which range of letters?
• What is the meaning of 'listed' versus 'labeled'?
• What does the term 'listed' imply about a product?
• Which factor determines the materials and procedures used for wiring according to NEC chapter 3?
• On a single-phase 120V circuit, which color is typically used for the hot conductor?
• Which NEC article provides the overall scope and general safety requirements for electrical installations?
• Which article governs temporary wiring provisions for construction sites?
• The objectives of NEMA include maintaining and improving the quality and reliability of products. Which two verbs complete this statement?
• What is the requirement for temporary wiring at construction sites?
• Which NEC article contains rules for electrical boxes and enclosures?
• NFPA 70 is commonly known as what?
• What is the difference between a switch and a receptacle?
• To be used for a specific application, equipment must be what?
• The disconnecting means in service equipment is intended to do what?
• Which annex is for informational purposes; it covers supervisory control and data acquisition (SCADA) systems?
• Which annex provides information on SCADA systems?
• Which informative annex contains examples of calculations for branch circuits, feeders, and services, as well as load calculations?
• Which article covers signs and outline lighting?
• What is the internet address used to submit input for the NEC?
• Which NEC article governs the installation of switches?
• Where is GFCI protection required in dwelling units?
• What is a receptacle outlet?
• The NEC's major category count is five. Which option represents that fact?
• Which statement best differentiates a feeder from a branch circuit?
• Which NEC article addresses branch circuits, receptacles, and their protection in dwelling units?
• Which statement about the NEC's structure is true?
• NEC article 400 covers the use and installation of flexible cords and cables, including the trade name, type letter, wire size, number of conductors, conductor installation, outer covering, and use of each type.
• Which NEC article covers electric signs and outline lighting?
• Which NEC table provides guidance on determining the size of the grounding electrode conductor?
• Which NEC topic covers the use and safety of storage batteries connected to the utility?
• Which type of conductor is typically used for grounding in most residential installations?
• How far apart must receptacles be located along wall spaces in dwelling units?
• Which annex contains information on building construction types?
• What is a grounding electrode system?
• What element may be included with explanations to show how an application might appear?
• This chapter covers various types of communications systems.
• Which condition ensures simultaneous disconnection of MWBC conductors?
• Which statement about listed components is true?
• What is the weatherproofing requirement for outdoor receptacles?
• What does SCCR stand for and why is it important?
• Which article provides the general safety requirements for electrical installations?
• Which NEC article covers overcurrent protection?
• What is the difference between a neutral conductor and an equipment grounding conductor?
• Which annex provides information on critical operations power systems?
• The main body of the NEC begins with which article number?
• ____ publishes a list of NRTLs.
• Which color is typically used for hot in residential wiring?
• What is the overarching objective of the NEC for practitioners?
• Informative annexes contain information that is not mandatory. Which of the following best describes this?
• Which topic is explicitly listed as being covered in the NEC introduction article?
• What are typical outdoor installation requirements for wiring and devices?
• Which annex would you consult to determine ampacities of conductors under engineering supervision?
• What color codes are used for neutral conductors in normal 120/240V circuits?
• What is the typical voltage and allowable amperage for general dwelling receptacles?
• Which article covers grounding connection locations and permissible grounding methods?
• Which NEC topic governs safety related to pool and spa equipment?
• Which statement about listing of electrical products is correct?
• What is the purpose of an informational note in the NEC?
• What is a junction box used for?
• What is the required working space in front of electrical equipment?
• Which NEC chapter is a special category for wiring associated with electronic communications systems?
• In box-fill calculations for a single-gang box containing a duplex receptacle, how many conductors does the device count as?
• In dwelling units, which NEC article requires AFCI protection for 120V branch circuits?
• What is a conductor and give two common examples?
• Which article covers emergency power and standby power systems?
• What is the minimum height above the finished floor for receptacles in dwelling units?
• What is a service conductor?
• What is AFCI protection and where is it required in dwelling units?
• What does NEC Article 100 define?
• Which NEC article covers luminaires and lighting outlets?
• Which NEC article provides the general requirements for electrical installations?
• The primary purpose of the NEC is to provide practical safeguarding of which of the following?
• What term explains something in an application, suggests other sections to read, or provides tips about the application?
• Which device is fixed to accept a plug-in appliance?
• In a multiwire branch circuit, what does a common-trip breaker ensure?
• ____ founded in 1926, is made up of companies that manufacture equipment used for generation, transmission, distribution, control, and utilization of electric power.
• The chapters that present the rules for the design and installation of electrical systems are which set?
• Which NEC topic covers the use and interconnection of storage batteries with the utility?
• What does AHJ stand for and what is its role?
• Which two organizations are cited as playing critical roles in worldwide electrical standards?
• The first nationally recommended electrical code was published by the ____ (now known as the American Insurance Association) in 1895.
• In dwelling units, receptacles not more than how many feet apart along the wall line?
• Which NEC chapter covers the installation of emergency and legally required standby systems?
• In dwelling units, which NEC article requires GFCI protection for certain outlets?
• Why should metal parts and enclosures be bonded?
• GFCI protection beyond standard indoor locations is required in which areas?
• Today, the NEC is administered by which organization?
• What is derating and when might it apply?
• Which of the following describes box fill calculations?
• The chapters that are concerned with special occupancies, equipment, and conditions are?
• What is a receptacle?
• Which NEC article discusses conductors and their ampacity?
• What is the function of the equipment grounding conductor?
• What is the typical rating for a standard residential branch circuit serving outlets?
• NELA stands for which association?
• NEC article 250 covers the requirements for grounding and bonding electrical systems. It lists the systems required, permitted and not permitted to be grounded and provides the requirements for grounding connection locations.
• What is the primary purpose of a grounding electrode system?
• In ____ the National Association of Fire Engineers met in Richmond, Virginia. From this meeting came the idea to draft the first National Electric Code.
• Which term describes equipment that has been tested and approved for a specific use?
• Which article covers outdoor lighting fixtures and installation safety?
• Which NEC article covers grounding and bonding?
• What is used to protect conductors from nails or screws when running through framing?
• What is SE cable and where is it typically used?
• Which annex is described as informational and pertains to SCADA systems?
• What is the purpose of arc-fault protection in dwelling units?
• How many chapters is the NEC organized into?
• In the NEC introduction article, which topic is listed as being covered?
• Which article governs wiring methods and installation of conductors through walls and ceilings?
• What is a branch circuit?
• How many major categories are the NEC chapters organized into?
• What color is the equipment grounding conductor?
• What is the difference between a receptacle and a plug-in device?
• Which article covers the use and installation of flexible cords and cables including the trade name, type letter, wire size, etc.?
• Which NEC article governs overcurrent protection?
• Which color is typically used to identify a neutral conductor?
• How must a multiwire branch circuit (MWBC) be protected?
• What is a feeder in electrical distribution?
• The definitions for labeled and listed emphasize attention to which two characteristics of materials used in electrical wiring systems?
• Two definitions from NEC Article 100 you should become familiar with are: ___ and ____.
• Class 1 areas containing flammable gases or vapors in the air may include paint spray booths and gas generator rooms. (NEC article 501)
• What is the purpose of a panelboard?
• Which article governs the installation of switches?
• NEC Article 100 contains a list of common what specific to a single article?
• Which informative annex contains a list of product safety standards?
• Which NEC chapter contains detailed tables along with explanatory notes, covering conduit bends, raceway fill, and conductor dimensions?
• Which chapter covers the installation of emergency and legally required standby systems?
• The NEC has a rich history, from its conceptual beginnings in the late ____ century.
• What is the purpose of a neutral bus in a panelboard?
• Which NEC article covers lighting fixtures and luminaires?
• Which NEC article covers wiring methods like NM cable and conduit?