Of the following output characteristics, which is NOT required to be compatible to the output of a generator or other electric power production source operating in parallel with an electrical supply system?
What is the MINIMUM bending radius for a power and control tray cable with a metallic shielding?
The working space in front of fire or electrical equipment may be used to store
Surface nonmetallic raceways that have limited smoke-producing characteristics shall be
What is the MAXIMUM number of branch circuit conductors permitted in a recognized wiring method between luminaries connected together on a single phase 120/240 volt system?
In what location are disconnecting means NOT required for individual luminaries with fluorescent double ended lamps and ballasts?
The top of a 12 inch deep wall cabinet, installed in a room with electric space heating cables embedded in the ceiling, shall be below the ceiling no less than
Non-heating leads from fixed outdoor electric deicing and snow melting embedded resistance heating panels shall be permitted to be protected by
What is the MAXIMUM ac control voltage to ground for permanent amusement attractions?
The site-isolating device installed at the distribution point for agricultural buildings shall be
A MAXIMUM continuous load on an overcurrent device is limited to 90 percent of the device rating. If the protective device is rated 80A, what is the MAXIMUM continuous load permitted?
How many sets of 5-wire feeders sharing the same common neutral are allowed?
What type of receptacles are permitted on a 40-amp branch circuit with multiple receptacles?
The equipment grounding conductor inside an underground feeder and branch-circuit cable is
Which National Electrical Code article covers telephone, telegraph, outside wiring for fire and burglar alarm systems and similar central station systems?
At what distance from entering the building must the metal sheath of communication cable be grounded or interrupted?
Multiwire branch circuits supply only line to neutral loads EXCEPT where they supply only one utilization equipment or_________
In a dwelling unit garage, GFCI protection of 15 and 20 ampere receptacles are required for_________
Where a counter-mounted cooking unit is mounted in a corner, the space behind the unit is exempt from wall countertop receptacle spacing requirements when the measurement from the back of the unit to the corner of the wall is less than_________
When are conductors required to be protected?
What component permits voltage to be stepped up or down?
Where required, mitigating measures shall be implemented for the period that a system is impaired, only when acceptable to the
After installation, when shall a central station be checked for sensitivity?
What is a Tactile Notification Appliance?
Smoke detectors with control output functions shall be verified that the control capability shall remain operable even if the signaling line circuit is in alarm state or_________
What best describes the purpose of inspection, testing and maintenance of a fire alarm system?
One method of defining circuit integrity cable is by establishing a MINIMUM fire resistance rating of how many hours?
Which of the following methods is acceptable to show the location of the detector and the area protected on a remote alarm indicator?
A circuit that contains both series and parallel elements is known as
What is the permitted location rule for a supplementary visible notification appliance?
In new construction, luminaries installed within 1.5 meters (5 feet) of the edge of the water or over a pool, fountain, or similar body of water must be mounted a vertical distance above the maximum water level of no less than___________
In Class I Division 1 and 2 locations, flexible cords are
Without exceptions, Liquidtight Flexible Metal Conduit (LFMC) shall be securely fastened in place by approved means within how many inches of each box, cabinet, conduit body or other conduit termination?
Electrical metallic tubing is designed to protect and____________
Flexible metallic tubing is considered which of the following?
Electrical nonmetallic tubing is used for the installation of which of the following?
Cord connected luminaries installed in bathtub and shower areas shall NOT have any parts within a zone measured
When installing surface mount or recessed luminaries in a closet, the lamp must be completely___________
After installation, outlet boxes must be provided with a cover unless covered by means of a____________
Where a metal lampholder is connected to a flexible cord, the inlet shall be equipped with an insulated bushing that, if threaded, is NOT smaller than
Which of the following materials can NOT be used for antennas and their lead-in conductors?
Type CATVX cables less than how many inches in diameter are permitted to be installed in multi-family dwellings?
Class 1, Class 2 and Class 3 circuits should be identified at terminal and junction boxes because
Secondary protectors on circuits exposed to accidental contact with electrical light or power conductors operating at greater than 300 volts to ground are__________
Driven telecommunication primary protector ground rods to supplement intersystem ground connections should be separated from electrodes of other systems by at LEAST
Where a roof has a slope of NOT less than 100 mm (4 inches) in 300 mm (12 inches) above roof clearance of a communication cable of NOT less than what distance shall be permitted?
Class 1 circuit conductors in sizes of 18 American Wire Gauge and 16 American Wire Gauge should be installed as any type EXCEPT
For Radio and Television distribution equipment, a bonding device intended to provide a termination point for the grounding conductor should comply with all of the following conditions EXCEPT
All inside conductors associated with the interior installation of transmitting stations should be separated from conductors of any electric light, power or signaling circuits by at least___________
Where the MAXIMUM span between supports is more than 35 feet, all of the following materials are approved for use as antenna and lead-in conductors for receiving equipment EXCEPT
What is the purpose of the NEC (National Electrical Code), with regard to the hazards arising from the use of electricity, with regard to persons or property?
Where does this code not cover the installation of optical fiber cables and raceways, or conductors, equipment and raceways for electrical, signaling, and communications?
Because limiting the number of circuits on a single enclosure minimizes the effects from a ground fault or short circuit in one circuit, the NEC provides that the number or circuits and wires in a single enclosure be:
Conductors, based on the ______ °C temperature rating and ampacity as given in Table 310.60(C)(67) through Table 310.60(C)(86), may be terminated unless otherwise identified.
For equipment rated 1200 amperes or more and over 6 feet wide that contain overcurrent devices, there shall be one entrance to and egress from the required working space not less than ________ inches wide and ________ feet high at each end of the working space.
Unless they are under __________________, the entrance to any buildings, enclosures, rooms, or vaults with exposed conductors or live parts operating at over 600 volts nominal must be kept locked.
Access and ______ space shall be provided and maintained about all electric equipment to permit ready and safe operation and maintenance of such equipment.
In front of electric equipment, the working space width must be at least ______ in., or the width of the equipment, whichever is greater. Also, the working space must have space for doors or hinged panels to open ______ degrees or more.
A large single panel, frame, or assembly of panels on which are mounted on the face, back, or both, switches, overcurrent and other protective devices, buses, and usually instruments.
When an installation in concrete slabs or masonry or underground, in direct contact with the earth, is in a location that can be saturated with water or other liquids (vehicle washing areas, for example), or is exposed to weather in an unprotected location, that is known as a:
A system or circuit conductor that is intentionally grounded.
What is the definition of Continuous Duty?
For fixed outdoor electric deicing equipment, the ampacity of branch-circuit conductors and the rating or setting of overcurrent protective devices supplying the equipment shall be a minimum of ______ of the full-load current
For a one-family dwelling with a 200 ampere, 120/240-volt, single-phase main service panel, supplied with size 2/0 AWG THW copper ungrounded service-entrance conductors in rigid metal conduit (RMC), what is the minimum allowed size of bonding jumper for the service-entrance conduit?
When a metal well casing is used with a submersible pump, the pump equipment grounding conductor must be ____________ the well casing.
For a 5-hp, 3-phase, 208-volt motor with 20-ampere rated overload protection and branch-circuit, short-circuit and ground fault protection rated at 30 amperes, what is the minimum required size of grounding conductor?
How many times may a grounding electrode conductor be spliced, using a listed split-bolt connector?
What is the minimum size underground installed service-lateral conductors allowed by the NEC, aside from any exceptions?
When overhead spans of open conductors and open multiconductor cables pass over a roof, the vertical clearance must be at least ______ ft. above the surface. This clearance must be maintained for at least ______ ft. in all directions from the edge of the roof. Exceptions ignored.
For the servicing of air-conditioning, heating and refrigeration equipment, a 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet must be installed within ______ of the equipment, at an accessible location.
Other than for supplying ____________ outlets or extension to the area below the floor but not above it, Cellular Concrete Floor Raceways may not be used in commercial garages.
If a raceway containing power-limited, remote-control, and signaling circuits is where condensation is known to be a problem and is subjected to different temperatures, it is required for the raceway to be filled with a material to prevent the circulation of warm air to a colder section of the raceway, that is approved by the authority having jurisdiction. Explosion-Proof seals:
For supplying a fixed electric space heating unit with heating elements having a full-load current rating of 125 amperes and a blower motor with a full-load current rating of 2.5 amperes, what is the minimum size 75° C rated copper conductors required?
Where shall liquidtight flexible metallic conduit (LFMC) not be used?
What is the maximum distance between supports for standard trade size 2 in. right Schedule 40 polyvinyl chloride conduit (PVC)?
When RMC threadless connectors and couplings are used with conduit, they must be made tight, and when they are to be buried in concrete or masonry, they must be:
The maximum percent of FMC conduit interior total area the may be filled if more than 2 conductors are used in the tube is:
The tightest bend allowed by the NEC for Type NM cable is a radius of how many times the diameter of the cable?
A factory assembly of one or more insulated conductors with an integral or overall covering of nonmetallic material suitable for direct burial in the earth.
For an individual branch circuit in a flat conductor cable assembly, what is the maximum ampacity?
If a pole is over 8 ft. in height, a ____________ terminal must be accessible from a handhole.
What is required for a control transformer when a 240-volt wye-connected motor gets power from a converted single-phase source, and it is intended to connect a 120/240-volt transformer to control the motor on the load side of the converter?
What is the full-load running current rating of a 208-volt, 3-phase, 50 hp, squirrel-cage, continuous-duty, AC motor?
For a branch-circuit where lighting outlets or general-use receptacles are also supplied, what is the maximum percentage of the rating that may not be exceeded by a cord-and-attachment-plug connected room air-conditioner?
Of the following, which is not a requirement for marking on a transformer’s nameplate?
Which of the following is a requirement for electrically heated floors in bathrooms, kitchens, and in hydromassage bathtub locations?
Lighting systems for fountains, pools, spas, and similar locations must be installed __________ or more horizontally from the nearest water’s edge, unless Article 680 permits otherwise.
On portable generators manufactured before ____________, listed cord sets or adapters incorporating listed GFCI protection are allowed to be used to meet the GFCI requirement.
Temporary electric power and lighting installations for holiday decorative lighting and similar purposes is allowed for a maximum of:
Where the available short-circuit current for the battery bank on a PV system exceeds the interrupting or ____________ ratings of the equipment it supplies, a listed current-limiting overcurrent device must be installed.
Tap conductors on a common dc grounding electrode conductor of a PV system must be sized in compliance with 250.166. The connection between the common grounding electrode and the tap conductor must be such that the common grounding electrode conductor is:___________
Power-limited fire alarm cable must have a moisture-impervious metal sheath or be listed for the purpose if they are used in what kind of location?
What must be done with approved ratings, to maintain the fire-resistance rating, to openings around penetrations of raceways for communications and optical fiber cables through fire-resistant-rated ceilings, floors, partitions, and walls?
When are Class 1 circuit conductor and power-supply conductors are allowed to be in the same cable, enclosure, or raceway?
It is not required to list or mark community antenna television and radio system coaxial cables if the cable is not more than ______ from where the cable enters the building from the outside to where it is terminated at a grounding block.
During lightning events, limiting the length of the primary protector grounding conductors for communications circuits assists in reducing voltage between the buildings communications systems and:___________
What type of protection is needed for the grounding electrode conductor for an antenna if it is subject to physical damage?
What is the maximum cross-sectional value that conduit nipples under 24 inches long may be filled?
If more than 2 conductors are used in a tube of EMT conduit, total interior area that can be filled is no more than ________ percent.
Given the following information, what is the maximum approximate distance a single-phase, 240-volt, 42 ampere load can be located from a panelboard? * copper conductors – K = 12.9 * size 8 AWG THWN/THHN conductors are used * Limit voltage drop to 3%