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Article 200-285 Part07

This comprehensive quiz contains 50 questions carefully selected from the National Electrical Code (NEC) Articles spanning 200 through 285. These articles cover a broad spectrum of vital topics related to electrical installations within this section of the code.

The questions in this quiz are chosen randomly to provide a thorough assessment of your knowledge across these essential NEC articles. While we strive for a diverse set of questions, some fundamental principles may be revisited in different contexts due to their relevance to multiple sections within this range. This approach ensures a robust evaluation of your understanding.

We encourage you to actively participate and provide feedback. If you identify any issues or have suggestions for improving the quiz questions, please report them. Your contributions are invaluable in helping us maintain the accuracy and effectiveness of these learning resources.

Consider the importance of easy access to GFCI protection for resetting and testing.

1 / 50

The GFCI protection required by 210.8(A), (B), (C), (D), and (E) shall be _____.

Consider the types of certifications or labels that indicate compliance with safety standards for electrical equipment.

2 / 50

The service disconnecting means rated 1,000V or less shall be marked to identify it as being suitable for use as service equipment and shall be __.

Think about the importance of tenant safety and accessibility to the overcurrent devices that protect their circuits.

3 / 50

As long as a qualified electrician has access to the overcurrent devices for the branch circuit, it does not matter if the commercial building’s tenant has access to them.

Think about the different ways lighting can be controlled for outdoor entrances with grade-level access.

4 / 50

In a dwelling unit, illumination for outdoor entrances that have grade-level access can be controlled by _______ control.

Consider how grounding practices are implemented in buildings without intersystem bonding to ensure proper electrical safety.

5 / 50

For buildings with a grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to the power service accessible means external to enclosures using the options identified in 250.94(A).

For devices rated over 800 amperes, the conductor ampacity must always match or exceed the rating of the overcurrent device.

6 / 50

Where the overcurrent device is rated over 800 amperes, the ampacity of the conductors it protects shall be equal to or greater than the rating of the overcurrent device.

Think about the standard interrupting rating that does not require special marking and when it must be labeled on the breaker.

7 / 50

Every breaker having an interrupting rating other than _____ is required to have its interrupting rating shown on the breaker.

Think about what aspects of grounded conductors and their identification are covered by NEC Article 200.

8 / 50

Article 200 provides the requirements for _______.

Remember that standard overcurrent devices are typically limited to 80% of their rating for continuous loads unless rated for 100%.

9 / 50

Unless the overcurrent device and the equipment that encloses it, such as a panelboard or enclosure, is rated at 100% of its rating, continuous loads are limited to not more than __% of the rating.

Think about what ensures that the hub is suitable for service-entrance applications and meets safety standards.

10 / 50

Where conduits are used as service masts, hubs shall be ______ for use with service-entrance equipment.

Consider the common element that service-entrance conductors must be protected from entering the raceway or equipment.

11 / 50

Service-entrance and overhead service conductors shall be arranged so that ____ will not enter the service raceway or equipment.

Think about how a fuse’s voltage rating must meet or exceed the system’s voltage to ensure safe operation.

12 / 50

If a fuse is rated 250 volts or greater, it is permitted to be used on a 208-volt system.

14 AWG conductors have a lower ampacity than 12 AWG conductors, and their overcurrent protection is typically limited to 15 amperes.

13 / 50

The maximum overcurrent protection provided for 14 AWG copper conductors is _______ amperes.

Think about the types of metal structures that can serve as effective grounding electrodes when they are in direct contact with the earth.

14 / 50

Metal in-ground support structures permitted as grounding electrodes include, but are not limited to, pilings, casings, and other structural metal.

Focus on the NEC article that governs overcurrent protection to ensure the safe operation of conductors and electrical systems.

15 / 50

NEC Article ___ sets forth the requirements for overcurrent protection of conductors and overcurrent devices.

Think about which conductor in a separately derived system is responsible for carrying unbalanced current.

16 / 50

Separately derived system generators shall have the _______ conductor sized not smaller than required to carry the maximum unbalanced current as determined by _______.

Think about the certifications and ratings necessary to ensure that electrical components meet safety and performance standards.

17 / 50

Individual meter socket enclosures shall not be considered service equipment but shall be __ for the voltage and ampacity of the service.

Think about the maximum height allowed for safe and easy access to electrical panels.

18 / 50

Panels containing fuses and circuit breakers shall be readily accessible and installed so the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than __ above the floor or working platform.

The overcurrent protection device should match or be lower than the conductor’s ampacity to ensure safety.

19 / 50

If a conductor’s maximum ampacity is 115 amperes, we can use a 125-ampere circuit breaker to protect that circuit as long as the current doesn’t exceed 115 amperes.

Consider the distinctions between requirements for utility-controlled equipment and those for general electrical installations.

20 / 50

Individual meter sockets supplied by and under the exclusive control of an electric utility shall not be required to be __ in accordance with 230.66.

Consider the essential equipment that allows each occupant to manage their electrical service independently.

21 / 50

In a multiple-occupancy building, each occupant shall have access to the occupant’s __________.

Consider the load that would have the greatest impact on the feeder’s capacity when noncoincident loads are unlikely to operate at the same time.

22 / 50

Where it is unlikely that two or more noncoincident loads will be in use simultaneously, only the ______ of the loads used at one time is required to be used in computing the total load to a feeder.

Consider the impact of intersystem bonding on grounding requirements for communication systems.

23 / 50

For community antenna television and radio distribution systems, where the building or structure served has an intersystem bonding termination established, 250.94(A) shall apply.

Think about the type of system where a bonding jumper connects grounded conductors and equipment grounding conductors.

24 / 50

The connection between the grounded circuit conductor and the supply-side bonding jumper or equipment grounding conductor, or both, at a _______ is called a “system bonding jumper.”

Consider the range of ampere ratings available for fuses used in various applications.

25 / 50

The standard ampere ratings for fuses include(s) __.

Think about the types of circuits that distribute power to outlets and devices within a building.

26 / 50

Article 210 provides the general requirements for ______.

Consider how the path of an appliance’s cord would typically navigate the space around a sink or bathtub.

27 / 50

For the application of GFCI protection for personnel, when determining distance from receptacles for sinks [210.8(A)(7) and 210.8(B)(5)] and bathtubs or shower stalls [210.8(A)(9)], the distance shall be measured as the _____ path the cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or passing through a door, doorway, or window.

Consider the common ampacity allowed for 12 AWG copper conductors.

28 / 50

The maximum overcurrent protection for 12 AWG copper conductors is _______ amperes.

Consider how both grounding and bonding are essential for the effectiveness of lightning protection systems.

29 / 50

NFPA 780, Standard for the Installation of Lightning Protection Systems, provides information on the installation of __ for lightning protection systems [250.4(A)(1)].

Consider the minimum number of fixed appliances required before applying a demand factor to reduce the total load.

30 / 50

When sizing a feeder for the fixed appliance loads in dwelling units, a demand factor of 75 percent of the total nameplate ratings can be applied if there are ______ or more appliances fastened in place on the same feeder.

Focus on the NEC article that deals with labeling and marking requirements for equipment to ensure safety and compliance in series-rated systems.

31 / 50

NEC __________ requires that the manufacturer of a series-rated panel must legibly mark the equipment.

Consider the purpose of disconnecting means and their relationship to overcurrent protection devices.

32 / 50

Where fuses are used as the service overcurrent device, the disconnecting means shall be located ahead of the load side of the fuses in accordance with 230.91.

Think about safety requirements in areas of a dwelling that may have a higher risk of electrical hazards.

33 / 50

GFCI protection shall be provided for all 15A and 20A, 125V single-phase receptacles in dwelling units’ unfinished portions or areas of basements not intended as habitable rooms.

Think about the requirements for grounding in systems that lack an intersystem bonding termination.

34 / 50

For community antenna television and radio distribution systems, where the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor can be connected to the power service accessible means external to enclosures using the options identified in 250.94(A) Ex.

Consider the importance of easy access to GFCI protection for resetting and testing.

35 / 50

The GFCI protection required by 210.8(A), (B), (C), (D), and (E) shall be _____.

Consider the point where all grounding connections should terminate to create an effective path for ground faults.

36 / 50

For grounded systems, normally noncurrent-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the _______ to establish an effective ground-fault current path.

Focus on the NEC article that deals with branch circuits, particularly those that share a neutral conductor, known as multiwire branch circuits.

37 / 50

NEC _______ contains the requirements for multiwire branch circuits.

Focus on the NEC list of standard ampere ratings for fuses and nonadjustable circuit breakers, ensuring you choose only those that are standard.

38 / 50

Select all the standard ampere ratings for fuses and nonadjustable circuit breakers.

Overcurrent protection devices must operate in such a way that they disconnect all conductors in the circuit simultaneously to maintain safe operation.

39 / 50

Overcurrent protection devices are also permitted in ground conductors if they open all conductors of the circuit at the same time.

Consider the maximum number of switches or breakers allowed to act as disconnects in a feeder-supplied building.

40 / 50

There shall be no more than ______ switches or circuit breakers to serve as the disconnecting means for a building supplied by a feeder.

Think about whether any coatings on contact surfaces could interfere with the grounding process.

41 / 50

________ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity.

Consider the type of fault currents that would cause significant damage if left unchecked, which a current-limiting device would need to mitigate.

42 / 50

To be classified as current limiting, a fuse or circuit breaker is subjected to _____ fault currents. The fuse or breaker must reduce the fault current flowing into the circuit to a value less than the fault current that would have flowed into the circuit had there been no fuse or breaker in the circuit.

Think about where the equipment grounding conductor needs to be placed for safety and compliance in non-metallic conduits.

43 / 50

Where equipment grounding is required for an installation of HDPE, a separate equipment grounding conductor shall be _________.

Think about the best location for a disconnecting means to ensure safety for multiple circuits.

44 / 50

Where two or more branch circuits supply devices or equipment on the same yoke or mounting strap, a means to disconnect simultaneously the ungrounded supply conductors shall be provided at the _____.

Consider which table in the NEC provides information on sizing conductors based on their type and application.

45 / 50

The grounded conductor brought to service equipment shall be routed with the phase conductors and shall not be smaller than specified in Table __ when the service-entrance conductors are 1,100 kcmil copper and smaller.

Think about how service-entrance equipment is typically positioned to ensure proper drainage and prevent water ingress.

46 / 50

Service heads on raceways or service-entrance cables and goosenecks in service-entrance cables shall be located __ the point of attachment, unless impracticable.

Think about the specific articles that deal with overcurrent protection and fault current ratings, which are generally covered outside of Article 210.

47 / 50

NEC 210 and 210.6 set forth requirements for interrupting rating and protection against fault current.

Think about who has the authority to approve exceptions for multiple services to a single building.

48 / 50

Additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by ______.

Consider how both grounding and bonding work together to ensure the safety and effectiveness of lightning protection systems.

49 / 50

NFPA 780, Standard for the Installation of Lightning Protection Systems, provides information on the installation of __ for lightning protection systems [250.4(B)(1)].

Remember that overcurrent protection is intended to match the ampacity of the conductor to prevent overheating or damage.

50 / 50

Overcurrent protection is sized according to the ampacity of a conductor.

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