The following items are commonly found on commercial and industrial prints. Which item would least likely be found on a set of residential prints as well?

Which section of a set of commercial or industrial blueprints gives specific information about mounting a transformer on a column?

In which set of prints would you most likely find a machine wiring diagram?

A commercial or industrial drawing that shows conduit size, number of conductors, panel references, and how the feeders are run is called the ? .

If there is a conflict between the prints and the specifications, clarification should not be sought from the ? .

Specifications should be consulted ? the print reading process.

The specifications for a set of industrial prints contain information and important details

Which division of project specifications covers the electrical installations?

The schedule which lists details relating to circuits, breakers, and the main disconnect is the ? schedule.

Which print(s) in a set of residential blueprints will the electrical worker probably concentrate on for electrical information?

When using a time-current curve, typically the horizontal axis is the ? and the vertical axis ? .

An OCPD category typically permitted to protect control circuits, luminaires, and appliances but not permitted to be used as a substitute for the required branch-circuit overcurrent protective devices or in place of the required branch-circuit protection best describes ? overcurrent protection.

Motor circuit protectors (MCPs) are devices that have a(n) ? only and are intended for only short-circuit and ground- fault protection for motor branch circuits.

Current-limiting OPCDs provide superior fault current protection by reducing ? on conductors and equipment during short-circuit conditions

Which statement is false?

Which statement is false?

The voltage rating of a fuse or circuit breaker must be ? the system voltage rating to assure the overcurrent protective device can properly and safely interrupt arcing internal to the overcurrent device during an overcurrent interruption.

If a fault current exceeds the capability of the OCPD to interrupt, the OCPD may ? .

Three-hundred-volt cartridge fuses are permitted on single-phase line-to-neutral circuits supplied from 3-phase, 4-wire solidly grounded neutral source where the line-to-neutral voltage does not exceed ? .

Overcurrent protective devices used on motor circuits and transformer primary circuits must permit ? for a period of time without opening (nuisance trip

Which of the following best describes the definition of a tap conductor?

Box trade size 4x21/8 square has a volume of ______ in2:

How many #12 awg conductors can fit be installed in a box trade size 4x11/2 square if four #8 awg conductors are already installed:

The minimum distance between raceways entering the same enclosure where splices are made is ______ times the trade size of the largest raceway:

Single receptacles that provide shore power for boats must be rated not less than ____:

Any portion of electrical wiring that is below the surface of a class 1, division 1 or a class 1, division 2 location shall be sealed within ______ft of the point of emergence above grade.

A luminaire supported by a single conduit shall not exceed ______ inches any horizontal direction from the point of conduit entry:

The ampacity of the conductors from the Generator windings to the first distribution over-current protection device shall not be less than ______ of the nameplate current rating of the Generator:

NM cable run horizontally through the framing members is considered supported if secured within ______ of the termination:

____ 10 AWG THHN conductors are permitted in 3/4 in EMT:

Branch circuit conductors for information technology equipment must have an ampacity not less than _____ of the total load connected:

Which NEC article contains specific rules related to grounding and bonding requirements for electric signs and light-emitting diode (LED) sign illumination systems?

Portable cord-connected signs shall not be required to be connected to a branch circuit equipment grounding conductor where protected by a system of ? or its equivalent.

If a pole-mounted electric sign is connected to a ground rod electrode, this electrode is addressed by the NEC as a(n) ? grounding electrode.

Metal parts and equipment of signs and outline lighting systems must be bonded together and to the associated transformer or power-supply ? of the branch circuit or feeder supplying the sign or outline lighting system.

The NEC requires that the equipotential bonding required for swimming pools must be installed to reduce ? in the pool area as described in Article 680.

What is the maximum size grounding electrode conductor required for a solidly grounded DC photovoltaic system?

What is the largest size grounding electrode conductor required for a PV system that has a solidly grounded DC system?

Which NEC chapter provides grounding and bonding requirements for communications systems installed using fiber optic cables?

Where an intersystem bonding termination is not present for use at an existing building or structure, an IBT can be installed or the grounding for a communications system and equipment can be accomplished by connection to all but which of the following?

Which of the following is a termination device that provides a means for connecting bonding conductors for communications systems to the grounding electrode system?

The grounding electrode conductor or bonding conductor installed for a communications system must meet all but which of the following requirements?

Ground-fault circuit interrupters operate (open the circuit) when the current reaches a value of ? .

The requirements for ? have increased significantly over the years and resulted in reduced shock and electrocutions in the locations in which they are installed.

The maximum current setting for Service Disconnect GFPE is ? , and the maximum time delay for operation is ? for ground-fault currents equal to or greater than 3,000 amperes.

Which of the following requires ground fault protection of equipment (GFPE) systems to be performance tested when first installed on site?

Where GFPE is installed in service equipment as part of a new construction project, which of the following is not a requirement of the NEC?

The neutral conductor of a solidly grounded system greater than 1,000 volts generally has to be insulated unless a bare neutral conductor is in accordance with which of the following conditions?

Medium- and high-voltage cables above ? are generally required to be shielded and this shielding is usually in the form of either a conductive tape or stranded conductors.

The grounded conductor of a medium voltage 3-phase, 3-wire corner-ground system shall be sized not less than the ? .

Where installed in a single raceway or as overhead conductors, what NEC table must be used to establish the minimum size for the grounded conductor of an AC service?

Which NEC table requires the 121/2% rule for sizing purposes when the size of the largest ungrounded conductor exceeds 1,100 kcmil copper or 1,750 kcmil aluminum or copper-clad aluminum?

Connected to ground without inserting any resistor or impedance device best defines which of the following systems?

Where the system is 3-phase, 4-wire, wye-connected and the neutral conductor is used as a circuit conductor, the system is ? grounded.

If an electrical system is grounded, ? conductor(s) of the system is connected to the Earth.

A(n) ? is a system in which a grounding impedance, usually a resistor, limits the ground-fault current to a low value during a first phase-to-ground fault event.

A stand-alone generator is a separately derived system that is ? to be grounded when the system supplied by the generator is 120/240 volts, single-phase, 3-wire and the neutral is used as a circuit conductor.

Which of the following is not a separately derived system?

Where an ungrounded separately derived system (dry-type transformer) is installed, a(n) ? shall be installed from the source enclosure to the first system overcurrent device enclosure.

Where structural metal framing or metal water piping systems exist in the area served by a separately derived system are bonded to a separately derived system, each required bonding jumper shall be sized in accordance with ? .

Where a separately derived system source is installed outside a building or structure served by the system, a grounding electrode connection ? location to one or more electrodes in compliance with Section 250.50.

The ? installed for a separately derived system is required to remain within the enclosure where it originates.

Where the common grounding electrode conductor method is used for multiple separately derived systems, the grounding electrode conductor tap must connect to the system at the same location (enclosure) that the grounded conductor and ? is installed.

For a separately derived system, where a busbar is used for connections of the grounding electrode conductor taps to a common grounding electrode conductor, the busbar must be at least how long?

If the largest ungrounded conductor from a separately derived system is 750 kcmil copper, what is the minimum size required for the required grounding electrode conductor that is run to the structural metal building frame electrode?

Where the transfer equipment for a generator switches the ? supplied by the generator, the generator is a separately derived system that must be grounded in accordance with 250.30(A)

The requirements in Articles 500 through 506 amend or modify the general rules of the Code to ensure the integrity of electrical installations and to minimize the possibility of electrical equipment being a(n) ? in volatile or potentially explosive atmospheres.

Electrical continuity of non–current-carrying metal parts of equipment, raceways, and other enclosures in any hazardous (classified) location, ? , must be ensured by any of the bonding methods specified in 250.92(B)(2) through (B)(4), whether or not equipment grounding conductors of the wire type are installed.

Isolated grounding receptacles installed in patient care spaces outside a patient care vicinity shall be installed in accordance with all but which of the following?

The bonding conductor for an equipotential plane in an agricultural building must be connected to wire mesh or other conductive elements and shall be by pressure connectors or clamps made of which of the following material?

Any wiring method used to supply a pool pump motor for a permanently installed pool is required to contain a(n) ? equipment grounding conductor sized in accordance with 250.122 but not smaller than 12 AWG.

A(n) ? is a reactor used to reduce common-mode noise current generated by the rapid switching of a motor drive or a signaling device.

? are a common source of common-mode noise.

? is a type of electromagnetic interference induced on power or communication lines.

A drive isolation transformer is designed with additional ? to reduce power quality problems associated with nonlinear loads.

? the secondary of a drive isolation transformer reduces common-mode noise coupling from primary to secondary side of the transformer.

Autotransformer reduced-voltage motor starting reduces the applied motor voltage to ? of the line voltage when starting.

Autotransformer reduced-voltage motor starting can be used with ? three phase motor.

The load power for a buck-boost transformer that boosts the source by 30 V at a current of 50 A is ? kVA.

The polarity of the voltage that causes current to flow from H1 to H2 in the primary results in current flow from ? in the secondary.

Buck-boost transformer should not be used to create a 240V/120 V single-phase service fed by a 208Y/120 V 3-phase, 4-wire source. If this is done, two ? would exist on the same circuit.

NFPA 70E Chapter 1 applies ? to electrical safety in the workplace. Chapter 2 addresses safety-related ? requirements.

Incident energy is defined as the amount of thermal energy impressed on a surface, at a certain distance from the source, generated during an electrical arc event. Incident energy is typically expressed in ? .

Article ? covers electrical safety requirements for the practical safeguarding of employees while working with exposed stationary storage batteries that exceed 50 volts, nominal.

Energized work is generally prohibited. Such work is permitted under which of the following conditions? I. For energized electrical conductors and circuit parts that operate at less than 50 volts, where the capacity of the source and any overcurrent protection between the energy source and the worker are considered and it is determined that there will be no increased exposure to electrical burns or to explosion due to electric arcs. II. Where the employer can demonstrate that deenergizing introduces additional hazards or increased risk. III. Where the employer can demonstrate that the task to be performed is infeasible in a deenergized state due to equipment design or operational limitations. IV. Where the employer can demonstrate that the task would take longer to perform in a deenergized state.

Only ? persons shall be permitted to work on electrical conductors or circuit parts that have not been put into an electrically safe work condition.

All requirements of Article 130 shall apply whether an incident energy analysis is completed or if Table 130.7(C)(15)(a), Table 130.7(C)(15)(b), and Table 130.7(C)(15)(c) are used in lieu of an incident energy analysis.

Electrical equipment such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers that are in other than dwelling units, and that are likely to require examination, adjustment, servicing, or maintenance while energized, must generally be field marked with a label. Which of the following choices includes information that must be contained on the label where a label is required? I. The arc flash boundary II. The available incident energy and the corresponding working distance or the arc flash PPE category for the equipment III. The date the label was installed IV. The minimum arc rating of clothing V. The nominal system voltage VI. The site-specific level of PPE

An unqualified person is permitted to cross the restricted approach boundary under which of the following conditions?

For the purposes of using the arc flash PPE category method to select PPE, each different type of OCPD, whether MCCB, ICCB, LVPCB, or a current-limiting fuse, has a unique typical fault clearing time in the Informational Note to Table 130.7(C)(15)(a).

There are five different common overcurrent protection trip types that a circuit breaker may incorporate. Which type is intended under fault current conditions to open a circuit breaker as fast as it can? The exact speed depends on the design. This trip can be fixed or adjustable.

According to NFPA 70E in the Informational Note to Table130.7(C)(15)(a), the typical fault clearing time for molded case circuit breakers is ? .

When using the arc flash PPE category method (for AC), the fault clearing time has to be equal or less than the fault clearing time parameter value for the type of equipment to be worked on in Table 130.7(C)(15)(a).

If an OCPD has not been maintained or has been improperly maintained, it may take longer to clear an arcing fault current than its specified published clearing time. As a consequence, the actual arc flash incident ? .

Electrical maintenance is only about minimizing costly breakdowns and unplanned outages.