Final 2A

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Overcurrent protection shall not exceed _____.

1) 15A for 14 AWG copper 2) 20A for 12 AWG copper 3) 30A for 10 AWG copper

The general requirements for overcurrent protection and overcurrent protective devices not more than 1,000V, nominal are provided in Article _____.

240

A circuit breaker having an interrupting current rating of other than _____ shall have its interrupting rating marked on the circuit breaker.

5,000 Amps

Each feeder disconnect rated 1,000A or more and installed on solidly grounded wye electrical systems of more than 150V to ground, but not exceeding _____ phase-to-phase, shall be provided with ground-fault protection of equipment in accordance with 230.95.

600 Volts

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

Above

Fuses shall be marked with their _____.

Amper and Voltage Rating, Interrupting rating where other than 10,000A, and Name or trademark of the manufacturer.

Where exposed to the weather, raceways enclosing service-entrance conductors shall be _____ for use in wet locations and arranged to drain.

Approved or Listed

Overhead feeder and/or branch-circuit conductors shall not be attached to a mast where the connection is _____ a weatherhead or the end of the conduit and a coupling where the coupling is located above the last point of securement to the building or other structure, or where the coupling is located above the building or other structure.

Between

Underground raceways entering a(an) _____ from outside shall be sealed.

Building or Structure

Section 210.52 provides rules for dwelling unit receptacle outlets. The receptacles required by this section shall be in addition to any receptacle that is located within _____.

Cabinets or Cupboards

To determine the feeder calculated load for ten 3 kW household cooking appliances, use _____ of Table 220.55.

Column A

Raceways entering from outside shall be sealed with a product identified for use with the _____ insulation.

Conductor or cable

Additional services shall be permitted for different voltages, frequencies, or phases, or for different uses, such as for _____.

Different Rate Schedules

A circuit breaker with a slash rating, such as 120/240V or 480Y/277V, shall be permitted to be applied in a solidly grounded circuit where the nominal voltage of any conductor to ground _____ the lower of the two values of the circuit breaker's voltage rating and the nominal voltage between any two conductors _____ the higher value of the circuit breaker's voltage rating.

Does Not Exceed

Where the lighting load for a nondwelling building is designed and constructed to comply with an energy code adopted by the local authority, the lighting load shall be permitted to be calculated using the unit values specified in the _____.

Energy Code

(T/F) In dwelling units, outdoor receptacles can be connected to one of the 20A small-appliance branch circuits.

False

(T/F) Molded-case circuit breakers are permitted to be reconditioned.

False

(T/F) The surge protective device (SPD) required for a dwelling unit shall be an integral part of the service equipment or be located immediately adjacent thereto and is not permitted to be located in the downstream panelboard.

False

GFCI protection shall be provided for all 15A and 20A, 125V, single-phase receptacles installed in a dwelling unit _____.

Garage and Laundry Area

The screw shell of a luminaire or lampholder shall be connected to the _____.

Grounded Conductor

Circuit breakers used to switch high-intensity discharge lighting circuits shall be listed and marked as _____.

HID

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

Identified

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

Largest Of

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

Listed and Rated

Raceways on exteriors of buildings or other structures shall be arranged to drain and shall be _____ for use in wet locations.

Listed or Approved

Only _____ circuit breakers shall be permitted to be reconditioned.

Low Voltage, Medium Voltage, and High Voltage

Each service disconnecting means shall be permanently _____ to identify it as a service disconnect.

Marked

Circuit breakers shall _____ all ungrounded conductors of the circuit both manually and automatically unless specifically permitted otherwise.

Open

Branch circuits shall be rated in accordance with the maximum permitted ampere rating of the _____.

Overcurrent Device

Vegetation such as trees shall not be used for support of _____.

Overhead conductor spans

Service conductors supplying a building or other structure shall not _____ of another building or other structure.

Pass through the Interior

Where a building has multiple feeders, a permanent _____ shall be installed at each feeder disconnect location denoting all other services and feeders and the area served by each.

Plaque or directory

The disconnecting means for a building supplied by a feeder shall be installed at a(an) _____ location.

Readily Accessible

Service-entrance cables which are not installed underground, where subject to physical damage, shall be protected by _____.

Rigid Metal Conduit, IMC, or Schedule 90 PVC

The identification of terminals to which a neutral conductor is to be connected shall be substantially white or _____ in color.

Silver

The requirement for maintaining a 3-foot vertical clearance from the edge of the roof shall not apply to the final feeder conductor span where the conductors are attached to _____.

The Side of a Building

(T/F) All services in dwelling units shall be provided with a surge protective device (SPD).

True

(T/F) Underground service-entrance conductors shall be protected against physical damage.

True

(T/F) Where a remote-control device actuates the service disconnecting means, the service disconnecting means shall still be at a readily accessible location either outside the building or structure, or nearest the point of entry of the service conductors.

True

(T/F) Where dwelling unit service equipment is replaced, a surge protective device (SPD) shall be installed.

True

Feeder conductors shall be permitted to be sized at 100 percent of the continuous and noncontinuous load where a portion of the feeder is connected at both its supply and load ends to separately installed pressure connections.

True

Outside branch circuits and feeders shall not be installed beneath openings through which materials may be moved and shall not be installed where they will obstruct entrance to these buildings' openings.

True

Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all _____ conductors at the point where the branch circuit originates.

Ungrounded

The white conductor within a cable can be used for a(an) _____ conductor where permanently reidentified to indicate its use as an ungrounded conductor at each location where the conductor is visible and accessible.

Ungrounded

The 3 VA per sq ft general lighting load for dwelling units does not include _____.

Unused or unfinished spaces not adaptable for future use

Receptacles shall have the terminal intended for connection to the grounded conductor identified by a metal or metal coating that is substantially white or silver in color or by the word "_____."

White

Where grounded conductors of different systems are installed in the same raceway, cable, or enclosure, each neutral conductor shall be identified to distinguish the systems by _____.

1) A continuous white or gray outer finish for one system 2) A neutral conductor with a different continuous white or gray outer finish or white or gray with a stripe for one system 3) Other identification allowed by 200.6(A) or (B) that distinguishes each system from other systems

Feeder and service loads for fixed electric space-heating loads shall be calculated at _____ percent of the total connected load.

100 %

Receptacle outlets are required for kitchen countertops and work surfaces _____ Inches and wider

12 Inches

The minimum feeder conductor ampacity shall be no less than the noncontinuous load plus _____ percent of the continuous load, and not less than the maximum load after the application of adjustment and correction factors.

125%

Overhead feeder conductors shall have a minimum vertical clearance of _____ ft over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage does not exceed 300 volts-to-ground.

12`

A building disconnecting means that supplies only limited loads of a single branch circuit shall have a rating of not less than _____.

15 Amps

If a set of 120/240V overhead feeder conductors terminates at a through-the-roof raceway or approved support, with not more than 6 ft of these conductors, 4 ft horizontally, passing over the roof overhang, the minimum clearance above the roof for these conductors is not less than _____.

18 In.

A receptacle outlet shall be installed at each dwelling unit kitchen wall countertop and work surface space that is 12 in. or wider and receptacle outlets shall be installed so that no point along the wall line is more than _____ inches, measured horizontally from a receptacle outlet in that space.

24 Inches

The feeder/service calculated load for a multifamily dwelling containing nine 12 kW ranges is _____.

24,000W

All outdoor outlets for dwellings, other than those covered in 210.8(A)(3), Ex to (3), that are supplied by single-phase branch circuits rated 150 volts-to-ground or less, _____, shall have ground-fault circuit- interrupter protection for personnel.

50A or less

Appliance receptacle outlets installed for a specific appliance in a dwelling unit, such as laundry equipment, shall be located within _____ of the intended location of the appliance.

6 Ft

Circuit breakers and switches containing fuses 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.

6 Ft 7 In.

If the circuit's overcurrent device exceeds _____, the conductor ampacity shall have a rating not less than the rating of the overcurrent device.

800 Amps

Supplementary overcurrent protection _____.

May be used to protect internal circuits of equipment

To prevent the entrance of _____, service-entrance conductors shall be connected to the service-drop or overhead service conductors either below the level of the service head or below the level of the termination of the service-entrance cable sheath.

Moisture

Where a portion of a feeder is connected at both its supply and load ends to separately installed pressure connections in accordance with 110.14(C)(2), it shall be permitted to have an allowable ampacity _____ the sum of the continuous load plus the noncontinuous load.

Not Less Than

A building or structure shall be supplied by a maximum of _____ service(s), unless specifically permitted otherwise.

One

A circuit breaker with a _____ rating, such as 120/240V or 277/480V can be used on a solidly grounded circuit where the nominal voltage of any conductor to ground does not exceed the lower of the two values, and the nominal voltage between any two conductors does not exceed the higher value.

Slash

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

Special Permission

(T/F) Feeder conductors shall be permitted to be sized at 100 percent of the continuous and noncontinuous load where a portion of the feeder is connected at both its supply and load ends to separately installed pressure connections.

True

(T/F) If the voltage between overhead service conductors does not exceed 300V and the roof area is guarded or isolated, a reduction in clearance to 3 ft is permitted.

True

(T/F) One set of service-entrance conductors connected to the supply side of the normal service disconnecting means shall be permitted to supply standby power systems, fire pump equipment, and fire and sprinkler alarms covered by 230.82(5).

True

(T/F) Single-pole breakers with identified handle ties can be used to protect each ungrounded conductor for line-to-line connected loads.

True

Where a premises wiring system contains feeders supplied from more than one nominal voltage system, each ungrounded conductor of a feeder shall be identified by phase or line and system by _____, or other approved means.

1) Color Coding 2) Marking Tape 3) Tagging

The next higher standard rating overcurrent device above the ampacity of the ungrounded conductors being protected shall be permitted to be used, provided the _____.

1) Conductors being protected are not part of a branch circuit supplying more than one receptacle for cord-and-plug-connected portable loads 2) Ampacity of the conductors does not correspond with the standard ampere rating of a fuse or circuit breaker 3) Next higher standard rating selected does not exceed 800A

Where a building is designed and constructed to comply with an energy code adopted by the local authority, the lighting load is permitted to be calculated using the unit values specified in the energy code if a _____.

1) Continuous power monitoring system is installed 2) Power monitoring system is installed with alarm values to alert personnel when the lighting load exceeds the energy code values and can provide to automatically reduce the connected load. 3) Continuous load multiplier of 125 percent is applied

In other than dwelling locations, GFCI protection is required for all single-phase receptacles rated 150V to ground or less, 50A or less and three-phase receptacles rated 150V to ground or less, 100A or less in _____.

1) Indoor damp and wet locations 2) Locker rooms with associated showering facilities 3) Garages, service bays, and similar areas other than vehicle exhibition halls and showrooms

For adjustable-trip circuit breakers, restricted access is defined as _____.

1) Located behind bolted equipment enclosure doors 2) located behind locked doors accessible only to qualified personnel 3) Password protected, with password accessible only to qualified personnel.

Overhead service conductors shall have a minimum vertical clearance of _____ ft from final grade over residential property and driveways, as well as over commercial areas not subject to truck traffic where the voltage does not exceed 300 volts-to-ground.

12

Conductors for feeders sized to prevent a voltage drop where the maximum total voltage drop on both feeders and branch circuits to the farthest outlet does not exceed _____ percent, will provide reasonable efficiency of operation.

5%

(T/F) Supplementary overcurrent devices used in luminaires or appliances are not required to be readily accessible.

True

(T/F) Where a mast is used for overhead branch-circuit or feeder conductor support, it shall have adequate strength or be supported by braces or guys to safely withstand the strain imposed by the conductors.

True

Overcurrent devices shall not be located _____.

1) Where exposed to Physical Damage 2) Near easily ignitible matericals, such as in clothes closets 3) In Bathrooms of Dwelling Units

Ground-fault protection of equipment shall be provided for solidly grounded wye electrical systems of more than 150 volts-to-ground, but not exceeding 1,000V phase-to-phase for each individual device used as a building or structure main disconnecting means rated _____ or more, unless specifically exempted.

1,000 Amps

Open individual conductors shall not be smaller than _____ AWG copper for spans up to 50 ft in length and _____ AWG copper for a longer span, unless supported by a messenger wire.

1. 10 2. 8

Feeder grounded conductors shall be permitted to be sized at _____ percent of the continuous and noncontinuous load where a portion of the feeder is connected at both its supply and load ends to separately installed pressure connections.

100 %

Feeder grounded conductors that are not connected to an overcurrent device shall be permitted to be sized at _____ percent of the continuous and noncontinuous load.

100 %

The minimum feeder load for show-window lighting is _____ VA per linear foot.

200 VA

Feeder equipment grounding conductors that are insulated or covered _____ AWG and larger, shall be permitted, at the time of installation, to be permanently identified as an equipment grounding conductor at each end and at every point where the conductor is accessible.

4 AWG

All single-phase receptacles rated 150V to ground or less, 50A or less and three-phase receptacles rated 150V to ground or less, 100A or less installed in other than dwelling unit garages, service bays, and similar areas shall be GFCI protected, unless located in _____.

Showrooms and vehicle exihibition halls

In dwelling units, when determining the spacing of receptacle outlets, _____ on exterior walls shall not be considered wall space.

Sliding Panels

Unless otherwise specified, for purposes of calculating branch-circuit and feeder loads, nominal system voltages of 120, 120/240, 208Y/120, 240, 347, 480Y/277, 480, 600Y/347, and 600 volts are to be used.

True

The minimum clearance for overhead service conductors not exceeding 600V that pass over commercial areas subject to truck traffic is _____ ft.

18 Feet

The minimum clearance for overhead feeder conductors not exceeding 1,000V that pass over commercial areas subject to truck traffic is _____ ft.

18 Ft.

A feeder or service supplying household electric ranges, wall-mounted ovens, counter-mounted cooking units, and electric dryers, where the maximum unbalanced load has been determined in accordance with Table 220.55 for ranges and Table 220.54 for dryers shall be permitted to have an additional demand factor of _____ percent applied.

70%

Where a method to reduce clearing time for fuses rated 1,200A or greater is required in accordance with 240.67(B), the _____ reduction system shall be performance tested when first installed on site.

Arc Energy

For equipment requiring servicing, GFCI protection shall be provided for the receptacles required by _____.

Article 210.63

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 point where the branch circuits originate


Kaugnay na mga set ng pag-aaral

AP Euro Period 3 (1815-1914), AP Euro period 3

View Set

Life Insurance Study Guide Part 2

View Set

AGAMA BAB 6 - Ibadah Haji dan Umrah

View Set

Exam II- Chapter 8: The Sensorimotor System

View Set

Servers3.1 - Implementing Hyper V & Virtual Networks

View Set

WEEK 11 ADN220 [THE CONCEPT OF FAMILY]

View Set

Chapter 7: Managing Stress and Emotions

View Set