2015 IRC Electrical Exam 1

Electrical Inspector

18

When used outside, aluminum or copper clad aluminum grounding conductors must not be installed within _____ inches of the earth.

80

A 30 ampere branch circuit must be permitted to Supply fix utilization equipment and the rating of anyone cord and plug connected utilization equipment must not exceed ______ percent of the branch circuit ampere rating.

The minimum circuit ampacity marked on the equipment

The ampacity of the conductors supplying multimotor and combination load equipment must not be less than ________.

NEC

The electrical part of the 2015 international residential code ( chapter 34 through 43 ) is based on the 2014 _____ by the national fire protection association.

240

The minimum total load in amperes must be the volt-ampere sum calculated above divided by ____ volts.

15

A circuit with the rating of 15 amperes requires a receptacle with what ampere rating ?

80

The rating of any one cord and plug connected utilization equipment must not exceed _______ percent of the branch circuit ampere rating.

A) NM B) SR C) UF

Answer is D) None of the above

Which wiring method is allowed to be embedded in Masonary ?

Not be permitted

Aluminum grounding electrode must ________.

0\.5

Outlet boxes that do not enclose devices or utilization equipment must have an internal depth of not less than ___ inch.

15, 20, 25 or 30

Branch circuit supplying two or more outlets for fixed electric space heating equipment must be rated ___ amperes.

65

What is the demand factor for 2 ranges with a KVA rating of 7 KVA ?

Either or both ends

Conduits or raceways must be sealed or plugged at ____ where moisture will enter and contact live parts.

100

The minimum ampacity of a service for a single family dwelling would be _____ amperes.

40

Ranges with a rating of 8.75 kVA or more must be supplied by a branch circuit having a minimum rating of _____ amperes.

Indoors and outdoors

Chapters. 34 through 43 covers the installation of electrical systems, equipment and components _______ that are within the scope of this code, including services, power, distribution systems, fixtures, appliances, devices, and appurtenances.

36

The dimension of the working space in the direction of access to panelboards and live parts likely to require examination, adjustment, servicing, or maintenance while energized must be not less than _____ inches in depth. Except as otherwise specified in the code.

50

The total rating of utilization equipment fastened in place, other than lighting fixtures, must not exceed _____ percent of the branch circuit ampere rating where lighting units, cord and plug connected utilization equipment not fastened in place, or both, are also supplied.

Grounding electrode

A Metallic component encased by at least 2 inches of concrete, located horizontally near the bottom or vertically and within that portion of a concrete foundation or footing that is in direct contact with the Earth, consisting of at least 20 feet of one or more bare or zinc galvanized or other electrically conductive coated steel reinforced bars or rods of not less than 1/2 inch in diameter, or consisting of at least 20 feet of bare copper conductor, not smaller than 4 AWG shall be a considered as a _______.

90

The work space in front of a panelboard must allow the equipment doors or hinged panels to open a minimum of _____ degrees.

8

A special pump in a home is rated at 40 ameres. The branch circuit feeding this pump has an overcurrent protection breaker that is rated at 40 amperes. What is the minimum equipment grounding conductor size for a copper clad aluminum ground wire ?

18

Receptacle outlets in floors must not be counted as part of the required number of receptacles outlets unless they are located within _____ inches of the wall.

A) when the attachment plug cap is inserted B) when the attachment plug cap is not inserted C) whether or not the attachment plug cap is inserted.

Answer is D) All of the above

Where installed outdoors in the wet location, 15 and 20 ampere, 125 and 250 volt receptacles must have an enclosure that is weatherproof _______.

230

What is the allowable ampacity of a 4/0 copper conductor with USE insulation in a service ?

12 AWG

A UF cable is supplying power to a detached garage. The total maximum load in the garage is 4500 Watts. What would be the minimum conductor size for copper conductors that could be used if the supply voltage to be supplied is for three wire 240 V Panel ?

Communications, utilities and electric utilities, 400

Chapters 34 through 43 do not cover the installations, including associated lighting, under the exclusive control of _______ or services over ______ amperes.

9

What is the maximum number of 14 AWG, type TW conductors allowed in FMC 1/2 inch trade size ?

Bathrooms

Service disconnecting means must not be installed in _____.

18, 12

Underground service conductors that are not encased in concrete and that are buried _____ __inches or more below grade must have their location identified by warning ribbon that is placed in the trench not less than__ ____ inches above the underground installation.

Excluding panelboards

All devices, ____ provided with terminals for the attachment of conductors and intended for connection to more than one side of the circuit must have terminals properly marked for identification, except where the terminal intended to be connected to the grounded conductor is clearly evident.

3 feet

Foyers that are not part of the hallway in accordance with section E3901.10 and that have an area that is greater than 60 ft.² shall have a receptacle(s) located in each wall space that is ____ or more in witdth and unbroken by doorways, floor-to-ceiling windows, and similar openings.

Lampholders only

Lampholders of the screw-shell type may be installed for use as ______.

Grounded

All metal boxes must be _____.

10,000

Equipment intended to interrupt current at fault levels must have a minimum interrupting rating of _______ amperes, and equipment intended to interrupt current at levels other than fault levels must have an interrupting rating at normal circuit voltage of not less current that must be interrupted.

15 amperes, 250 volts

Receptacles and cord connectors must be rated at not less than 15 amperes, 125 volts or ______ , and must not be a lampholder type.

6

What is the maximum number of 10 AWG, type TW conductors allowed in schedule 80 rigid PVC conduit 3/4 inch trade size ?

5000 VA

You are doing a load calculation for a single family dwelling. The name plate on the dryer to be installed in the home shows that this is a high-efficiency dryer that uses only 3500 VA peak power consumption. What value will you use during your calculations to allow for the dryer load ?

This complies with code if it is single receptacle of the grounding type and is protected by ground-fault circuit interrupters.

A swimming pool installation has a receptacle that provides power for water pump motors located 6 feet and from the inside walls of the pool.

1/4, 0.06

A plate electrode of iron or steel plates must be at least _____ inch in thickness and electrodes of non-Ferrous metal must be at least _____ inch in thickness.

6

Where conductors are to be spliced, terminated or connected to fixtures or devices, a minimum length of ______ inches of free conductor must be provided at each outlet, Junction, or switch point and the required length must be measured from the point in the box with a conductor emerges from its raceway or cable sheath.

Ground fault, circuit interrupter

All 125 volt, single phase, 15 and 20 ampere receptacles installed in bathrooms must have ______ protection for personnel.

20

To meet a 24 inch horizontal requirements of E3901.4.1, kitchen receptacle outlets must be located not more than _______Inches above the countertop.

Grounding electrode(s)

The equipment grounding conductor must be run with a supply conductors and connected to the building or structure disconnecting means and to the _______.

3

Open conductors and multiconductor cables without an overall outer jacket must have a clearance of not less than ______ feet from the sides of doors, porches, decks, stairs, ladders, fire, escapes, and balconies, and from the sides and bottom of windows that open.

2 ( in raceway only )

What is the minimum burial depth in inches for circuit for control of irrigation and landscape lighting limited to not more than 30 volts and install with type UF or in other identified cables or raceway in underground wiring in solid rock where covered by minimum of 2 inches concrete extending down to rock.

Ungrounded

Each appliance must be provided with a means to disconnect all _____ supplied conductors.

5

Switching devices must be located not less than _____ feet horizontally from the inside walls of pools, spas and hot tubs except where separated from the pool, spa or hot tub by a solid fence, wall, or other permanent barrier or the switches are listed for used within that specified distance.

12, 24

A receptacle outlet must be installed at each wall counter space ____ inches or wider. Receptacle outlets must be installed so that no point along the wall line is more than _____ Inches, measured horizontally from the receptacle outlet in the space. Exceptions ignored.

A) suitable bored B) granular or selected materials C) suitable sleeves

Answer D) any of the above answers

During backfill for underground wiring where necessary to prevent physical damage to the raceway or cable, protection must be provided in the form of ______.

6

Receptacles on the property, other than that directly related to the circulation and sanitation system, must be located in less than _____ feet from the inside walls of pools and outdoor spas and hot tubs.

Nonmetallic

_______ boxes must be used only with cabled wiring methods with entirely nonmetallic sheaths, flexible cords and nonmetallic raceways. Exceptions ignored.

Construction

Equipment not identified for outdoor use and equipment identified only for indoor use, such as dry locations, indoor use only damp locations, or enclosure type 1, 2, 5, 12, 12 K and/or 13, must be protected against permanent damage from the weather during ______.

Continuous color, other than white, gray or green

Insulation on the ungrounded conductors must be _____. Exceptions ignored.

Covered

A(n) ______ conductor, encased within material of composition or thickness that is not recognized by the code as electrical installation.

indoors

The ballast of a fluorescent luminaries installed _____ must have integral thermal protection.

Where practicable

Service-drop conductors passing over the roof must be securely supported and such supports must be independent of the building ______.

8

Where installed in raceways, conductors of size _____ AWG and larger must be stranded. Exceptions ignored.

Two

A minimum of ____ 20 ampere rated branch circuit must be provided to serve all wall and floor receptacle outlets located in the kitchen, exception ignored.

Electrical continuity

Nonconductive coatings, such as paint, lacquer, and enamel on equipment to be grounded, must be removed from threads and other contact surfaces to ensure _______ or the equipment must be connected by means of fittings design, so as to make such removal unnecessary.

50, 70

For circuits requiring arc-fault circuit – interrupter protection, the maximum length of the branch – circuit wiring from the branch – circuit overcurrent device to the first outlet must not exceed ____ feet for 14 AWG conductors, and ____ feet for 12 AWG conductors.