Deck 9: General Nec Requirements for Rough-In Wiring

Question 1

Section 300.20(A) requires conductors carrying alternating current and installed in ferrous (iron) metal boxes to be arranged to avoid heating the surrounding metal by magnetic induction.

Answer 1

True

Question 2

The fixed glass section of a sliding glass door unit is counted as regular wall space when determining receptacle placement in a room.

Answer 2

True

Question 3

When holes are bored through wood framing members for the purpose of installing an electrical cable, the holes must be bored so the edge of the hole is not less than __________ from the nearest edge of the wood framing member.

A) 1 inch
B) 1-1/4 inches
C) 1-1/2 inches
D) 1-3/4 inches

Answer 3

B

Question 4

An electrician must cut a groove into a wood beam to install Type NM cable to a certain location.If the groove is cut into the beam 1-1/8 inches, a steel plate at least 1/16-inch thick is required to protect the cable.

Question 5

__________ heating will occur when current carrying conductors of the same circuit are brought through separate holes in a metal box or enclosure.

A) Invective
B) Inductive
C) Convective
D) Conductive

Question 6

Conductors used in residential wiring can be copper, aluminum, or copper-clad aluminum.

Question 7

Which of the following is not required to be marked on electrical conductors and cables?

A) Maximum rated voltage
B) Proper type letter or letters for the type of cable or conductor
C) AWG size or circular mills
D) The testing laboratory for the cable or conductor

Question 8

Type __________ cable should be used when running a cable underground to an outside pole light.

A) NM-B
B) NM-C
C) UF
D) NM

Question 9

A receptacle outlet controlled by a wall switch is permitted to serve as a lighting outlet in kitchens.

Question 10

Where the opening to an outlet, junction, or switch point box is less than 8 inches in any dimension, each conductor must be long enough to extend at least __________ outside the opening.

A) 3 inches
B) 6 inches
C) 8 inches
D) Far enough to complete the wiring

Question 11

A short piece of metal raceway is used to provide protection to a cable assembly.According to the NEC, this is permitted even though the metal raceway is not mechanically continuous.

Question 12

Where device boxes are installed in walls or ceilings with a noncombustible surface, the edge of the box must __________ the wall or ceiling surface.

A) not be set back farther than 1/8 inch from
B) not be set back farther than 1/4 inch from
C) not be set back farther than 1/2 inch from
D) be flush with

Question 13

Where nonmetallic sheathed cable is used with a single gang nonmetallic device box, the cable sheath must extend inside the box not less than __________.

A) 1/16 inch
B) 1/8 inch
C) 1/4 inch
D) 1/2 inch

Question 14

Boxes for floor receptacles must be specifically listed for that purpose and no other box type can be used in a floor installation.

Question 15

When device boxes are installed in walls or ceilings with a combustible surface such as wood, the edge of the boxes must __________ the finished surface.

A) not be set back farther than 1/8 inch from
B) not be set back farther than 1/4 inch from
C) nor be set back farther than 1/2 inch from
D) be flush with

Question 16

Sheetrock, a popular building material used to finish off walls and ceilings in residential and commercial construction, is also referred to as wallboard.

Question 17

Receptacles are not required on a wall directly behind a range, counter-mounted cooking unit, or sink unless there is more than 12 inches of space behind one of these items and the wall.

Question 18

Which of the following colors is not acceptable for an ungrounded conductor?

A) Brown
B) Yellow
C) Orange
D) Gray

Question 19

The NEC allows Class 2 control wiring to be supported by the raceway that supplies power to the piece of equipment (like a furnace) that the control wiring is associated with.

Question 20

An electrician discovers that a two-wire cable has been installed instead of a three-wire cable.To remedy the problem, the electrician installs an additional single insulated conductor along with the two-wire cable.This wiring method is acceptable according to the NEC.

Question 21

Receptacles must be placed to serve the countertop surfaces in a kitchen so that no more than __________ feet are between each receptacle.

A) 2
B) 3
C) 4
D) 6

Question 22

__________ are long thin strips of wood (or metal) used to make backing surfaces to support the finished surfaces like sheetrock in a room.

A) Furring strips
B) Knockout plugs
C) Deteriorating agents
D) Sill plates

Question 23

Receptacles that are installed to meet NEC Section 210.52 placement requirements are not permitted to be more than __________ feet above the floor.

A) 4.5
B) 5
C) 5.5
D) 6

Question 24

The __________ stage is when the raceways, cable, boxes, and other electrical equipment are installed.

A) planning and preparation
B) trim-out
C) troubleshooting
D) rough-in

Question 25

Where one or more lighting outlet(s) are installed for interior stairways, there must be a wall switch to control the lighting outlet(s) at each floor level and landing, where the stairway between floor levels has __________ risers or more.

A) 6
B) 10
C) 12
D) 15

Question 26

The required wall receptacle in each bathroom of a dwelling unit must be installed adjacent to, and within __________ of the outside edge of each basin.(General Rule)

A) 8 inches
B) 24 inches
C) 36 inches
D) 6 feet

Question 27

Boxes that are listed for ceiling suspended paddle fans are permitted to support fans that do not weigh more than __________ pounds.Boxes that can support more than 35 pounds must have the maximum weight marked on the box.

A) 35
B) 45
C) 50
D) 70

Question 28

A minimum of _________ communications outlet must be installed in all newly constructed dwelling units.

A) one
B) two
C) three
D) four

Question 29

Where cables and raceways are installed less than 1-1/4 inches from the edge of framing members, a metal plate at least ____________________ thick must be installed to protect the cables and raceways.(General Rule)

Question 30

Hallways of __________ or more in length must have at least one receptacle outlet.

A) 6 feet
B) 10 feet
C) 12 feet
D) 15 feet

Question 31

Individual wall spaces of __________ feet or more in width are considered usable for the location of a lamp or appliance, and a receptacle outlet is required.

A) 2
B) 4
C) 6
D) 12

Question 32

Lighting fixtures installed in a ceiling, weighing no more than __________, are permitted to be supported by outlet boxes.

A) 35 pounds
B) 45 pounds
C) 50 pounds
D) 75 pounds

Question 33

In kitchens, a receptacle outlet must be installed at each counter space that is __________ or wider.

A) 6-inch wide
B) 12-inch wide
C) 10-inch wide
D) 24-inch wide

Question 34

Receptacle outlets must be installed on or above, but not more than __________ above the kitchen countertop or work surface.

A) 6 inches
B) 12 inches
C) 20 inches
D) 24 inches

Question 35

An electrical box must be installed at each conductor splice point, outlet point, switch point, junction point, or termination point where the wiring method is conduit or cable.

Question 36

Device boxes can support a lighting fixture weighing no more than ________ pounds as long as the fixture is secured to the box with at least two 6-32 screws.

A) 2
B) 6
C) 10
D) 35

Question 37

In each attached garage, receptacle outlets must be located so that there is at least _____ receptacle outlet in each vehicle bay and not located more than _____ above the floor.

A) one, 5.5 feet
B) two, 6 feet
C) three, 3 feet
D) four, 5 feet

Question 38

Receptacles must be installed so that no point measured along the floor line in any wall space is more than __________ feet from a receptacle.

A) 3
B) 6
C) 10
D) 12

Question 39

A(n)_________ is an entranceway or transitional space from the exterior to the interior of a house.

A) porch
B) foyer
C) annex
D) closet

Question 40

At least one receptacle outlet must be installed at each peninsular counter space with a long dimension of __________ or greater and a short dimension of __________ or greater.

A) 12 inches, 24 inches
B) 12 inches, 48 inches
C) 48 inches, 24 inches
D) 24 inches, 12 inches

Question 41

The term used by electricians to describe the process of installing a residential electrical system is ____________________.

Question 42

Cables installed in or under metal-corrugated sheet roof decking are required to be installed and supported so there is not less than __________ measured from the lowest surface of the roof decking to the top of the cable or raceway.

Question 43

Explain when conductors smaller than 14 AWG copper are allowed to be used in residential wiring.

Question 44

At least ____________________ inches of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, must be left at each outlet, junction, or switch point for the connection of luminaires or devices.

Question 45

Explain the NEC requirements for outdoor receptacle placement at a one family dwelling.

Question 46

Where nonmetallic sheathed cable passes through factory or field punched holes in metal framing members, the cable must be protected by a(n) ____________________.

Question 47

Describe how a 4 AWG or larger wire is identified as a grounded conductor.

Question 48

The common piece of electrical equipment that electricians use to insert into any knockout opening that is open and not used is called a _________________________.

Question 49

When Type NM or Type UF cables are used, the outside sheathing of the cable must extend at least 1/4 inch (6 mm) inside the box and beyond any cable clamp.