Question 1

What does NEC 406.5(C) prohibit?

Accepted Answer

It prohibits mounting and supporting a receptacle to a cover by only one screw unless the device assembly or box cover is listed and identified for securing by a single screw.

Question 2

The branch circuit feeding the required laundry receptacle ____ permitted to supply other dedicated equipment in the laundry room, including lighting and an exhaust fan.
A) is
B) is not

Accepted Answer

According to NEC 210.11(C)(2), the branch circuit feeding the required laundry receptacle shall not supply other outlets or equipment. Therefore, it is not permitted to supply other dedicated equipment in the laundry room, including lighting and an exhaust fan.

Question 3

The NEC fill calculations for a conduit nipple not over 24 in. (600 mm) allows what fill percentage for three or more conductors?
A) 31%
B) 40%
C) 53%
D) 60%

Accepted Answer

The NEC allows a 60% fill percentage for conduit nipples not over 24 inches in length when they contain three or more conductors.

Question 4

What Code section makes it mandatory to install at least one receptacle outlet in each unfinished basement area?

Accepted Answer

The answer of What Code section makes it mandatory to...

Question 5

The derating factor that must be used when four to six current-carrying conductors are installed in a conduit is ____ percent.
A) 50
B) 70
C) 80
D) none of the above

Accepted Answer

According to NEC Table 310.15(B)(2)(a), when four to six current-carrying conductors are installed in a conduit, the derating factor is 80%.

Question 6

When a nonmetallic wiring method is installed where short sections of metal raceway are provided for mechanical protection-or for appearance-these short sections of raceway ____ be grounded.
A) need not
B) need to

Accepted Answer

Short sections of metal raceway used for mechanical protection or appearance in a nonmetallic wiring method do not need to be grounded according to the National Electrical Code (NEC) guidelines.

Question 7

In many parts of the country, the wiring method in unfinished basements is ____ in the ceiling and EMT on the walls for receptacles and switches.
A) metallic-sheathed cable
B) nonmetallic cable
C) nonmetallic-sheathed cable
D) armored cable

Accepted Answer

Nonmetallic-sheathed cable, also known as Romex, is commonly used for wiring in unfinished basements. It is typically run along the ceiling for lighting fixtures and along the walls for receptacles and switches. Armored cable (choice D) may also be used in some areas, but it is less common than Romex. Metallic-sheathed cable (choice A) and nonmetallic cable (choice B) are not commonly used in unfinished basements due to potential moisture issues.

Question 8

The NEC requires that all 125-volt, ____, 15- or 20-ampere receptacles installed in unfinished basements must be GFCI protected.
A) two-phase
B) multi-wire
C) single-phase
D) ungrounded

Accepted Answer

The NEC requires that all 125-volt, single-phase, 15- or 20-ampere receptacles installed in unfinished basements must be GFCI protected.

Question 9

When a single receptacle of any rating is installed on an individual branch circuit, the receptacle rating must not be ____ than the rating of the branch circuit.
A) more
B) less

Accepted Answer

The receptacle rating must not be less than the rating of the branch circuit to avoid overloading the circuit and creating a fire hazard.

Question 10

When metal raceways are used in house construction, in most cases the type of raceway will be ____________________.

Accepted Answer

The answer of When metal raceways are used in house...

Question 11

The advantage(s) of pull-chain switches for lighting fixtures include ____.
A) local control of task lighting
B) energy conservation
C) increased safety from wall switches
D) both a and b

Accepted Answer

Pull-chain switches allow for local control of task lighting, which can be more energy efficient than turning on all the lights in a room. This also provides a level of safety as the switch is located directly on the fixture, reducing the risk of someone accidentally turning off the wrong switch or tripping over cords.

Question 12

Some additional rules apply when nonmetallic-sheathed cable and armored cable are ____, because of possible physical damage to the cables.
A) run exposed
B) present
C) run unexposed
D) connected

Accepted Answer

When nonmetallic-sheathed cable and armored cable are run exposed, additional rules apply to protect the cables from possible physical damage.

Question 13

The circuit feeding the required laundry area receptacle(s) shall have ____ outlets connected to it.
A) no other
B) no more than one other
C) only one other
D) an unlimited number of

Accepted Answer

The circuit feeding the required laundry area receptacle(s) must have no other outlets connected to it, ensuring dedicated power for laundry equipment without interference or overload from other devices.

Question 14

Many electrical ordinances require that a separate equipment grounding conductor be installed in all raceways, whether rigid or flexible, whether ____________________.

Accepted Answer

The answer of Many electrical ordinances require that a separate...

Question 15

All 125-volt, single-phase, 15 or 20-ampere receptacles installed in ____________________ basements must be GFCI protected.

Accepted Answer

The answer of All 125-volt, single-phase, 15 or 20-ampere receptacles...

Question 16

For the typical ____________________, the duplex receptacle would be fastened to it by two small No. 6-32 bolts and nuts.

Accepted Answer

The answer of For the typical ____________________, the duplex receptacle...

Question 17

To ensure that the conductor insulation will not be injured, be sure to ream the cut ends of rigid conduit and electrical metallic tubing to remove ____.
A) rough edges
B) loose ends
C) burrs
D) both a and c

Accepted Answer

Reaming the cut ends of rigid conduit and electrical metallic tubing removes both rough edges and burrs, ensuring that the conductor insulation will not be injured during installation.

Question 18

When transitions between cable and conduit must be made, usually this will be a(n) ____________________.

Accepted Answer

The answer of When transitions between cable and conduit must...

Question 19

Raceways ____ required be installed as a complete system between pull points before pulling in the wires.
A) are
B) are not

Accepted Answer

Raceways are required to be installed as a complete system before wires can be pulled in. This ensures that the raceway system is properly installed and suitable for the intended use, and helps prevent damage to the wires during installation.

Question 20

Many workshop fluorescent luminaires are furnished with a 3-wire (____) flexible cord suitable for the purpose that has the attachment plug cap factory-attached to the cord.
A) black, white, green
B) black, white, orange
C) black, red, green
D) grey, white, green

Accepted Answer

The most common colors for 3-wire cords are black, white, and green, where black is the hot wire, white is the neutral wire, and green is the ground wire. This is consistent with the wiring used in workshop fluorescent luminaires. Option B is not correct as orange is not a common color for electrical wiring. Option C is not correct as red is not typically used for wiring in this context. Option D is not correct as gray is not a common color for electrical wiring.

Quiz 18: Lighting Branch Circuit, Receptacle Circuits for Workshop

What does NEC 406.5(C) prohibit?

The branch circuit feeding the required laundry receptacle ____ permitted to supply other dedicated equipment in the laundry room, including lighting and an exhaust fan.

The NEC fill calculations for a conduit nipple not over 24 in. (600 mm) allows what fill percentage for three or more conductors?

What Code section makes it mandatory to install at least one receptacle outlet in each unfinished basement area?

The derating factor that must be used when four to six current-carrying conductors are installed in a conduit is ____ percent.

When a nonmetallic wiring method is installed where short sections of metal raceway are provided for mechanical protection-or for appearance-these short sections of raceway ____ be grounded.

In many parts of the country, the wiring method in unfinished basements is ____ in the ceiling and EMT on the walls for receptacles and switches.

The NEC requires that all 125-volt, ____, 15- or 20-ampere receptacles installed in unfinished basements must be GFCI protected.

When a single receptacle of any rating is installed on an individual branch circuit, the receptacle rating must not be ____ than the rating of the branch circuit.

When metal raceways are used in house construction, in most cases the type of raceway will be ____________________.

The advantage(s) of pull-chain switches for lighting fixtures include ____.

Some additional rules apply when nonmetallic-sheathed cable and armored cable are ____, because of possible physical damage to the cables.

The circuit feeding the required laundry area receptacle(s) shall have ____ outlets connected to it.

Many electrical ordinances require that a separate equipment grounding conductor be installed in all raceways, whether rigid or flexible, whether ____________________.

All 125-volt, single-phase, 15 or 20-ampere receptacles installed in ____________________ basements must be GFCI protected.

For the typical ____________________, the duplex receptacle would be fastened to it by two small No. 6-32 bolts and nuts.

To ensure that the conductor insulation will not be injured, be sure to ream the cut ends of rigid conduit and electrical metallic tubing to remove ____.

When transitions between cable and conduit must be made, usually this will be a(n) ____________________.

Raceways ____ required be installed as a complete system between pull points before pulling in the wires.

Many workshop fluorescent luminaires are furnished with a 3-wire (____) flexible cord suitable for the purpose that has the attachment plug cap factory-attached to the cord.