Deck 18: Lighting Branch Circuit, Receptacle Circuits for Workshop

Question 1

What does NEC 406.5(C) prohibit?

Answer 1

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

Answer 2

B

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%

Answer 3

D

Question 4

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

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

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

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

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

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

Question 10

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

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

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

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

Question 14

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

Question 15

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

Question 16

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

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

Question 18

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

Question 19

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

A) are
B) are not

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

Question 21

A(n) ____________________ conductor carrying the unbalanced currents from the other conductors need not be counted when determining the ampacity of the conductor, according to NEC 310.15(B)(5)(a).