Deck 15: Special Residential Wiring Situations

Question 1

A detached garage supplied with electrical power must always have at least one 125-volt, 15- or 20-amp receptacle and at least one wall switch-controlled lighting outlet.

Answer 1

True

Question 2

Incandescent lamps used for lighting in a garage can be replaced with compact fluorescent (CFL) lamps or LED lamps.

Answer 2

True

Question 3

Good wiring practices require electricians to install at least __________ lighting outlets in a two-car garage to provide adequate lighting.

A) 1
B) 2
C) 3
D) 4

Answer 3

C

Question 4

All 15- and 20-amp, 125- and 250-volt non-locking receptacles used outdoors must be listed as weather-resistant.

Question 5

An overhead garage door is not considered an entrance or exit by the NEC and therefore does not require a lighting outlet(s) to be installed over or next to it.

Question 6

According to the NEC, which of the following 125 volt, 15 or 20 amp duplex receptacles installed in a garage to serve cord-and-plug appliances such as a refrigerator or freezer, requires GFCI protection?

A) Duplex receptacles located beside the appliance
B) Duplex receptacles located behind the appliance
C) Duplex receptacles located on the wall and just above the appliance
D) All of the above

Question 7

When used as an interior wiring method, Type UF cable must be installed according to the same rules as Type NM cable.

Question 8

Section 210.17 requires any outlet that is installed in a garage for the purpose of charging an electric vehicle to be supplied by a separate branch circuit and the branch circuit cannot have any other outlets on it.

Question 9

PVC conduit is not permitted as the only means of support for a junction box used with underwater lighting when wiring permanently installed swimming pools.

Question 10

If two ground rods are installed at a detached garage they must be located at least 12 feet (1.8 m) apart.

Question 11

Overhead conductor spans are permitted to be supported by trees.

Question 12

Section 210.52(G)(1) requires that at least two receptacle outlets be installed for each car space in a garage.

Question 13

In attached garages, the NEC requires at least __________.

A) one single 125-volt receptacle
B) one duplex 125-volt receptacle
C) one wall switch-controlled lighting outlet
D) one 125-volt, 15 or 20 amp receptacle and one wall switch-controlled lighting outlet

Question 14

If the feeder supplying power to a detached garage is installed with an equipment grounding conductor, the NEC does not require a separate grounding electrode system to be established at the detached garage.

Question 15

Any 15 or 20 amp, 125 through 250 volt receptacle installed in a wet location must have a cover or enclosure that keeps it weatherproof, but only when there isn't anything plugged into it.

Question 16

If you are required to install wiring for a storage shed or other accessory building, install the wiring the same as for a detached garage.

Question 17

The maximum distance between receptacles in a garage is __________ feet.

A) 4
B) 6
C) 12
D) there is no NEC requirement

Question 18

A GFCI receptacle is an acceptable means to provide the required GFCI protection to a hydromassage bathtub.

Question 19

When running branch circuit wiring in a raceway from an electrical panel inside the house to pool associated motors, an insulated equipment grounding conductor __________.

A) must be run
B) may be run
C) shall not be run
D) depends if the raceway is metallic or nonmetallic

Question 20

Outdoor lighting can be mounted on trees.

Question 21

The NEC requires that if a feeder supplying a detached garage from the service in the main house has an equipment grounding conductor run with the feeder, the grounded conductor __________ be connected to the equipment grounding conductor or to the grounding electrode system in the garage.

A) may
B) shall
C) shall not
D) could

Question 22

A permanently installed swimming pool must have at least one 125-volt, 15- or 20-amp receptacle located a minimum of __________ feet from the inside wall of the pool.

A) 3
B) 5
C) 6
D) 10

Question 23

Type UF cable can be used outdoors in direct exposure to the sun only if __________.

A) it is listed as being sunlight resistant
B) it has a sunlight resistant marking on the cable sheathing
C) it is rated for less than 300 volts
D) both A and B

Question 24

Locations subject to saturation with water or other liquids in unprotected areas exposed to the weather are called ____________________ locations.

Question 25

The conductors that provide power to pool lighting fixtures must be GFCI protected if the voltage is above __________ volts.

A) 15
B) 24
C) 120
D) 240

Question 26

The minimum burial depth for type UF cable can be found in Table __________ of the NEC.

A) 110.26
B) 220.12
C) 300.5
D) 310.15(B)(16)

Question 27

The most important installation practice for a permanently installed swimming pool is the proper grounding and bonding together of all ____________________ parts in and around the pool.

Question 28

According to the NEC, the minimum burial depth for a direct buried cable like Type UF is __________ inches. (General Rule)

A) 6
B) 12
C) 18
D) 24

Question 29

Lighting fixture assemblies for storage pools are permitted as long as the lamp operates at no more than __________ volts.

A) 15
B) 24
C) 120
D) 240

Question 30

Pool motors can be cord and plug connected but if they are, the cord can't be more than __________ feet long and must contain an equipment grounding conductor sized according to Table 250.122.

A) 1
B) 2
C) 3
D) 4

Question 31

Without a special ballast, fluorescent lamps installed in a garage usually will not start when exposed to temperatures below __________ degrees F.

A) 60
B) 50
C) 70
D) 80

Question 32

If a cable is buried underground to bring power to a detached garage, Type ____________________ cable is typically used.

Question 33

In an outdoor pool area, the NEC requires luminaires, ceiling suspended paddle fans, or lighting outlets not to be installed over the pool or an area extending __________ feet horizontally from the inside wall of the pool.

A) 5
B) 10
C) 12
D) 20

Question 34

For spas and hot tubs, at least one 125-volt, 15- or 20-ampere rated receptacle must be installed at least __________ from the inside wall of the spa or hot tub.

A) 3
B) 5
C) 6
D) 10

Question 35

For a permanently installed swimming pool, any 15 or 20 amp, 125 through 250 volt rated receptacle located within __________ feet of a pool's inside wall must be GFCI protected.

A) 3
B) 10
C) 12
D) 20

Question 36

When bonding the various metal parts of a permanently installed swimming pool, all bonding wires must be solid copper and be ____ AWG or larger.

A) 10
B) 8
C) 6
D) 4

Question 37

Article __________ in the NEC covers the requirements for swimming pools, hot tubs, and hydromassage tubs.

A) 110
B) 250
C) 440
D) 680

Question 38

A light-sensing device used to control lighting fixtures in response to detected light levels is called a _________.

A) transfer switch
B) no-niche luminaire
C) dry-niche luminaire
D) photocell

Question 39

Assuming a 20 amp circuit breaker and GFCI protection, the minimum burial depth for a Type UF cable running to a 120 volt pole light at a residence is __________ inches.

A) 6
B) 12
C) 18
D) 24

Question 40

A welding process for joining materials that employs molten metal to permanently join the conductors together is called __________ welding.

A) stick
B) thermal
C) exothermic
D) cohesive

Question 41

A circuit rated at 6600 watts and 240 volts will draw ____________________ amperes.

Question 42

Name the two basic types of residential generators that can be used in a standby power system.

Question 43

If a lighting fixture is installed under a canopy or under an open porch, it is considered to be in a(n) ____________________ location.

Question 44

If a conductor or cable has a(n) ____________________ in their insulation designation, such as THWN, it means that it is suitable for installation in a wet location.

Question 45

Explain why a 14 AWG Type NM cable is not permitted to be used for a spa or hot tub.

Question 46

Describe a multiwire branch circuit.

Question 47

Receptacle outlets located outdoors that are fed using an underground wiring method and supported by conduit must have at least ____________________ conduit(s) threaded wrenchtight into the box.

Question 48

Explain the benefits of the new generator-ready loadcenters.

Question 49

A(n) ____________________ switch eliminates the possibility of a generator voltage being applied to the secondary of the utility's supply transformer.

Question 50

A(n) ____________________ is a rotating machine used to convert mechanical energy into electrical energy.