Question 1

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.

Accepted Answer

D

Question 2

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

Accepted Answer

According to the National Electrical Code (NEC), electricians are required to install at least one 120V lighting outlet for each vehicle bay in a residential garage. Since a two-car garage has two vehicle bays, the minimum requirement would be two lighting outlets. However, it is always recommended to install additional lighting outlets to ensure adequate lighting throughout the garage. Installing three lighting outlets would provide even lighting coverage throughout the space.

Question 3

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.

Accepted Answer

A

Question 4

In attached garages, the NEC requires at least __________.

Accepted Answer

The NEC requires at least one 125-volt, 15 or 20 amp receptacle and one wall switch-controlled lighting outlet in attached garages.

Question 5

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?

Accepted Answer

According to NEC, all 125 volt, 15 or 20 amp duplex receptacles installed in a garage to serve cord-and-plug appliances such as a refrigerator or freezer are required to have GFCI protection. This includes receptacles located beside, behind, or just above the appliance.

Question 6

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.

Accepted Answer

Wiring for a storage shed or accessory building should be installed the same as for a detached garage, following all applicable codes and safety requirements.

Question 7

Especially in warmer areas of the country, incandescent lamps used for lighting in a garage can be replaced with compact fluorescent (CFL) lamps.

Accepted Answer

CFL lamps are more energy-efficient and produce less heat than incandescent lamps, making them a better option for warmer areas.

Question 8

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

Accepted Answer

The answer of The conductors that provide power to pool...

Question 9

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

Accepted Answer

The answer of The maximum distance between receptacles in a...

Question 10

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.

Accepted Answer

According to the National Electrical Code (NEC), a permanently installed swimming pool must have at least one 125-volt, 15- or 20-amp receptacle located a minimum of 6 feet from the inside wall of the pool to prevent electrical shock hazards.

Question 11

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.

Accepted Answer

The answer of If the feeder supplying power to a...

Question 12

Outdoor lighting can be mounted on trees.

Accepted Answer

Outdoor lighting can be mounted on trees to create a beautiful illumination effect and highlight the natural features of the landscape.

Question 13

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.

Accepted Answer

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 at all times, whether or not something is plugged into it.

Question 14

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.

Accepted Answer

According to NEC 680.23(A)(2), PVC conduit is not an acceptable means of support for a junction box used with underwater lighting in permanently installed swimming pools.

Question 15

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

Accepted Answer

According to the National Electrical Code (NEC), GFCI protection for hydromassage bathtubs must be provided by a GFCI circuit breaker, not a GFCI receptacle.

Question 16

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

Accepted Answer

The answer of A detached garage must always have at...

Question 17

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

Accepted Answer

According to NEC 680.21(A), an insulated equipment grounding conductor must be run with branch circuit wiring in a raceway from an electrical panel inside the house to pool associated motors. This is to ensure a low-impedance path for fault current to flow in the event of a ground fault, which can help protect against electrical shock and equipment damage.

Question 18

Overhead conductor spans are permitted to be supported by trees.

Accepted Answer

Overhead conductor spans are generally not permitted to be supported by trees because trees can move in the wind, grow, or decay, which can lead to unreliable support and potential hazards such as electrical outages, fires, or electrocution risks. Electrical codes and standards typically require conductors to be supported by structures designed to withstand the environmental loads and provide reliable service.

Question 19

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.

Accepted Answer

The answer of An overhead garage door is not considered...

Question 20

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

Accepted Answer

Type UF cable and Type NM cable are both interior wiring methods that must be installed in accordance with the National Electrical Code (NEC). Therefore, the same rules apply to both types of cable.

Quiz 15: Special Residential Wiring Situations