Chapter 15 quiz

True

Rigid PVC conduit is not permitted as the only means of support for a junction box used with underwater lighting.

Is listed as being sunlight resistant, and has a sunlight-resistant marking on the cable sheathing

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

False

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

50

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

True

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

Standby power system

A backup electrical power system that consists of a generator, transfer switch, and associated electrical equipment; its purpose is to provide electrical power to critical branch circuits when the electrical power from the utility company is not available.

27.5

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

False

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.

Spa or hot tub

A hydromassge pool or tub designed for immersion of users; usually has a filter, heater and motor driven pump; it can be installed indoors or outdoors, on the ground, or in a supporting structure; a spa or hot tube is not designed to be drained after each use.

Photocell

A light-sensing device used to control lighting fixtures in response to detected light levels; no sunlight detected causes it to switch on a lighting fixture; sunlight detected causes it to switch off a lighting fixture.

Dry-niche luminaire

A lighting fixture intended for installation in the wall of a pool that goes in a niche; it has a fixed lens that seals against water entering the niche and surrounding the lighting fixture.

Hydromassage bathtub

A permanently installed bathtub with recirculating piping, pump, and associated equipment; it is designed to accept, circulate, and discharge water each time it is used.

6

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.

Generator

A rotating machine used to convert mechanical energy into electrical energy.

Storable swimming pool

A swimming pool constructed on or above the ground with a maximum water-depth capacity of 42 inches or a pool with nonmetallic, molded polymeric walls (or inflatable fabric walls) regardless of size or water depth capacity.

Permanently installed swimming pool

A swimming pool constructed totally or partially in the ground with a water-depth capacity of greater than 42 inches; all pools, regardless of depth, installed in a building are considered permanent.

Transfer switch

A switching device for transferring one or more load conductor connections from one power source to another.

Wet-niche luminaire

A type of lighting fixture intended for installation in a wall of a pool; it is accessible by removing the lens from the forming shell; this luminaire type is designed so that water completely surrounds the fixture inside the forming shell.

Twistlock receptacle

A type of receptacle that requires the attachment plug to be inserted and then turned slightly in a clockwise direction to lock the plug in place; the attachment plug must be turned slightly counterclockwise to release the plug so it can be removed from the receptacle.

Low voltage contact limit

A voltage that does not exceed the following values: 15 volts sinusoidal AC, 21.2 volts peak for nonsinusoidal AC, 30 volts for continuous DC, and 12.4 volts peak for DC that is interrupted at a rate of 10 to 200 Hz.

Exothermic welding

A welding process for making copper bonding connections on the bonding grid for a permanently installed swimming pool using an exothermic reaction of a thermite composition to heat the metal; this process is sometimes called "Cad-weld".

Transfer

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

18

According to the NEC, the minimum burial depth for a direct buried cable like type UF is ____ inches. (General rule)

Duplex receptacles located beside, behind, or located on the wall and just above the appliance.

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?

False

Overhead conductor spans are permitted to be supported by tress.

3

Pool motors can be cord-and-plug connected but if they are, the cord cannot be more than ____ feet long and must contain an equipment grounding conductor sized according to table 250.122.

False

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

680

Article ____ in the NEC covers the requirement for swimming pools, hot tubs, and hydromassage tubs.

680

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

12

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.

20

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

6

For spas and hot tubs, at least one 125 volt, 15 or 20 amp receptacle must be installed at least ____ feet from the inside wall of the spa or tub.

5

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.

One 125 volt, 15 or 20 amp receptacle and one wall switch-controlled lighting outlet.

In attached garages, the NEC requires at least _____.

Wet location

Installations underground or in concrete slabs or masonry in direct contact with the earth in locations subject to saturation with water or other liquids, such as in unprotected areas exposed to the weather.

Shall not

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.

Critical load

The electrical loads that are determined to require electrical power from a standby power generator when electrical power from the local electric utility company is interrupted.

There is no NEC requirement

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

300.5

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

Forming shell

The support structure designed and used with a wet-niche lighting fixture; it is installed in the wall of a pool.

No-niche luminaire

is a lighting fixture intended for installation above or below the water level; it does not have a forming shell that it fits into but rather sits on a the surface of the pool wall.