11-11Residential Electrical Services

a. current in the neutral load is less than the current in the hot load.

A GFCI sensor will trip when the ____. a. current in the neutral load is less than the current in the hot load b. current in the neutral load is greater than the current in the hot load c. device gets wet d. current is less than the value established for a Class A device

a. the main service panel and a subpanel

A feeder is used to connect _______. a. the main service panel and a subpanel b. the main panel and duplex receptacles c. branch circuits to circuit breakers d. the service drop to the main panelboard

b. made of copper, aluminum, or copper-clad aluminum

A grounding electrode conductor must be ______. a. made of one-quarter inch steel plate b. made of copper, aluminum, or copper-clad aluminum c. green or green with yellow stripes d. protected by a Class A GFCI circuit breaker

B. Fixed appliances

According to NEC Section 220.53, loads for which of the following appliances shall be permissible to apply a demand factor of 75%? a. Kitchen appliances b. Fixed appliances c. Heating appliances d. Small appliances

a. Two 120V, 20A small appliance branch circuits

According to the NEC®, which of the following is required for the small appliance loads in each kitchen area? a. Two 120V, 20A small appliance branch circuits b. One 4,050VA small appliance branch circuit c. One 1,500VA, 20A small appliance branch circuit d. Two 240V, 10A small appliance branch circuits

c. furnishes more energy than it consumes

An electric heat pump is a type of HVAC system that _____. a. circulates hot water to baseboards b. must be supplied by 20A circuits c. furnishes more energy than it consumes d. can also operate using combustible fuels

b. GFCI protected

Any outlet that supplies power to a hot tub shall be _______. a. less than 5 feet from the inside wall of the hot tub b. GFCI protected c. within sight of the hot tub d. 240V

c. 1-1/4 inches

Cables routed through bored holes in framing members must maintain a distance from the nearest edge of not less than ______. a. 1/16 inch b. 1/4 inch c. 1-1/4 inches d. 1-1/2 inches

d. 125%

Conductors used for electric heating units must be sized for what percentage of the heater's nameplate rating? a. 70% b. 95% c. 100% d. 125%

c. 150V to ground

Exposed noncurrent-carrying metal parts of fixed equipment must be grounded if the equipment operates with any terminal over_____. a. 60V to ground b. 120V to ground c. 150V to ground d. 240V to ground

d. 1,200

How many square feet of livable space are in the home in figure above? a. 900 b. 1,000 c. 1,100 d. 1,200

c. must be at least 6 feet from the inside walls of the pool

In a residential pool area, receptacles ______. a. are not allowed within the fenced area b. must be approved for providing power to underwater lighting fixtures c. must be at least 6 feet from the inside walls of the pool d. are only allowed if required by the pool manufacturer

b.20A or less

Listed FMC may be used as an equipment grounding conductor if the circuit conductors are protected by overcurrent devices rated at ______ a. 15A or less b. 20A or less c. greater than 20A d. greater than 30A

d. Initial installation costs are less than other types of systems

One of the advantages of electric heat is that ______. a. it is less expensive than other types of fuels b. only one thermostat is needed for the whole system c. system maintenance is only required once a year d. initial installation costs are less than other types of systems

b. at the panelboard

Power to the entire residence is shut of at the main service disconnect located _______. a. in the basement or unfinished crawlspace b. at the panelboard c. at the service drop d. at the main branch circuit

b. Type NM cable

Romex® is a trade name for _____. a. Type MC cable b. Type NM cable c. Type AC cable d. Type SE cable

b. 70%

The NEC allows the load calculation for the ground neutral conductor supplying electric ranges and dryers to have a demand factor of ______. a. 50% b. 70% c. 75% d. 100%

a. branch circuits

The conductors that extend from the panelboard to various outlets are called _____. a. branch circuits b. feeders c. grounding electrode conductors d. service-entrance conductors

c. 300V to ground

The minimum clearance of service drop conductors over a residential driveway is reduced to 12 feet when the voltage is limited to ________. a. 120V to ground b. 270V to ground c. 300V to ground d. 360V to ground

d. NEC Section 230.70

The section of the NEC that lists the requirements for installing service disconnecting means is ______. a. NEC Section 110.26 b. NEC Section 220.54 c. NEC Section 230.6 d. NEC Section 230.70

b. Two three- way switches

To control a device from three locations, a four-way switch must be used with which of the following? a. One photoelectric switch b. Two three-way switches c. Four three-way switches d. One two-pole switch

d. Six or more

To control stairway lighting, a wall switch is required at each level when how many risers separate floor levels? a. Three or more b. Four or more c. Five or more d. Six or more

a. Three-way switches

Traveler conductors are used to connect two _______. a. three-way switches b. photoelectric switches c. relays d. dimmers

a. 1/4"

When a noncombustible wall finish is used, an outlet box may be recessed______. a. 1/4ʺ b. 1/2ʺ c. 5/8ʺ d. 3/4ʺ

b. Type SE cable

When used as an outside service-entrance conductor, which of the following must be secured every 30 inches? a. Type NM cable b. Type SE cable c. Type MC cable d. Type AC cable

a. Receptacles within garages

Which of that following locations at dwelling units require GFCI protection? a. Receptacles within garages b. Receptacles in finished basements c. Receptacles that serve washers and dryers d. Crawl spaces above grade level

c. Residential small appliance branch circuits

Which of the following circuits require a minimum of 20A of overcurrent protection? a. Fixed appliance branch circuits b. General purpose branch circuits c. Residential small appliance branch circuits d. Residential large appliance branch circuits

a. Metal underground water pipe in direct contact with the earth for 10 feet

Which of the following is an NEC®-approved grounding electrode? a. Metal underground water pipe in direct contact with the earth for 10 feet b. Metal underground gas pipe in direct contact with the earth for 10 feet c. A ground ring with a 25-foot diameter d. A 5/8-inch galvanized aluminum rod 5 feet in length

c. Two 15A circuits

Which of the following is required to carry the lighting load for the residence in the figure above? a. One 20A circuit b. One 33.75A circuit c. Two 15A circuits d. Three 15A circuits

c. 3,600VA

Which of the following is the minimum NEC lighting load requirement for the home in the figure above? a. 2,000VA b. 2,800VA c. 3,600VA d. 5,400VA

c. Type MC cable

Which of the following must be supported at intervals of 6 feet or less? a. Type NM cable b. Type SE cable c. Type MC cable d. Type UF cable

a. A GFCI sensor

Which of the following will detect a current imbalance as low as 4 miliamps? a. A GFCI sensor b. A mechanical sensor c. An AFCI sensor d. A fiber-optic sensor

a. NEC Section 250

Which section of the NEC® covers equipment grounding and equipment grounding conductors? a. NEC Section 250 b. NEC Section 340 c. NEC Section 680 d. NEC Section 725

c. NEC Section 680

Which section of the NEC® covers the installation of pools and spas? a. NEC Section 250 b. NEC Section 340 c. NEC Section 680 d. NEC Section 725

a. Type MC

Which type of cable with a corrugated sheath has a maximum bend radius of 7 times the cable diameter? a. Type MC b. Type SE c. Type AC d. Type NM