ELC 401 Final (Completion Portion)

"Future proofing"

"_____________" means wiring a new home during the original construction (rough-in) stage for all the applications that the homeowner may want now or at some later date.

Utility

A connection on the ________ side of the main disconnect is known as a supply-side point of connection.

Circuit breaker

Lock-off provisions for appliances must be permanently installed on the _______ or switch.

Normal

_______ loading of a circuit is when the current flowing is within the capability of the circuit and/or the connected equipment.

Local codes

_______ may or may not accept wireless smoke alarm systems

X10

________ technology is simple and is the least costly home automation system, especially for retrofit wiring in existing homes.

Service drop

____________ conductors are permitted to be attached to and supported by the service mast.

Atic

bathroom exhaust fans, vents for clothes dryers, and similar high-humidity sources are never to be vented directly into the _____ or other dead spaces.

Power limited

lass 2 circuits ________ and are considered safe from fire hazard and from electric shock hazard.

310.15(B)(7)

may only be used for 120/240-volt, 3-wire, residential single-phase service-entrance conductors, underground service conductors, and feeder conductors that serve as the main power feeder to a dwelling unit.

Night light

the heat/vent/light is controlled by four switches, one switch each for the heater, the light, the exhaust fan, and the night light.

UFER

A 4 AWG bare copper conductor at least 20 ft (6.0m) long installed identically to the steel reinforcing rod is also permitted as a concrete-encased grounding electrode. This is often referred to as a(n) _____________ ground.

5 ft

A clearly labeled emergency shutoff switch for the control of the recirculation system and jet systems for spas and hot tubs must be installed at a point readily accessible to the users and not less than _______ away and within sight of the spa or hot tub.

Individually locked

A disconnect need not be in sight of motor and driven machinery if the disconnect can be _____ in the open OFF position.

Permanently installed

A hydromassage tub is a(n) _______ bathtub equipped with a recirculating piping system, pump and associated equipment.

Bathroom

A panelboard must not be installed in a(n) ________.

Aluminum frame

A photovoltaic module is a manufactured unit made up of may semi-conductor PV cells encased in a protective covering and mounted to a(n) __________.

Evaporative cooler

A receptacle is not required for one and two-family homes if the HVAC equipment is a(n) ______. These require minimal servicing.

Contors any other circuit

A remote-control circuit is any electrical circuit that _______ through a relay or equivalent device.

4 AWG

A residence is supplied by 2/0 AWG service entrance conductors. Checking Table 250.66, we find that the minimum grounding electrode conductor must be a(n) _______ AWG copper conductor.

Standby power source

A transfer switch shifts power from the normal utility source to the __________.

Overload

A(n) ________ is a condition where the current flowing in a circuit is more than the current or equipment is designed to handle.

Short circuit

A(n) _________ is a condition where two or more conductors come into contact with one another.

Ground fault

A(n) __________ is a condition where a hot conductor comes into contact with a grounded surface.

50

According to 690.41, one conductor of a 2-wire PV system _______ volts shall be grounded.

80%

According to the NEC, the total load of a cord-and-plug connected range or cooktop cannot exceed ______ percent of the rating fo the branch circuit.

Locked in OFF position

All motor-driven appliances must be provided with a means disconnecting the appliance from the ungrounded conductors. The branch-circuit breaker can serve as the disconnecting means if within sight of the appliance or capable of being _______.

Type-S

All new plug fuse installations shall be type-S fuses.

Raintight

An exterior raceway containing service entrance conductors must be ________ and arranged to drain.

430.102

Article 430 contains requirements for motor installations, The section that requires a motor disconnect to be within sight of the motor or capable of being locked is _______.

Wiring

Article 760 of the National Electrical Code contains requirements for installing ______ for fire alarm systems.

6 ft

At least one 125-volt, 15- or 20-amp GFCI-protected receptacle must be installed no closer than _________ ft but not farther than 10ft from the inside wall of a spa or hot tub.

Outlet boxes

Because TV is a low-voltage system, metallic or nonmetallic standard single-gang device boxes, 4-in. square ________ with a plaster ring, plaster rings only, or special mounting brackets can be installed during the rough-in stage at each likely location of a television set.

Noise or decible

Because generators produce a certain level of _________ when running, you will want to check with your building authorities to make sure the generator you choose is in compliance with local codes that might be applicable

Overcurrent protection

Bonding at service-entrance equipment is very important because service-entrance conductors do not have ____________ at their line side, other than the electric utility company's primary transformer fuses.

Class 2 transformers

Chime transformers are listed as ______ because of their lower voltage rating and power limitations.

Let through current

Current-limiting overcurrent devices will limit the amount of let through current by opening so fast that the full value of fault-current will not be reached.

70% / 10AWG

For electric ranges that have a computer demand of 8.75 kW or more, the neutral conductor can be reduced to not less than ______ percent of the branch-circuit rating but never smaller than ______ AWG.

Caculated

For free standing electric ranges, Table 220.55 permits the ______ load to be considerably less than the connected load.

3-pole double throw (TPDT)

For home installations, transfer switches may be _________ or double-pole, double throw (DPDT), depending on how the type of system is installed.

Main service panel

For typical residential wiring, the grounding electrode conductor is run between the ________ neutral/ground terminal bar and the grounding electrode system.

Watts

Generators for home use are generally rated in _______.

Hydronic

Hot water systems are very adaptable to zone control by using a combination of one or more circulating pumps and/or valves for the different zones. Hot water heating systems are referred to as _______ systems.

6

Identified handle ties are permitted to disconnect all conductors of a service as long as it takes no more than ______ operations of the hand to shut everything off.

16 amps

If a 115/230-volt, dual-voltage motor has a full-load current of 8 amperes at 230 volts, the same motor connected for 115-volt operation will draw ________ amperes.

Portable cord

If a homeowner has a generator without GFCI protection, a listed ___________ that has GFCI protection may be used.

Grounding electrode conductor

In a residential service, the grounded (neutral) conductor is permitted to be smaller than the ungrounded (hot) conductors provided it is sized to handle the neutral load and is not smaller than the _________.

Fault current

In addition to carrying the unbalanced current, the service neutral conductor must also be capable of safely carrying any ___________ that it might be called upon to carry.

Sleeping or habitable / sleeping or habitable

In new residential construction smoke alarms must be installed in all __________ rooms and outside the ________ area, and on each floor.

Power outage

In the event of a(n) _________, an ac-dc smoke alarm continues to operate on the battery.

"Suitable for use as service equipment"

It is extremely important that a disconnect or panelboard used as service equipment be marked "____________".

Metal raceway / cable

Keep the antenna and lead-in conductors at least 2 in. (50mm) from other open wiring (as in old houses) unless the other wiring is in a(n) _______ or ________.

Larger or Largest

Loads, such as heating and air-conditioning, that do not operate at the same time are said to be non-coincident loads. While separate circuits must be designed to serve each load, when calculating service load per NEC 220.60, only the ________ of two non-coincident loads need to be included.

150

Low-voltage wiring used for door bell and thermostat wiring is a residence is generally Class 2 wiring, which has a thermoplastic insulation with a voltage rating of not less than ______ volts.

125%

Most installations require motor overload protection not to exceed _____ of the motor's full-load current rating.

50%

NEC 210.23(A)(2) limits cord-connected equipment to ______ percent fo the branch-circuit ampere rating.

Parallel

NEC 725.121(B) prohibits connecting transformers in ______ unless specifically listed for interconnection.

422.11(A)

NEC ______ requires that the branch circuit overcurrent protection shall not exceed the rating marked on the appliance.

110.26

NEC __________ provides rules for working space around electrical equipment.

Manufacturers'

NFPA 72 requires that equipment be installed according to _________ instructions.

Neutral / grounded

Never connect the green equipment grounding conductor to the ______ branch circuit conductor.

Permanently

Never install electrical equipment, junction boxes, or conduit boxes above a _________ closed-in ceiling or within a wall.

3-wire grounding

Portable dishwashers are supplied with a 3-wire cord and plug. If the 3-wire plug cap is plugged into a properly connected ______ receptacle, the dishwasher is adequately grounded.

At least 12"

Telephone conductors must be separated by _________ from light and power conductors unless the light and power conductors are in a raceway, or in Type NM cable, Type AC cable or Type UF cable.

440

The Code requirements for standard resistance-type electric water heaters are found in Article 422. Because heat pump water heaters contain a hermetic refrigerant motor compressor, their Code requirements are found in Article ______.

50%

The air-conditioner load shall not exceed _____ percent of the branch-circuit ampacity if other loads are also served.

422

The code Article that specifically addresses electrical appliances is 422.

250.66

The grounding electrode conductor is sized according to Table ________.

40 amps

The maximum current and voltage rating permitted by Code fo the cord-and-pug connected air-conditioner is ______ at 250 volts.

Heaters

The overload protection for a motor might be thermal overloads (sometimes called _________) in the controller, electronic sensing overload devices, built-in thermal protection, or time-delay fuses.

Demarcation point

The point where the telephone company ends and the homeowner's interior wiring begins is called the ___________.

Hard wire / cord and plug

The two general methods of connected food-waste disposers are hard wire and cord and plug.

Photoelectric / ionization

The two most common types of smoke detectors are ________ and _______.

Article 680

The wiring for storable pools must follow the basic requirements found in ___________, Part 1.

15

UL Standard 1563 establishes the maximum water temperature at 104 degrees F, and the suggested maximum time of immersion is generally ______ minutes.

Unshielded Twisted Pair

UTP stands for___________.

Marked OFF position

Unit switches that have a(n) _______ are acceptable as the disconnecting means for that appliance.

2-wire

Water pumps that contain all required stating and protection components and connect directly to the pressure switch with o above-ground controller, are often called _______ pumps.

220.55

When calculating the size of the required service, household cooking equipment demand factors are given in Table _________.

220.54

When calculating the size of the required service, household electric clothes dryer demand factors are given in Table __________.

12 inches

When coaxial cables are run underground, they must be separated at least ________ inches from underground light and power conductors, unless either the coaxial or power cables are run in a raceway.

Overcurrent devices

When determining the circuit size and current of a PV system, first use a multiplier to calculate the maximum source circuit current, then apply a second multiplier to determine the size of system conductors and ______________.

75%

When there are four or more appliances fastened in place, a demand factor of _________ shall be applied to the appliances.

Supplemental electrode

When using a metal water pipe as a grounding electrode, a(n) ___________ is required.

Remote control

Wireless __________ devices for TVs use infrared (IR) technology, although some may operate on radio frequency (RF).

Carrier wave signal

X10 technology transmits ____________ that are superimposed on the 120/240-volt, 60-cycle branch-circuit wiring in the home.

Fire alarm

_______ conductors in cable must be a minimum of 26 AWG.