Ch 14 - Branch Circuit Installation

inverse time

A(n) __________ circuit breaker has a trip time that gets faster as the fault current flowing through it gets larger.

red

A(n) __________-colored switch cover is used to identify an oil burner safety switch.

20

A ____________________-ampere overcurrent protection device is required for a residential general purpose branch circuit wired with a 12 AWG copper conductor.

14, 12, or 10

A general lighting branch circuit installed in a house and protected by a 15-ampere circuit breaker may be wired with a __________ AWG copper conductor.

hydronic

A hot water heating system is sometimes referred to as a(n) __________ heating system.

small appliance

A receptacle for a gas-fired range is permitted to be connected to a _____________________ circuit.

37 1/2

A wall-mounted electric oven has a nameplate rating of 9 kW at 240 volts. The rated current is ____________________ amperes.

120/240

Electric ranges installed in houses are typically wired for __________ volt operation.

refrigeration

HACR is an acronym found on some circuit breakers and stands for 'heating, air conditioning, and _________________________.

2

How many conductors are required to be run to a water heater?

30.41

If a counter mounted cooktop unit has a nameplate rating of 7300 watts at 240 volts, the current draw will be __________ amperes.

25

If an electric clothes dryer has a rating of 6 kW at 120/240 volts, it will draw ____________________ amperes.

flexible cord and plug connection

If an electric water heater is connected to water piping with connections that are designed so the water heater can be quickly and easily removed, a _____________________________ is allowed.

full load current

In an electric motor circuit the size of the circuit breaker and the circuit conductors is determined by the __________ of the motor.

four

In new construction, how many prongs are required in a plug for a clothes dryer?

urinal, tub or shower

In the NEC, a bathroom is defined as an area that has a basin, a toilet and a __________.

30

Most residential electric water heaters operate on 240 volts, are wired with 10 AWG conductors, and are protected with a __________-ampere overcurrent protection device.

80%

On an individual branch circuit where no other items are served by the circuit, an air conditioner load cannot exceed __________ of the branch circuit ampacity.

low-voltage Class 2

The NEC permits ___________________ doorbell cable to be run next to 120 or 240 volt branch circuits wired with nonmetallic sheathed cable.

20

The NEC requires a laundry circuit to be rated at ____________________ amperes.

unfinished basement or a bathroom

The receptacle installed for a clothes washing machine located in a laundry area of a/an _________________________ must be GFCI protected.

laundry room

There is no spacing requirement for receptacles In a _______________________.

hardwired

When an installation technique is used that brings the circuit conductors directly to an electrical appliance and then terminates them at the appliance, the appliance is said to be ____________________.

Smoke detectors

__________________________ in homes must be hardwired to the electrical system but may have battery backup.

GFCI

A receptacle located under a kitchen sink for a cord-and-plug-connected garbage disposal does not need to be _____________ protected.

36"

The NEC requires at least one 15 or 20 amp, 125 volt receptacle in a bathroom and it must be located no more than __________ inches from the edge of the basin.

2

The minimum number of small appliance circuits required by the NEC in each house is __________.

dual element time delay fuse

A(n) _________________________________ is a fuse type that has a time-delay feature built into it and is often used as an overcurrent protection device for electric motor circuits.

on each level of a home and out of reach of children

Carbon monoxide (CO) alarms should be mounted near bedrooms and living areas, where occupants will hear the alarm while sleeping, and _____________________.

125%

The NEC requires most motor applications to be protected by overload devices sized not more than __________ of the motor's nameplate current rating.

20

The NEC requires that small appliance branch circuits be protected with ____________________-ampere overcurrent protection devices.

working space requirements

The _________________________ of Section 110.26 in the NEC must be maintained when the disconnecting means for an air conditioning unit on the outside of the house is installed.

16

The chime transformer is used to transform the 120 V residential circuit voltage down to the voltage that a chime system will operate on, usually ____________________ volts.

10

When determining the amount of electric heating to be installed in a house the rule of thumb is to use _______ watts per square foot for each heated area in a house.

6

When installing a receptacle for a cord and plug connected appliance, the receptacle must be located no more than __________ feet from the appliance.

Table 430.248

Which NEC Table will tell you the full load current for a single-phase electric motor?

Table 430.52

Which table in the NEC is used to determine the maximum rating of the motor short circuit and ground fault protection device (fuse or circuit breaker)?

1 1/2

While there is no limit to the number of receptacles that can be connected to a general lighting branch circuit, a good rule of thumb is to assign each receptacle outlet a value of ____________________ amperes.

the electrical contractor

Who decides whether 15 or 20 amp rated general lighting circuits will be installed in a residential electrical system?

12

Instead of installing the required bathroom receptacle on a wall or partition adjacent to the basin, it may be installed on the side or face of the basin cabinet, as long as it is located no more than __________ inches below the countertop.

13

There is no maximum number of receptacles allowed on 15, or 20 amp branch circuits in a house but it is suggested that the maximum number of receptacles permitted on a 15-amp rated circuit be no more than 10 and the maximum number of receptacles permitted on a 20-amp rated circuit be no more than __________.