Branch Circuit Requirement

Question 1

A building electrical systems consists of several circuits that
extend out from the ______ or ______.

Answer 1

switchboard or panel board

Question 2

A _________ is that portion of the building wiring system that
extends beyond the final over current protection device that
is protecting the circuit.

Answer 2

branch circuit

Question 3

________ is a point in a wiring system where current is taken to supply an appliance, piece of equipment, or
lighting installation.

Answer 3

outlet

Question 4

Is composed of an overcurrent
protection device (fuse or circuit breaker), wiring , and one or more outlets.

Answer 4

branch circuit

Question 5

These circuits usually lead
directly from the distribution panel to the
appliance and do not serve any other
electrical devices.

Answer 5

Individual Branch Circuit

Question 6

is sometimes known in the trade as a
dedicated or special purpose circuit.

Answer 6

Individual Branch Circuit

Question 7

A branch circuit that serves one receptacle or piece of equipment such as for a range, clothes dryer, large copy machine, or other
piece of machinery.

Answer 7

Individual Branch Circuit

Question 8

A type of branch circuit that supplies two or more outlets for
lighting and appliances.

Answer 8

General Purpose Branch Circuit

Question 9

This type of circuit may
be reffered to as a lighting circuit; this is a
carryover from the days when electricity was
first used in buildings and its predominant
purpose was lighting.

Answer 9

General Purpose Branch Circuit

Question 10

This is the type of branch circuit that supplies
energy to one or more outlets to which
appliances are to be connected.

Answer 10

Appliance Branch Circuit

Question 11

Appliance branch do not
supply ________.

Answer 11

lighting fixtures

Question 12

Appliance branch circuits
cannot exceed _________

Answer 12

20 A

Question 13

A branch circuit consisting of two or more
undergrounded (hot) conductor having a
volatge between them and a common neutral (grounded) conductor that is shared between the ungrounded conductors such as in a
120/240 V three-wire circuit.

Answer 13

Multiwire Branch Circuit

Question 14

An emergency system of feeders and branch circuit that provides adequate power to patients
and personnel.

Answer 14

Life Safety Branch Circuit

Question 15

_________
are fed with a 120/240 V circuit
having two ungrounded (hot)
conductors, a grounded neutral
conductor, and a grounding
conductor.

Answer 15

Split wired duplex receptacles

Question 16

An emergency system of feeders and
circuits intended to provide power to task
illumination, special power circuits, and selected receptacles serving areas and functions related to
patient care.

Answer 16

Critical Branch Circuit

Question 17

_______ allows power to be drawn
from two separate circuits on one duplex
receptacle.

Answer 17

split wiring

Question 18

The _________is
determined by the rating of the over
current protection device (fuse or
circuit breaker) used to protect the
wiring in the circuit from excessive
current flow.

Answer 18

branch circuit rating

Question 19

Design of a _______
involves sizing conductors and
over current protection (fuse
or circuit breaker) that match
the circuit rating.

Answer 19

branch circuit

Question 20

all electromechanical
(having a motor) appliances or pieces
of equipment generally will have a
VA rating lower than the power (P)
rating. T or F

Answer 20

false (Larger than)

Question 21

When a general purpose circuit feeds fixed appliances and
luminaires or portable appliances, the total of the fixed
appliances should be no more than __% of the branch circuit
rating.

Answer 21

50%

Question 22

All electric-resistant appliance or
pieces of equipment such as an oven,
water-heater and space-heater (no
blower) and lights generally have
power (wattage) ratings equal to their
connected loading (VA rating). T or F

Answer 22

true

Question 23

General purpose circuits feed more than one outlet
for lighting or other purpose. T or F

Answer 23

true

Question 24

When portable appliances will be used on a general purpose
a circuit, the limit for any one portable appliance is __% of the
branch circuit rating.

Answer 24

80%

Question 25

In commercial applications, convenience receptacles are computed at a load of 1.5 A (180 VA) per receptacle and are limited to __% of the rating.

Answer 25

80%

Question 26

These circuits provide power to a single outlet such as a receptacle serving a range, clothes dryer, or copy machine.

Answer 26

Individual Circuits

Question 27

Although there are no size limitations for an individual circuit rating, appliances and equipment rated at above 25 A must be placed on a separate individual circuit because of the __% maximum single load limitation in general purpose circuiting.

Answer 27

50%

Question 28

These circuits serve two or more outlets to which only appliances are connected.

Answer 28

Appliance Circuits

Question 29

A ____________ is a connected load that operates for 3 hr or more at any time.

Answer 29

continuous load

Question 30

connected load on a _ continuous-load circuit should not exceed __% of the individual circuit rating.

Answer 30

80%

Question 31

On a branch circuit, conductor size is tied to ________ rating.

Answer 31

circuit rating.

Question 32

Switches must be selected to match the load they control. T or F

Answer 32

T

Question 33

A panel board-like enclosure called lighting control panel is used in small lighting installations that require less switches. T or F

Answer 33

F (LARGE lighting installations that require MANY switches).

Question 34

Receptacles must be selected to match the appliance or equipment they serve. T or F

Answer 34

T

Question 35

ordinary convenience receptacles and switches are general wall mounted and there are no specific height requirements for switches and receptacles. T or F

Answer 35

T

Question 36

unless a receptacle is controlled by a switch, the receptacle is frequently aligned with the grounding slot downward.T or F

Answer 36

F (upward)

Question 37

An ____________, serves to limit current levels in a conductor by interrupting power when current limitations are exceeded.

Answer 37

Overcurrent protection (OCP) device

Question 38

The voltage rating of a fuse or circuit breaker must be equal to or greater than the voltage of the circuit in which the fuse is applied. T or F

Answer 38

T

Question 39

The current carried (amperage) by the electrical circuit or system protected by an OCP device must not exceed the maximum current rating of the circuit breaker. T or F

Answer 39

T

Question 40

Furthermore, the amperes interruption current (AIC) rating for circuit breakers should be at least _______ A and ________ A for fuses.

Answer 40

5000A and 10000A

Question 41

The OCP device must protect the grounded conductors in a circuit to ensure that power to the circuit Is interrupted by the OCP device. T or F

Answer 41

F (ugrounded)

Question 42

The fuse or circuit breaker must be installed at a location in the circuit where the conductors receive power. T or F

Answer 42

T

Question 43

the neutral (grounded) and grounding conductors are protected by overcurrent protection. T or F

Answer 43

F (are not protected)

Question 44

is a set of conductors that carry a comaparatively large amount of power from the service equipment to a second panelboard, called a subpanelboard where branch circuit further distribute the power.

Answer 44

Feeder

Question 45

Feeders should be capable of carrying the amount of current required by the load, plus any current that may be required in the future. T or F

Answer 45

T

Question 46

Feeder must be designed to provide sufficient power to the branch circuits they supply so feeder conductor size is based on the minimum load to be supplied by the feeder. T or F

Answer 46

F ( maximum)

Question 47

_____ and ________ can be used as distribution equipment, ata point downstream from the service entrance equipment.

Answer 47

switchboards and panelboards

Question 48

the required clearance of service equipment found in code is typically minimum vertical clearancs of __ft above roadways , __ft above driveways and__ ft above sidewalds .

Answer 48

18ft above roadways , 12ft above driveways and 10 ft above sidewalds .

Question 49

Primary and secondary conductors are sized to carry 50% of the ampere rating of the overcurrent protection. T or F

Answer 49

F (100%)

Question 50

All tamper-resistant receptacles must have either the words “tamper resistant” or the letters “TR” (minimum 3/16 in or 5 mm high) on the device as a clear indication that this is a tamper-resistant receptacle. T or F

Answer 50

T

Question 51

Ground Fault Circuit Protection requirements apply to equipment rated at 240 V (e.g. baseboard heater, room air conditioners, welding receptacles, or other outlets that are not rated at 125 V). T or F

Answer 51

F ( do not apply)

Question 52

For homes protected by fuses, the convenience receptacle or portable-type GFCI protection is not recommended. T or F

Answer 52

F ( highly recommended )