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chap 3 eeu > Branch Circuit Requirement > Flashcards

Branch Circuit Requirement Flashcards

1
Q

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

A

switchboard or panel board

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2
Q

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

A

branch circuit

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3
Q

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

A

outlet

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4
Q

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

A

branch circuit

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5
Q

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

A

Individual Branch Circuit

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6
Q

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

A

Individual Branch Circuit

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7
Q

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.

A

Individual Branch Circuit

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8
Q

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

A

General Purpose Branch Circuit

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9
Q

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.

A

General Purpose Branch Circuit

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10
Q

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

A

Appliance Branch Circuit

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11
Q

Appliance branch do not
supply ________.

A

lighting fixtures

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12
Q

Appliance branch circuits
cannot exceed _________

A

20 A

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13
Q

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.

A

Multiwire Branch Circuit

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14
Q

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

A

Life Safety Branch Circuit

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15
Q

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

A

Split wired duplex receptacles

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16
Q

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.

A

Critical Branch Circuit

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17
Q

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

A

split wiring

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18
Q

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.

A

branch circuit rating

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19
Q

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

A

branch circuit

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20
Q

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

A

false (Larger than)

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21
Q

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.

A

50%

22
Q

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

A

true

23
Q

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

A

true

24
Q

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.

A

80%

25
Q

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.

A

80%

26
Q

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

A

Individual Circuits

27
Q

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.

A

50%

28
Q

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

A

Appliance Circuits

29
Q

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

A

continuous load

30
Q

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

A

80%

31
Q

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

A

circuit rating.

32
Q

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

A

T

33
Q

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

A

F (LARGE lighting installations that require MANY switches).

34
Q

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

A

T

35
Q

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

A

T

36
Q

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

A

F (upward)

37
Q

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

A

Overcurrent protection (OCP)
device

38
Q

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

A

T

39
Q

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

A

T

40
Q

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

A

5000A and 10000A

41
Q

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

A

F (ugrounded)

42
Q

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

A

T

43
Q

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

A

F (are not protected)

44
Q

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.

A

Feeder

45
Q

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

A

T

46
Q

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

A

F ( maximum)

47
Q

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

A

switchboards and panelboards

48
Q

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 .

A

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

49
Q

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

A

F (100%)

50
Q

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

A

T

51
Q

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

A

F ( do not apply)

52
Q

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

A

F ( highly recommended )

chap 3 eeu (2 decks)

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