ELECTRICAL LEVEL 3 MODULE 1 LOAD
CALCULATIONS AND BRANCH FEEDER
CIRCUITS Questions and Answers Latest
(Verified Answers) | Complete A+ Guide |
100% Correct
• Branch circuit . Answer: circuit conductors between the final
overcurrent device protecting the circuit and the outlet(s)
• continuous load . Answer: load where the maximum current is
expected to continue for three hours or more
• device . Answer: unit of an electrical system, other than a conductor,
that carries or controls electric energy as its principal function
• individual branch circuit . Answer: branch circuit that supplies only
one piece of utilization equipment
• outlet . Answer: point on the wiring system at which current is taken to
supply utilization equipment
• overcurrent . Answer: any current in excess of the rated current of
equipment or the ampacity of a conductor. it may result from overload,
short circuit, or ground fault.
• receptacle . Answer: contact device installed at an outlet for connection
as a single contact device. a single receptacle is a single contact device
with no other contact device on the same yoke. a multiple receptacle is a
single device containing two (duplex) or more receptacles.
• receptacle outlet . Answer: outlet where one or more receptacles are
installed.
, • utilization equipment . Answer: equipment that utilizes electric energy
for electronic, chemical, heating, lighting, electromechanical, or similar
purposes.
• what is the maximum continuous load that may be connected to a 20A,
120V fuse? . Answer: 20A x 80% or .80 = 16A (continuous loads are
calculated at 125% of the maximum current rating of the load. the
reciprocal of 125% is equivalent to 80%)
• The voltage drop for a 208V, 1 ott circuit with a load of 28A, using
No. 8 stranded copper conductors at the circuit length of 160' is....... .
Answer: VD (Voltage Drop) = (2xLxRxI) / 1000, L- load center or total
length in feet, R- conductor resistance (NEC chapter 9, table 8), I-
current. (2x160ftx.776x80A)/1000 = 6.97V
• The ampacity of a 120V, 1 ott load rated at 800VA is..... . Answer:
800VA / 120V = 6.67A
• Appliance . Answer: utilization equipment, generally other than
industrial, normally built in standardized sizes or types, that is installed
or connected as a unit to perform one or more functions such as clothes
washing, air conditioning, food mixing, deep frying, or other purposes
• Appliance branch circuits . Answer: Branch circuits supplying energy
to one or more outlets to which appliances are to be connected. such
circuits are to have no permanently connected lighting fixtures that are
not part of an appliance
• Demand factors . Answer: ratio of the maximum demands of a system,
or part of a system, to the total connected load of a system or the part of
the system under consideration
• General-purpose branch circuit . Answer: Branch circuits that supply
two or more receptacles or outlets for lighting and appliances
CALCULATIONS AND BRANCH FEEDER
CIRCUITS Questions and Answers Latest
(Verified Answers) | Complete A+ Guide |
100% Correct
• Branch circuit . Answer: circuit conductors between the final
overcurrent device protecting the circuit and the outlet(s)
• continuous load . Answer: load where the maximum current is
expected to continue for three hours or more
• device . Answer: unit of an electrical system, other than a conductor,
that carries or controls electric energy as its principal function
• individual branch circuit . Answer: branch circuit that supplies only
one piece of utilization equipment
• outlet . Answer: point on the wiring system at which current is taken to
supply utilization equipment
• overcurrent . Answer: any current in excess of the rated current of
equipment or the ampacity of a conductor. it may result from overload,
short circuit, or ground fault.
• receptacle . Answer: contact device installed at an outlet for connection
as a single contact device. a single receptacle is a single contact device
with no other contact device on the same yoke. a multiple receptacle is a
single device containing two (duplex) or more receptacles.
• receptacle outlet . Answer: outlet where one or more receptacles are
installed.
, • utilization equipment . Answer: equipment that utilizes electric energy
for electronic, chemical, heating, lighting, electromechanical, or similar
purposes.
• what is the maximum continuous load that may be connected to a 20A,
120V fuse? . Answer: 20A x 80% or .80 = 16A (continuous loads are
calculated at 125% of the maximum current rating of the load. the
reciprocal of 125% is equivalent to 80%)
• The voltage drop for a 208V, 1 ott circuit with a load of 28A, using
No. 8 stranded copper conductors at the circuit length of 160' is....... .
Answer: VD (Voltage Drop) = (2xLxRxI) / 1000, L- load center or total
length in feet, R- conductor resistance (NEC chapter 9, table 8), I-
current. (2x160ftx.776x80A)/1000 = 6.97V
• The ampacity of a 120V, 1 ott load rated at 800VA is..... . Answer:
800VA / 120V = 6.67A
• Appliance . Answer: utilization equipment, generally other than
industrial, normally built in standardized sizes or types, that is installed
or connected as a unit to perform one or more functions such as clothes
washing, air conditioning, food mixing, deep frying, or other purposes
• Appliance branch circuits . Answer: Branch circuits supplying energy
to one or more outlets to which appliances are to be connected. such
circuits are to have no permanently connected lighting fixtures that are
not part of an appliance
• Demand factors . Answer: ratio of the maximum demands of a system,
or part of a system, to the total connected load of a system or the part of
the system under consideration
• General-purpose branch circuit . Answer: Branch circuits that supply
two or more receptacles or outlets for lighting and appliances
