National Electrical Code Exam Questions with Verified Solutions (Graded A+)
load calculations must be performed in order to determine the _ - Answers size of services and feeders
a feeder is defined as all circuit conductors between the _ containing fuses or breakers that feed branch
circuits - Answers service disconnecting means and the panelboard
_ are not included in the calculated floor area of a dwelling unit - Answers open porches
a scale ruler is used in _ - Answers determining the location of outlets
the _ is not an important piece of information to gather before performing load calculations - Answers
location of circuit breakers
the _, including the strip heat and blower motor, is necessary information for calculating loads - Answers
total volt-ampere load
the lighting load for residential dwelling unit is _ volt-amperes per square foot - Answers 3
the _ for each floor of a one family dwelling shall be computed using the outside dimensions - Answers
floor area
_must be included when calculating a dwelling unit service - Answers small appliance branch circuits
a dwelling unit must have at least _ small appliance branch circuits - Answers 2
each laundry branch circuit is calculated at - Answers no less than 1500 volt amperes
individual household cooking appliances rated more than _ watts (volt-amperes) can be derated using
Table 220.55 demand factors (and all applicable notes) - Answers 1750
no derating is allowed when there are only 1, 2, or 3 appliances - Answers fastened in place
the term _ designates utilization equipment commonly built in standardized types and sizes and
installed as a unit to perform specific functions - Answers appliance
a clothes dryer neutral load on a feeder can be calculated at _ % - Answers 70
multiplying voltage by amperage produces - Answers volt-amperes (VA)
horsepower ratings must be converted to _ before they can be added to the load calculation form -
Answers volt amperes (VA)
the smaller of the two (or more) _ loads can be omitted as long as they are never energised
simultaneously - Answers noncoincident
fur the purpose of the standard method load calculation for a one family dwelling, the terms neutral and
_ are synonymous - Answers grounded
, a demand factor of _ % can be applied to the nameplate rating load of four or more fastened in place
appliances - Answers 75
in outdoor applications _ grounding electrode conductors must not be installed within 18 inches of the
earth - Answers aluminum
_ are not included in calculating receptacle loads for appliances - Answers air conditioning systems
the exact nameplate rating of the clothes dryer, even if less than _ volt amperes should be used in load
calculations - Answers 5000
for a service rated 100-400 amps, the service conductors supplying the entire load associated with a one
family dwelling shall be permitted to have an ampacity not less than _ % of the service rating - Answers
83
service entrance and overhead service conductors shall be arranged so that - Answers water shall not
enter the service raceway or equipment
the radius of the curve of the inner edge of any bend in service entrance cable must be at least _ times
the diameter of the cable - Answers five
type _ cable can be formed in a gooseneck and taped with a self sealing water resistant thermoplastic -
Answers SE
entrance cables must be supported within _ of every raceway or enclosure connection - Answers 12
inches
although not stipulated in the NEC, some local jurisdictions have adopted _ for service conductors -
Answers specific distance requirements
underground service conductors are defined as the underground conductors between the service point
and the _ to the service entrance conductors in a terminal box, meter, or other enclosure, inside or
outside the building wall - Answers first point of connection
type USE cable used for service laterals can _ provided 300.5(D) protection requirements are met -
Answers emerge above ground at outside terminations
overhead service conductors , accessible only to pedestrian traffic, must have a minimum _ vertical
clearance above finished grade, sidewalks, platforms, or projections that will permit personal contact -
Answers 10ft (3.0meters)
conductors must have a vertical clearance of at least _ above the roof surface - Answers 8ft
voltage between overhead conductors does not exceed _ volts - Answers 300
working space illumination shall not be _ - Answers controlled by automatic means
load calculations must be performed in order to determine the _ - Answers size of services and feeders
a feeder is defined as all circuit conductors between the _ containing fuses or breakers that feed branch
circuits - Answers service disconnecting means and the panelboard
_ are not included in the calculated floor area of a dwelling unit - Answers open porches
a scale ruler is used in _ - Answers determining the location of outlets
the _ is not an important piece of information to gather before performing load calculations - Answers
location of circuit breakers
the _, including the strip heat and blower motor, is necessary information for calculating loads - Answers
total volt-ampere load
the lighting load for residential dwelling unit is _ volt-amperes per square foot - Answers 3
the _ for each floor of a one family dwelling shall be computed using the outside dimensions - Answers
floor area
_must be included when calculating a dwelling unit service - Answers small appliance branch circuits
a dwelling unit must have at least _ small appliance branch circuits - Answers 2
each laundry branch circuit is calculated at - Answers no less than 1500 volt amperes
individual household cooking appliances rated more than _ watts (volt-amperes) can be derated using
Table 220.55 demand factors (and all applicable notes) - Answers 1750
no derating is allowed when there are only 1, 2, or 3 appliances - Answers fastened in place
the term _ designates utilization equipment commonly built in standardized types and sizes and
installed as a unit to perform specific functions - Answers appliance
a clothes dryer neutral load on a feeder can be calculated at _ % - Answers 70
multiplying voltage by amperage produces - Answers volt-amperes (VA)
horsepower ratings must be converted to _ before they can be added to the load calculation form -
Answers volt amperes (VA)
the smaller of the two (or more) _ loads can be omitted as long as they are never energised
simultaneously - Answers noncoincident
fur the purpose of the standard method load calculation for a one family dwelling, the terms neutral and
_ are synonymous - Answers grounded
, a demand factor of _ % can be applied to the nameplate rating load of four or more fastened in place
appliances - Answers 75
in outdoor applications _ grounding electrode conductors must not be installed within 18 inches of the
earth - Answers aluminum
_ are not included in calculating receptacle loads for appliances - Answers air conditioning systems
the exact nameplate rating of the clothes dryer, even if less than _ volt amperes should be used in load
calculations - Answers 5000
for a service rated 100-400 amps, the service conductors supplying the entire load associated with a one
family dwelling shall be permitted to have an ampacity not less than _ % of the service rating - Answers
83
service entrance and overhead service conductors shall be arranged so that - Answers water shall not
enter the service raceway or equipment
the radius of the curve of the inner edge of any bend in service entrance cable must be at least _ times
the diameter of the cable - Answers five
type _ cable can be formed in a gooseneck and taped with a self sealing water resistant thermoplastic -
Answers SE
entrance cables must be supported within _ of every raceway or enclosure connection - Answers 12
inches
although not stipulated in the NEC, some local jurisdictions have adopted _ for service conductors -
Answers specific distance requirements
underground service conductors are defined as the underground conductors between the service point
and the _ to the service entrance conductors in a terminal box, meter, or other enclosure, inside or
outside the building wall - Answers first point of connection
type USE cable used for service laterals can _ provided 300.5(D) protection requirements are met -
Answers emerge above ground at outside terminations
overhead service conductors , accessible only to pedestrian traffic, must have a minimum _ vertical
clearance above finished grade, sidewalks, platforms, or projections that will permit personal contact -
Answers 10ft (3.0meters)
conductors must have a vertical clearance of at least _ above the roof surface - Answers 8ft
voltage between overhead conductors does not exceed _ volts - Answers 300
working space illumination shall not be _ - Answers controlled by automatic means
