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20UNEC1 Article 220- Branch-Circuit, Feeder, And Service Load Calculations: Q&A
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20UNEC1 Article 220- Branch-Circuit, Feeder, And Service Load Calculations: Q&A
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20UNEC1 Article 220- Branch-Circuit, Feeder, AndService Load Calculations: Q&A
Unless otherwise specified, for purposes of calculating branch-circuit and
feeder loads, nominal system voltages of __________________ and 600 volts are to
be used. Right Ans - 120, 120/240, 208Y/120, 240, 347, 480Y/277, 480,
600Y/347
When calculations in Article 220 result in a fraction of an ampere that is less
than _____, such fractions can be dropped. Right Ans - 0.50
The 3 VA per sq ft general lighting load for dwelling units does not include
_____. Right Ans - unused or unfinished spaces not adaptable for future use
The 125 percent multiplier for a continuous load as specified in 210.20(A)
_____ included when using the unit loads in table 220.12 for calculating the
minimum lighting load for a specified occupancy. Right Ans - is
The _____________ multiplier for a continuous load as specified in 210.20(A) is
included when using the unit loads in table 220.12 for calculating the
minimum lighting load for auditoriums, lodge rooms, banks, and stores
Right Ans - 125 percent
Where the lighting load for a nondwelling building is designed and
constructed to comply with an energy code adopted by the local authority, the
lighting load shall be permitted to be calculated using the unit values specified
in the _____. Right Ans - energy code
Where a building is designed and constructed to comply with an energy code
adopted by the local authority, the lighting load is permitted to be calculated
using the unit values specified in the energy code if a _____. Right Ans -
continuous power monitoring system is installed, power monitoring system is
installed with alarm values to alert personnel when the lighting load exceeds
the energy code values and can provide to automatically reduce the connected
load, and/or continuous load multiplier of 125 percent is applied.
Sign and outline lighting outlets are to be calculated at a minimum of _____ VA
for each required branch circuit specified in 600.5(A). Right Ans - 1,200
, Show window loads are permitted to be calculated at 180 VA per linear ft of
show window. Right Ans - False
Where fixed multioutlet assemblies are used in other than dwelling units or
the guest rooms of hotels or motels, each _____ ft or fraction thereof of each
separate and continuous length shall be considered as one outlet of not less
than 180 VA where appliances are unlikely to be used simultaneously.
Right Ans - 5
For other than dwelling occupancies, banks, or office buildings, each
receptacle outlet shall be calculated at not less than _____ VA. Right Ans -
180
The 3 VA per sq ft general lighting load for dwelling units includes __________.
Right Ans - general-use receptacles and lighting outlets.
Branch circuits that supply lighting units that have ballasts, transformers,
autotransformers, or LED drivers shall have the calculated load based on _____
rating of the units, not to the total wattage of the lamps. Right Ans - the
total ampere
The minimum feeder load for show-window lighting is _____ VA per linear foot.
Right Ans - 200
For other than dwelling units or guest rooms of hotels or motels, the feeder
and service calculation for track lighting shall be calculated at 150 VA for
every _____ ft of lighting track or fraction thereof unless the track is supplied
through a device that limits the current to the track. Right Ans - 2
Feeder and service loads for fixed electric space-heating loads shall be
calculated at _____ percent of the total connected load. Right Ans - 100
A dwelling unit containing three 120V small-appliance branch circuits has a
calculated load of _____ VA for the small-appliance circuits. Right Ans -
4,500
A dwelling unit containing two 120V laundry branch circuits has a calculated
load of _____ VA for the laundry circuits. Right Ans - 3,000
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