Article 220 - Branch-circuit, Feeder, and Service Load Calculations (QUARTER 2)

When calculations in Article 220 result in a fraction of an ampere that is less than _____, such fractions can be dropped.

0.50

Sign and outline lighting outlets are to be calculated at a minimum of _____ VA for each required branch circuit specified in 600.5(A).

1,200

Feeder and service loads for fixed electric space-heating loads shall be calculated at _____ percent of the total connected load.

100

For other than dwelling occupancies, banks, or office buildings, each receptacle outlet shall be calculated at not less than _____ VA.

180

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.

2

A demand factor of _____ percent applies to a multifamily dwelling with ten units if the optional calculation method is used.

43

Using the standard load calculation method, the feeder demand factor for five household clothes dryers is _____ percent.

85

To determine the feeder calculated load for ten 3 kW household cooking appliances, use _____ of Table 220.55

Column A

Show window loads are permitted to be calculated at 180 VA per linear ft of a show window. True or False

False

The demand factors of Table 220.56 apply to space-heating, ventilating, or air-conditioning equipment. True or False

False

Where there are two or more air-conditioning units served by the same feeder, it shall be permissible to apply a dwelling unit appliance load demand factor of 75 percent. True or False

False

Table 220.56 may be applied to determine the load for thermostatically controlled or intermittently used _____ and other kitchen equipment in a commercial kitchen.

commercial electric cooking equipment, dishwasher booster heaters, and water heaters (all of these)

When calculating a feeder or service load for existing installations, if the maximum demand data for a 1-year period is not available, the calculated load shall be permitted to be based on the maximum demand (the _____ kilowatts reached and maintained for a 15-minute interval continuously recorded over a minimum 30-day period using a recording ammeter or power meter connected to the highest loaded phase of the feeder or service, based on the initial loading at the start of the recording.

highest average

Where it is unlikely that two or more noncoincident loads will be in use simultaneously, only the _____ the loads used at one time is required to be used in computing the total load to a feeder.

largest of

There shall be no reduction in the size of the neutral or grounded conductor on _____ loads supplied from a 4-wire, wye-connected, three-phase system.

nonlinear

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.

the total ampere

The 3 VA per sq ft general lighting load for dwelling units does not include _____.

unused or unfinished spaces not adaptable for future use

The minimum feeder load for show-window lighting is _____ VA per linear foot.

200

Article _____ provides requirements for calculating branch-circuit, feeder, and service loads.

220

The feeder/service calculated load for a multifamily dwelling containing nine 12 kW ranges is _____.

24000W

Where two dwelling units are supplied by a single feeder and the calculated load under Part III of this article exceeds that for _____ identical units calculated under 220.84, the lesser of the two loads is permitted to be used.

3

A dwelling unit containing two 120V laundry branch circuits has a calculated load of _____ VA for the laundry circuits.

3000

Under the optional method for calculating a single-family dwelling service, general loads beyond the initial 10 kVA are assessed at a _____ percent demand factor.

40

A dwelling unit containing three 120V small-appliance branch circuits has a calculated load of _____ VA for the small-appliance circuits.

4500

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.

5

The load for electric clothes dryers in a dwelling unit shall be _____ or the nameplate rating, whichever is larger, per dryer.

5000W

A feeder or service supplying household electric ranges, wall-mounted ovens, counter-mounted cooking units, and electric dryers, where the maximum unbalanced load has been determined in accordance with Table 220.55 for ranges and Table 220.54 for dryers shall be permitted to have an additional demand factor of _____ percent applied.

70

The 125 percent 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. True or False

True

The 3 VA per sq ft general lighting load for dwelling units includes general-use receptacles and lighting outlets. True or False

True

Unless otherwise specified, for purposes of calculating branch-circuit and feeder loads, nominal system voltages of 120, 120/240, 208Y/120, 208Y/120, 240, 347, 480Y/277, 480, 600Y/347, and 600 volts are to be used. True or False

True

Where a motor is part of the noncoincident load and it is not the largest of the noncoincident loads, 125 percent of the motor load shall be used in the calculation if it is the largest motor.

True

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 _____.

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, continuous load multiplier of 125 percent is applied (all of these)

The dwelling unit appliance load demand factor of 75 percent for four or more appliances shall not apply to _____.

electric cooking equipment, clothes dryers, and space heating equipment (all of these)

Where the lighting load for a non-dwelling 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 _____.

energy code

When sizing a feeder for the fixed appliance loads in dwelling units, a demand factor of 75 percent of the total nameplate ratings can be applied if there are _____ or more appliances fastened in place on the same feeder.

four

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.

is

When applying the demand factors of Table 220.56, the feeder or service demand load shall not be less than the sum of the _____.

largest two kitchen equipment loads