Lesson 10 Branch Circuit Feeder & Service Calc 2

Where continuous and noncontinuous loads are supplied, the computed load shall not be less than _____. Select one: a.125 percent of the continuous load plus 100 percent of the noncontinuous load b.100 percent of the noncontinuous load plus 80 percent of the continuous load c.80 percent of the branch circuit rating d.125 percent of the computed load

a.125 percent of the continuous load plus 100 percent of the noncontinuous load (210.20)

The branch circuit load for one 6-kW cook top and two 6-kW ovens on one branch circuit is _____ kW. Select one: a.18 b.9.9 c.7.8 d.none of the above

a.18

A feeder load of not less than ____ per linear foot must be included for show window lighting. Select one: a.200 volt-amperes b.100 volt-amperes c.180 volt-amperes d.2 amperes

a.200 volt-amperes

Table 220.55 demand factors apply only to household cooking appliances over ___ kW. Select one: a.3.5 b.1.75 c.2 d.8

b.1.75

Generally, feeder loads for fixed electric space heating are required to be computed at ____ percent of the total connected load. Select one: a.80 b.100 c.125 d.150

b.100

For household cooking appliances of equal rating, 12.5 through 27.49 kW, the feeder demand loads are calculated according to Table 220.55, Column C and adjusted ____ percent for each kW, or major fraction (.5 kW), that the average cooking appliance exceeds 12 kW. Select one: a.2 b.3 c.5 d.10

c.5

The minimum branch circuit rating for a 240-volt, single-phase, 21.85-kW dwelling range is ____. Select one: a.80 b.125 c.50 d.90

c.50

The demand load for a number of 5.5-kW dryers in dwelling units is ____. Select one: a.5,000 watts times the number of dryers b.the nameplate rating times the demand in Table 220.54 for the number of dryers times the demand in Table 220.54 for the number of dryers c.the larger of 5,000 watts or the nameplate rating times the number of dryers times the demand factor in Table 220.54 d.5000 watts times the demand in Table 220.54 for the number of dryers

c.the larger of 5,000 watts or the nameplate rating times the number of dryers times the demand factor in Table 220.54

The lighting load demand factor for office buildings is ____. Select one: a.the first 12,500 VA or less at 100% and the balance at 50% b.the first 50,000 VA or less at 40% and the balance at 30% c.75 percent d.100 percent

d.100 percent (table 220.12)

The demand load for 100 receptacles in a commercial building is ___ VA. Select one: a.18,000 b.10,000 c.8,000 d.14,000

d.14,000 (table 220.44 demand factors 180x100=18kva the first 10 kva is at 100% remainder is 50% )

The minimum neutral load feeder load for two 12-kW household electric ranges and two 5-kW household electric clothes dryers is ____ kW. Select one: a.34 b.26 c.21 d.14.7

d.14.7

Feeder loads for dwelling lighting must include the first ____. Select one: a.3000 VA at 100 percent, the next 117,000 VA at 35 percent and the remainder at 25 percent b.3500 VA at 100 percent, the next 120,000 VA at 35 percent and the remainder at 25 percent c.1500 at VA 100 percent, the next 120,000 VA at 40 percent and the remainder at 25 percent d.10 kVA at 100 percent, the next 120,000 kVA at 35 percent and the remainder at 25 percent

a.3000 VA at 100 percent, the next 117,000 VA at 35 percent and the remainder at 25 percent (table 220.42 Lighting Load Demand Factors)

The minimum neutral feeder or service load for household electric ranges, wall-mounted ovens and counter-mounted cooking units may be considered as ____ percent of the load on the ungrounded conductors. Select one: a.50 b.70 c.100 d.125

b.70

Where permitted, the portion of feeder neutral loads of AC systems in excess of 200 amperes may be reduced to ____ percent. Select one: a.30 b.70 c.40 d.can't be reduced

b.70

Where it is unlikely that two ____ loads will be used simultaneously, it is permissible to omit the smaller of the two loads when computing the total feeder or service load. Select one: a.similar b.noncoincident c.coincident d.cord- and plug-connected

b.noncoincident

When calculating feeder or service loads for commercial occupancies, it is not permissible to apply a demand factor to ___. Select one: a.a single range b.ventilating equipment c.intermittent use appliances d.3 or more units of cooking equipment

b.ventilating equipment

The demand load for an 18-kW range in a dwelling unit is ___ kW. Select one: a.8 b.8.8 c.10.4 d.18

c.10.4 (table 220.55 read notes)

Feeder loads for dwelling lighting are calculated at ____ VA per square foot. Select one: a.2 b.2.5 c.3 d.5

c.3

The demand load for one wall-mounted oven or counter-mounted cooking unit rated 6-kW is ___ kW. Select one: a.8 b.6 c.4.8 d.none of the above

c.4.8 (table 220.55 read notes)

Feeder loads for dwelling ____ are computed at 1500 VA for each circuit required by Sections 210.11(C)(1) and 210.11(C)(2). Select one: a.small appliance circuits b.general lighting receptacle circuits c.laundry circuits d.small appliance and laundry circuits

d.small appliance and laundry circuits