WorksheetsNCCER Electrical 3 Module 1
Total questions: 25
Worksheet time: 13mins
Refer to the 2020 edition of the NEC®. What is the current-carrying capacity for No. 6
THWN aluminum conductors in conduit run through an ambient temperature of 38°C?
41A
44A
45.5A
50A
Refer to the 2020 edition of the NEC®. Continuous loads are calculated at what percentage
of the maximum current rating of the overcurrent device?
75%
80%
90%
100%
Refer to the 2020 edition of the NEC®. What is the voltage drop for a 120V, single-phase,
two-wire branch circuit, 100' long, using copper conductors of 6,530 circular mils with a
noncontinuous load of 13A?
3.28V
4.01V
5.14V
6.24V
Refer to the 2020 edition of the NEC®. The load center length for a 208V, four-wire, three-
phase branch circuit with fixed noncontinuous loads of 60A at 45' from the source, 40A at 60'
from the source, 30A at 75' from the source, and 25A at 100' from the source is _____.
60.40'
63.55'
71.72'
85.21'
Refer to the 2020 edition of the NEC®. What is the required circuit ampacity of a
noncontinuous, single-phase load of 8.5kW at 277V?
17.32A
25.25A
28.15A
30.69A
Refer to the 2020 edition of the NEC®. The load center length for a branch circuit with
noncontinuous loads of 125A at 80' from the source, 75A at 110' from the source, and 50A at
100' from the source is _____.
59'
78'
87'
93'
Refer to the 2020 edition of the NEC®. What is the lighting load on a 120V circuit for six
100W incandescent lights and four fluorescent fixtures with a ballast rating of 1.5A, all
operating continuously for 8 hours per day?
10.50A
13.75A
15.5A
17.60A
Refer to the 2020 edition of the NEC®. What is the total ampacity for a 120V branch circuit
consisting of four duplex receptacles rated noncontinuous duty and four duplex receptacles
rated continuous duty?
13.5A
16.5A
17.5A
18.5A
Refer to the 2020 edition of the NEC®. What is the feeder load (in VA) for four small
appliance branch circuits?
1,500VA
1,800VA
2,400VA
6,000VA
Refer to the 2020 edition of the NEC®. What is the feeder load (in VA) for the minimum
number of small appliance branch circuits required in a residential kitchen?
1,500VA
2,400VA
3,000VA
6,000VA
Refer to the 2020 edition of the NEC®. What is the total load required by the NEC® for four
appliance branch circuits plus a laundry branch circuit?
1,500VA
3,000VA
4,500VA
7,500VA
Refer to the 2020 edition of the NEC®. What is the demand load for one household range
with a nameplate rating of 10kW, 240V, 1Ø?
8kW
9kW
12kW
19kW
Refer to the 2020 edition of the NEC®. What is the required branch circuit ampacity of a
water heater with a nameplate rating of 7,200VA at 240V?
30A
37.5A
40A
42.5A
Refer to the 2020 edition of the NEC®. What is the demand factor for three commercial
ranges?
70%
80%
90%
100%
Refer to the 2020 edition of the NEC®. When space heating equipment uses electric
resistance heating elements, protection for the resistance elements must NOT exceed _____.
30A
40A
60A
80A
Refer to the 2020 edition of the NEC®. Air conditioning overcurrent protective devices can
never exceed what percentage of the motor-rated load current or the branch circuit selection
current (whichever is greater)?
150%
175%
225%
300%
Refer to the 2020 edition of the NEC®. The total load of show windows must be calculated
at NOT less than _____.
100VA per linear foot of show window
150VA per linear foot of show window
200VA per linear foot of show window
300VA per linear foot of show window
Refer to the 2020 edition of the NEC®. The load for 30' of multi-outlet assembly used to
supply several loads simultaneously is _____.
900VA
1,800VA
3,600VA
5,400VA
Refer to the 2020 edition of the NEC®. A sign load CANNOT exceed _____.
50% of the branch circuit rating
60% of the branch circuit rating
80% of the branch circuit rating
100% of the branch circuit rating
Refer to the 2020 edition of the NEC®. A noncontinuous load of three 120V outlets for
heavy-duty lamp holders would have a load of _____.
1,200VA
1,800VA
2,400VA
3,000VA
Refer to the 2020 edition of the NEC®. What is the MINIMUM ampacity for the branch
circuit conductors for a single-phase motor rated at 2hp, 230V?
12A
15A
18A
20A
Refer to the 2020 edition of the NEC®. The demand load for four pieces of commercial
cooking equipment is _____.
65%
70%
80%
90%
Refer to the 2020 edition of the NEC®. The MAXIMUM size dual-element fuse for a 40hp,
3Ø, 460V motor with a Design Letter D is _____.
60A
80A
100A
120A
Refer to the 2020 edition of the NEC®. What is the motor full-load current for an induction-
type motor with a nameplate rating of 30hp, 460V, 3Ø?
40A
65A
81A
130A
Refer to the 2020 edition of the NEC®. For resistance welders, the rating for the overcurrent
protection device should NOT exceed _____.
125% of the primary current rating of the welder
185% of the primary current rating of the welder
200% of the primary current rating of the welder
300% of the primary current rating of the welder
