1|Page
NCCER 26401 LOAD CALCULATIONS- FEEDERS AND
SERVICES EXAM NEWEST 2025 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
When calculating the feeder load for a motor control center
supplying several motors, which of the following statements is
correct?
Determine the sum of all motor loads plus 25% of the largest
motor.
Determine the sum of all motor loads plus 125% of the largest
motor.
Determine the sum of all motor loads.
Determine the sum of all motor loads plus 30% of the largest
motor. - ANSWER-Determine the sum of all motor loads plus
25% of the largest motor.
NEC Section _____ permits an alternative method for
calculating loads in multi-family dwellings. - ANSWER-NEC
Section 220.84
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After calculating the first 3,000VA of the general lighting and
small appliance load at 100% for a multi-family dwelling, what
is the demand factor that may be applied to the next 117,000VA?
A. 5%
B. 25%
C. 35%
D. 50% - ANSWER-35%
According to NEC Table 220.42, the first 3,000VA (out of
120,000VA) must be calculated at 100%, and the next
117,000VA (up to 120,000VA) has a demand factor of 35%
applied to it.
Using the 10' tap rule, what size copper THWN conductor is
required for a tap from a 400A, 480V, 3Phase feeder to serve a
150A load?
1/0
2/0
No. 1
No. 2 - ANSWER-No. 1
Refer to NEC Table 220.42 to verify your answer. In multi-
family dwellings, a demand factor of _____ is applied to any
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excess general lighting and small appliance load over
120,000VA, after the first 3,000VA has been calculated at 100%
and the next 117,000VA has been calculated at a demand factor
of 35%. - ANSWER-25%
Feeder - ANSWER-All circuit conductors between the service
equipment, the source of separately derived system, or other
supply source and the final branch circuit overcurrent device.
True or False. NEC Section 220.44 permits both general-
purpose receptacles calculated at 180VA per outlet and fixed
multi-outlet assemblies to be adjusted according to demand
factors listed in NEC Tables 220.42 and 220.44. - ANSWER-
True.
What is the minimum general lighting load, in VA per square
foot, required by the NEC for a store?
3
2-1/2
5
2 - ANSWER-3
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The load for a branch circuit installed for the supply of exterior
signs or outline lighting must be computed at a minimum of
_____. - ANSWER-NEC Section 220.14(F) requires a minimum
of 1,200VA.
What is the minimum general lighting load, in VA per square
foot, required by the NEC for an office building?
3-1/2
4-1/2
2
3 - ANSWER-3-1/2
A kitchen equipment load is subject to the application of a
_____ demand factor. - ANSWER-The kitchen equipment load
is subject to a 65% demand factor.
Service - ANSWER-The conductors and equipment for
delivering electric energy from the serving utility to the wiring
system of the premises served
True or False. The receptacle loads in guest rooms in a motel are
included in the general lighting load calculations. - ANSWER-
True.
NCCER 26401 LOAD CALCULATIONS- FEEDERS AND
SERVICES EXAM NEWEST 2025 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
When calculating the feeder load for a motor control center
supplying several motors, which of the following statements is
correct?
Determine the sum of all motor loads plus 25% of the largest
motor.
Determine the sum of all motor loads plus 125% of the largest
motor.
Determine the sum of all motor loads.
Determine the sum of all motor loads plus 30% of the largest
motor. - ANSWER-Determine the sum of all motor loads plus
25% of the largest motor.
NEC Section _____ permits an alternative method for
calculating loads in multi-family dwellings. - ANSWER-NEC
Section 220.84
,2|Page
After calculating the first 3,000VA of the general lighting and
small appliance load at 100% for a multi-family dwelling, what
is the demand factor that may be applied to the next 117,000VA?
A. 5%
B. 25%
C. 35%
D. 50% - ANSWER-35%
According to NEC Table 220.42, the first 3,000VA (out of
120,000VA) must be calculated at 100%, and the next
117,000VA (up to 120,000VA) has a demand factor of 35%
applied to it.
Using the 10' tap rule, what size copper THWN conductor is
required for a tap from a 400A, 480V, 3Phase feeder to serve a
150A load?
1/0
2/0
No. 1
No. 2 - ANSWER-No. 1
Refer to NEC Table 220.42 to verify your answer. In multi-
family dwellings, a demand factor of _____ is applied to any
,3|Page
excess general lighting and small appliance load over
120,000VA, after the first 3,000VA has been calculated at 100%
and the next 117,000VA has been calculated at a demand factor
of 35%. - ANSWER-25%
Feeder - ANSWER-All circuit conductors between the service
equipment, the source of separately derived system, or other
supply source and the final branch circuit overcurrent device.
True or False. NEC Section 220.44 permits both general-
purpose receptacles calculated at 180VA per outlet and fixed
multi-outlet assemblies to be adjusted according to demand
factors listed in NEC Tables 220.42 and 220.44. - ANSWER-
True.
What is the minimum general lighting load, in VA per square
foot, required by the NEC for a store?
3
2-1/2
5
2 - ANSWER-3
, 4|Page
The load for a branch circuit installed for the supply of exterior
signs or outline lighting must be computed at a minimum of
_____. - ANSWER-NEC Section 220.14(F) requires a minimum
of 1,200VA.
What is the minimum general lighting load, in VA per square
foot, required by the NEC for an office building?
3-1/2
4-1/2
2
3 - ANSWER-3-1/2
A kitchen equipment load is subject to the application of a
_____ demand factor. - ANSWER-The kitchen equipment load
is subject to a 65% demand factor.
Service - ANSWER-The conductors and equipment for
delivering electric energy from the serving utility to the wiring
system of the premises served
True or False. The receptacle loads in guest rooms in a motel are
included in the general lighting load calculations. - ANSWER-
True.
