1|Page
Load Calculation Feeders And Services
Level 4 Module 1 |Comprehensive Q&A
For Certification Success
When calculating the service requirement for a particular building, the step is to -
correct-answer -determine the floor area of the building
What is the feeder ampacity for a three-phase, 120/208V subpanel with a
connected load of 84,563VA? - correct-answer -235A
Which part of a residential lighting and small appliance load must be rated at 35%
for servives - correct-answer -
An optional method for determining feeder to schools is covered in - correct-
answer -NEC® Section 220.86
Refer to the figure above. What is the total load of a feeder serving four 230V
motors rated 5hp, 15hp, 20hp, and 40hp? - correct-answer -241.2
, 2|Page
Refer to the figure above. Calculate the minimum ampacity for a feeder serving
the following 460V motor: 10hp, 20hp, and 30hp. - correct-answer -91A
Refer to the figure above. What is the total load a feeder serving four 2hp motors,
three 5hp motors, one 15hp motor, and one 25 hp motor? All motors are 208V. -
correct-answer -219.8 A
NEC Section ——————-permits an alternative method for calculating loads in
multi-family dwelling. - correct-answer -220.84
The smallest size locking and grounding type receptacle that may be used to
provide shore power for boats is - correct-answer -30A
33. When the over current protection for a conductor is located on the load end
rather than the supply side of a conductor it is considered to be on - correct-
answer -Tap conductor
What is the demand factor allowed by the NEC® for calculating the neutral
conductor size for electric range load? - correct-answer -70%
Load Calculation Feeders And Services
Level 4 Module 1 |Comprehensive Q&A
For Certification Success
When calculating the service requirement for a particular building, the step is to -
correct-answer -determine the floor area of the building
What is the feeder ampacity for a three-phase, 120/208V subpanel with a
connected load of 84,563VA? - correct-answer -235A
Which part of a residential lighting and small appliance load must be rated at 35%
for servives - correct-answer -
An optional method for determining feeder to schools is covered in - correct-
answer -NEC® Section 220.86
Refer to the figure above. What is the total load of a feeder serving four 230V
motors rated 5hp, 15hp, 20hp, and 40hp? - correct-answer -241.2
, 2|Page
Refer to the figure above. Calculate the minimum ampacity for a feeder serving
the following 460V motor: 10hp, 20hp, and 30hp. - correct-answer -91A
Refer to the figure above. What is the total load a feeder serving four 2hp motors,
three 5hp motors, one 15hp motor, and one 25 hp motor? All motors are 208V. -
correct-answer -219.8 A
NEC Section ——————-permits an alternative method for calculating loads in
multi-family dwelling. - correct-answer -220.84
The smallest size locking and grounding type receptacle that may be used to
provide shore power for boats is - correct-answer -30A
33. When the over current protection for a conductor is located on the load end
rather than the supply side of a conductor it is considered to be on - correct-
answer -Tap conductor
What is the demand factor allowed by the NEC® for calculating the neutral
conductor size for electric range load? - correct-answer -70%
