ELECTRICAL LEVEL 3 MODULE 1 LOAD
CALCULATIONS AND BRANCH FEEDER CIRCUITS
(ACTUAL 2025/2026) QUESTION AND VERIFIED
ANSWERS
What is the required circuit ampacity of a
noncontinuous, single-phase load of 8.5kW at
277V?
30.69A
What is the required circuit ampacity for a
noncontinuous, three-phase load of 6kW at 208V?
16.65A
What is the total ampacity for a 120V branch circuit
consisting of four duplex receptacles rated
noncontinuous duty and six duplex receptacles rated
continuous duty?
17.25A
What is the total load required by the NEC® for two
appliance branch circuits plus a laundry branch
circuit?
4,500VA
, 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? 5.14V
5.14V
What size copper conductor would be required for a
240V, 1Ø circuit supplying a noncontinuous load of
27.5A at a distance of 145', and a maximum voltage
drop of 3%?
No. 10
When connected to 15A or 20A multi-outlet general-
purpose branch circuits, which of the following shall
not exceed 50% of the branch circuit ampere rating?
Fastened-in-place utilization equipment
According to the NEC®, the ampacity of branch circuit
conductors must be derated when there are more than
how many current-carrying conductors in a raceway?
3
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)?
225%
CALCULATIONS AND BRANCH FEEDER CIRCUITS
(ACTUAL 2025/2026) QUESTION AND VERIFIED
ANSWERS
What is the required circuit ampacity of a
noncontinuous, single-phase load of 8.5kW at
277V?
30.69A
What is the required circuit ampacity for a
noncontinuous, three-phase load of 6kW at 208V?
16.65A
What is the total ampacity for a 120V branch circuit
consisting of four duplex receptacles rated
noncontinuous duty and six duplex receptacles rated
continuous duty?
17.25A
What is the total load required by the NEC® for two
appliance branch circuits plus a laundry branch
circuit?
4,500VA
, 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? 5.14V
5.14V
What size copper conductor would be required for a
240V, 1Ø circuit supplying a noncontinuous load of
27.5A at a distance of 145', and a maximum voltage
drop of 3%?
No. 10
When connected to 15A or 20A multi-outlet general-
purpose branch circuits, which of the following shall
not exceed 50% of the branch circuit ampere rating?
Fastened-in-place utilization equipment
According to the NEC®, the ampacity of branch circuit
conductors must be derated when there are more than
how many current-carrying conductors in a raceway?
3
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)?
225%
