Electrical Level 3 Module 1 Load
Calculations and Branch Feeder Circuits
Questions and complete answers
What is the demand load for one household range with a nameplate rating of 11.75kW, 240V, 1Ø? -
Answer: 8kW
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? 13.75A - Answer: 13.75A
What is the load center distance for a 208V, four-wire, three-phase branch circuit with fixed
noncontinuous loads from the source of 60A at 45', 40A at 60', 30A at 75', and 25A at 100' - Answer:
63.55'
What is the load center length for a branch circuit consisting of noncontinuous loads of 125A at 80', 75A
at 110', and 50A at 100'? - Answer: 93'
What is the load center length for a branch circuit with noncontinuous loads of 20A at 60' and 50A at
125'? - Answer: 106.43'
What is the load for 55' of show window using the linear foot method? - Answer: 13,750VA
What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3Ø? - Answer:
65A
What is the required circuit ampacity for a noncontinuous, three-phase load of 6kW at 208V? - Answer:
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? - Answer: 17.25A
Calculations and Branch Feeder Circuits
Questions and complete answers
What is the demand load for one household range with a nameplate rating of 11.75kW, 240V, 1Ø? -
Answer: 8kW
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? 13.75A - Answer: 13.75A
What is the load center distance for a 208V, four-wire, three-phase branch circuit with fixed
noncontinuous loads from the source of 60A at 45', 40A at 60', 30A at 75', and 25A at 100' - Answer:
63.55'
What is the load center length for a branch circuit consisting of noncontinuous loads of 125A at 80', 75A
at 110', and 50A at 100'? - Answer: 93'
What is the load center length for a branch circuit with noncontinuous loads of 20A at 60' and 50A at
125'? - Answer: 106.43'
What is the load for 55' of show window using the linear foot method? - Answer: 13,750VA
What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3Ø? - Answer:
65A
What is the required circuit ampacity for a noncontinuous, three-phase load of 6kW at 208V? - Answer:
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? - Answer: 17.25A
