Please be as detailed as possible and write legibly, thank you. A Fully loaded 1
ID: 1716547 • Letter: P
Question
Please be as detailed as possible and write legibly, thank you.
A Fully loaded 15kVA, 1ph, 480V-120/240V transformer is connected to a distribution panelboard with 2-pole circuit breaker via a feeder of 185 feet length; average power factor of the load at the transformer is 0.85 LAG. Calculate the voltage drop and the percentage voltage drop w.r.t the nominal transformer voltage (480V) for feeder cases of following type of cables:
i. #8AWG, Cu
ii. #8AWG, Al
iii. #4AWG, Cu
iv. #4AWG, Al
Note: Use NEC Table 8 and Table 9 data for all calculations.
Explanation / Answer
Voltage drop :0.25 , %of voltage drop 25%