Question

17. Determine the minimum size THWN conductors required for the secondary full-load current of the following transformer: 25 kVA, 440/120/208-volt, 3-phase, 4-wire. The transformer secondary conductors will be less than 10 feet in length and installed in flexible metal conduit. The load is not a continuous load. O a. 6 AWG O b. 4 AWG O c. 2 AWG O d. 1/0 AWG

          17. Determine the minimum size THWN conductors required for the secondary full-load current of the following transformer: 25 kVA, 440/120/208-volt, 3-phase, 4-wire. The transformer secondary conductors will be less than 10 feet in length and installed in flexible metal conduit. The load is not a continuous load.

O a. 6 AWG
O b. 4 AWG
O c. 2 AWG
O d. 1/0 AWG

17. Determine the minimum size THWN conductors required for the secondary full-load current of the following transformer: 25 kVA, 440/120/208-volt, 3-phase, 4-wire. The transformer secondary conductors will be less than 10 feet in length and installed in flexible metal conduit. The load is not a continuous load.

O a. 6 AWG
O b. 4 AWG
O c. 2 AWG
O d. 1/0 AWG

Added by James J.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Hubert Agamasu

01/27/2024

Step 1

The formula for this is: I = P / (1.732 * V) where: I = current P = power (in kVA) V = voltage In this case, P = 25 kVA and V = 208 volts (since we're looking at the secondary side of the transformer). So: I = 25 / (1.732 * 208) = 69.3 Amps Show more…

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Determine the minimum size THWN conductors required for the secondary full-load current of the following transformer: 25 kVA, 440/120/208-volt, 3-phase, 4-wire. The transformer secondary conductors will be less than 10 feet in length and installed in flexible metal conduit. The load is not a continuous load. a. 6 AWG b. 4 AWG c. 2 AWG d. 1/0 AWG