Which voltage configuration represents a three-phase wye system with 120 V line-to-neutral?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the Washington Master Specialty Electrician – Limited Energy System (06) Exam. Access flashcards and multiple choice questions with detailed explanations to ensure you’re ready for test day!

Multiple Choice

Which voltage configuration represents a three-phase wye system with 120 V line-to-neutral?

Explanation:
In a three-phase wye system, the line-to-neutral voltage is the phase voltage, and the line-to-line voltage is √3 times that value. If the line-to-neutral is 120 V, the line-to-line voltage should be about 208 V (120 × √3 ≈ 208). So 208Y/120 V represents a three-phase wye setup with 120 V to neutral and 208 V between any two lines, matching the required configuration. The other options either show different line-to-neutral voltages (277 V or 347 V) or describe a split-phase service (120/240 V) that isn’t a true three-phase wye.

In a three-phase wye system, the line-to-neutral voltage is the phase voltage, and the line-to-line voltage is √3 times that value. If the line-to-neutral is 120 V, the line-to-line voltage should be about 208 V (120 × √3 ≈ 208).

So 208Y/120 V represents a three-phase wye setup with 120 V to neutral and 208 V between any two lines, matching the required configuration. The other options either show different line-to-neutral voltages (277 V or 347 V) or describe a split-phase service (120/240 V) that isn’t a true three-phase wye.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy