Moderate
A 3-phase 4 wire system is commonly used on________________?
Correct answer: D. secondary distribution
- A. primary transmission
- B. secondary transmission
- C. primary distribution
- D. secondary distribution
Explanation
A three-phase four-wire arrangement provides three phase conductors plus a neutral, allowing both three-phase loads and single-phase consumer loads. This is why it is commonly used in secondary distribution.
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