Need some answers to the questions below 1. Can a 208 volt , single phase motor

Question

Need some answers to the questions below

1. Can a 208 volt , single phase motor operate on a 120/208 volt , 3 phase 4 wire system

2. A #4/0 copper wire in 43 degree C ambient temperature has an ampacity of 189 Amepere . True or False

3. A load of 300 Amperes lasting atleast 3 hours will probable not melt the insulation of a #3 copper conductr. True or False

4. What conductor is connected between the neutral bar and grounding electrode

5. Under what conditions is the neutral conductor in a 120/208 volt or 277/480 volt system considered a current carrying conductor

Explanation / Answer

1.NO bcoz 120/208 are line values of 3 phase 4 wire system. For this system 1-phase voltage will be less than 208V on which motor can't operate

2.False

3.False

4.copper clad or galvanized steel conductor

5 under any ground failure or earth failure conditions

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