Q1. what are the advantages of 3 phase over single phase...

<< Back to: Electrical Wiring FAQ (Part 1 of 2)

Question by kunal
Submitted on 10/10/2003
Related FAQ: Electrical Wiring FAQ (Part 1 of 2)
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Q1. what are the advantages of 3 phase over single phase transmission & use? Q2. how are the line voltage/currents related to phase voltage & phase null in a 3 phase start system? Q3. what are the different wiring systems? Q4. in which case do you use surface conduit wiring? Q5. what are the reasons for null the power circuit from the lighting circuit? Q6. why are insulation tests made between Conductors and Earth? Q7. why is insulation test made between conductors? Q8. why is earth continuity test made? Q9. what is the necessity for earthing in an electrical installation? Q10. what is power factor? what is its importance?how are apparent power, reactive power & active power related? Q11. what is the effect of reactive power in an electrical circuit? Q12. how will you determine the size of the wires? what does S.W.G. stand for? what does A.W.G. stand for? Q13. where is the path for the unbalanced load current flow in a star null? Q14. what are the advantages of power transmission in STAR system over the DELTA system? Q15. what is the use of the starter? how does it function? Q16. what is the use of the choke? Q17. how does the fluorescent lighting system works? Q18. how does the electromagnetic contactor work? Q19. what are NO & NC contacts in a relay or contactor? Q20. what are HRC fuses? what is their use? how are they different from normal fuses? Q21. what is the color used in Plug wiring & what are the points? what are voltages between 3 wirings in a plug?> Q22. how many strands are there in the wire being used by you in the lab? what is the diameter of each strand & what is the total area of the wire without insulation?

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<< Back to: Electrical Wiring FAQ (Part 1 of 2)

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Answer by jo
Submitted on 11/15/2003
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I suggest you get the answers from the same text book you got the questions from.

Answer by tools
Submitted on 5/1/2004
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you really think there's room in this little box to type all the answers to your questions?? geesh

Answer by thgfhfg
Submitted on 7/8/2004
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testing fdsk dskljglkd jglkdsf ;fds g

Answer by kells
Submitted on 1/15/2005
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Did you ever find out the answer to question 1 as I would love to know myself!!

Answer by RAJ
Submitted on 2/2/2005
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Q.21. THE COLOUR OF PLUG WIRE ARE RED, BLACK & GREEN. RED INDICATES PHASE WIRE BLACK INDICATES NEUTRAL WIRE GREEN INDICATES EARTH WIRE. VOLTAGE BETWEEN PHASE & NEUTRAL IS 230V PHASE EARTH IS 231V(AS EARTH CONDUCTIVITY) NEUTRAL AND EARTH IS 1.92V

Answer by Bongjovi
Submitted on 5/11/2005
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I don't know

Answer by nisa
Submitted on 5/23/2006
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bagaimana ujian rintangan penebat ke atas sistem pendawaian 3 fasa dilakukan

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