Dear All

please ive me ur ideas...

What is the major diff between cu conductors and Al
conductors ?

Answer Posted / m s rana

Cu - Good conductor higher current rating
high current rating
less power losses
1 sqmm of cu can take current upto 4.5 amp
costly conductor
more heat resistive
stronger than Al

Al good conductor but not then cu
low current rating
more power losses than cu condctor
less heat resistive

Is This Answer Correct ?    2 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

1845


What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

683


how the phase convertor changes the no. of phases

1550


Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

1531


What is the difference between diode and a transistor in terms of the direction of current flow?

1686






How to choose size of the cable w.r.to current carrying capacity ...

1689


List the power rating of any 5 important electrical appliances used in houses.

1575


Please define ampere?

681


Why an ac systems are preferred over dc systems?

640


why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

1399


which of the following elements is not present in stainless steel

2028


my question is how to answer the question "you are from b.tech eee background and why do you want to go for banking

890


where solid grounding and where grounding through ngr done and why?

2099


I want definition for ABT Meter (Availability Based tariff) ?

1530


I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

1785