How do you select a cable size(cu and Al) for a particular load

Answer Posted / gnd kumaran

First calculate the load current.
Then select the cable according to the current carrying
capacity.[To know the current carrying capacity, refer
cables catalog]


Load Current X Length of the cable X Voltage drop per Amps
per Meter [in milli volts]/ 1000
now we will get voltage drop
If voltage drop is below 3- 5 percentage, you can choose
the above cable, if it is more than 3-5 percentage, go to
next higher size and repeat the calculation.

Is This Answer Correct ?    3 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.

2882


11 kv input, 66 kv input advantages

941


Define cut-off rate?

656


Why star delta starter is preferred with induction motor?

638


What is the limitation of kirchoffs law?

656






How much dc volt applied in cathodic protection system?

1850


54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?

1781


i have total 8 dg sets for synchronizing and 2 buscoupler,1 sectoin dg no 1,2,3,and 2 sectoin dg no 4,5,6,and last section dg no 7,8 ....if buscupler no 1 and 2 is off mode ..than dg no 1,2,3,will synchroniz of another dg sets?

1355


we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

1231


What type of wiring series or parallel is used for conventional and addressable type FAS & why?

1385


What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?

1940


What happens when ac supply is given as excitation voltage instead of dc supply

3147


wat is meant by PX class in ct?

1578


what is effect of length of air gap on performance of dc motor and generator?

1335


How relay works, reverse relay, master relay, os relay, earth fault relay and what is its setting point

1205