Answer / thowsif_emerson_csm team

Cable size is dependent upon the load(s) you wish to supply
power too. You have to know the maximum current you can be
expected to carry on a particular circuit BEFORE choosing a
cable.

Once you know the load, you need to choose a cable size
rated to carry at least that much current, preferably more
as a safety factor.

So if you are planning on running several electrical
devices with a combined current of 20 amps, you need a
cable sized to carry at least 20 amps, and slightly more.

To calculate the size of a power cable,pls refer the
following table LINK:-

http://www.electrician2.com/calculators/wireocpd_ver_1.html

Answer / sr

The factors involved in cable sizing are:
1. Voltage grade
2. Various Derating factors depending on cable laying
(direct in ground), ambient temperature considered, group
factors (all these data are available in cable catalogue)
3. Length of cable laying for calculating voltage drop.
Voltage drop shall generally be within a max. of 3%.

Answer / anand

Size of LT able depend upon
1. Load that cable is to carry. Generally, design load for
cable selection is appx 1.4-1.5 times theoretical load
2.Voltage drop while carrying current. Higher the size of
cable, lesser is voltage drop.

Size of HT cable is decided on the basis of load as well as
fault current it is supposed to carry during fault. Cable
hould be able to carry fault current till the tripping
circuits trips

Answer / rajeev

Hi Thowsif,


Gud Answer Yar..

Thanks a lot...

Answer / ahmed omer

to calculate the size of cable you have to follow the
following:-
FOR FEEDER
1- load rating
2- voltage rating
3- determine the full load current(IFL)
4- total deration factor to be found
5- determine the cable current carrying capacity=IFL/total
deration factor
6- above value to be comprise with the valu of current
carring capacity in the table of factory

Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?

1 Answers  

ELECTRICAL DRIVES: can a motor load system with passive load torque can have equilibrium speed in second quadrant

0 Answers  

Why ct secondary is not kept open while primary charged. Answer in terms of ct parameters.

4 Answers   Power Grid,

the winding of Generator and Motor is star or in delta ? and why

0 Answers  

what is kVA

6 Answers   TATA, Tata Motors,

There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 Answers  

how to calculate cable size by amp

19 Answers   CDS,

why occ characteristics of generator is also called as magnatization characteristics ?

0 Answers  

what is the function of open delta System?

1 Answers  

what is high - pot test. what's its use?????

0 Answers  

sir please tel me how calucalte kwh if home taken load 30ams how maney kwh taken per day.and 3phase motor 5hp per hars how maney load teken and how mach kwh and forward me to electrical table for calicalte kwh and kvr and kvah

1 Answers  

Why Motors are generally supplied with 3 core cables??? why not 4C??

5 Answers