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

why generating voltages are of 11kv 33kv 22kv of 11 multiples

5 Answers  

---

In short transmission line,why does the receiving end voltage is less than sending end voltage?

4 Answers  

---

what sis the testing procedure of transformer and ht panel?

1 Answers  

---

why we used ZNO in Lightning arrester.

0 Answers  

---

is there any current and voltage drop on liquid resistance starter water/soda tank ?

0 Answers  

---

---

What is the difference between Type test and Routine test?

10 Answers  

---

i am going to correct power factor of 1600kw induction motor,when i calculate capacitance of capacitor it is three time more in star connection than delta. if motor is star connected which connection i shall adopt for capacitors and reason for adopt this connection

0 Answers  

---

what happens when a DC supply is given to AC motor?

9 Answers   Areva, ISMT,

---

how to calculate no. of earthing pits and their diamensions? no. of lightning arrester rods which are required to protect a building of 35 mtr and we calculate?

5 Answers   Dharampal Premchand Limited, FlowMore, Hindustan Zinc, Ispat, Maheshwary Ispat, NDDB, Siemens,

---

As Electricity Generates in MW I w'd like to know What are the factors we have to consider regarding the transmission of electricity from generation station to Public uses(230 V)

1 Answers  

---

Dear Sir, I willing to know if one 15Hp induction motor run in star connection. What happen power capacity of motor? Plz tell me.

1 Answers   Amtek Tekfor Automotive,

---

What is it mean Transformer 100/133MVA Power Transformer, significance of 100/133 MVA and 230/115KV please

3 Answers  

---