WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY OF A COPPER WIRE??

Categories >> Engineering >> Electrical Engineering
Suggest New Category

WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY
OF A COPPER WIRE?? 2.5, 4, 6MM SQUARE ETC...

Question Posted / vivek

5 Answers
13052 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY OF A COPPER WIRE?? 2.5, 4, 6MM SQUARE E..

Answer / uttam dutta

cURRENT CARRYING CAPACITY NOT ONLY DEPENDS ON THE CROSS
SECTION OF THE COPPER WIRE, IT ALSO GREATLY DEPENDS UPON
THE TYPE AND THICKNESS OF THE INSULATION, ONE MORE FACTOR
IS CORE OF THE CABLE, IE SINGLE CORE OR MULTICORE.
cONSIDERING ALL THIS FATORS STRICTLY IT CAN BE SAID 1 SQ.
MM COPPER CABLE CAN BEAR MAX.11 AMP SAFELY CONTENIOULY AND
2.R CAN BEAR 19 AMP . 4 SQ MM CAN BEAR 26 AMP. SOME TIME
THIS MAY VARY LITTLE DEPENDING UPON MAKE.

Is This Answer Correct ?

7 Yes

4 No

WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY OF A COPPER WIRE?? 2.5, 4, 6MM SQUARE E..

Answer / sonam

CURRENT DENSITY OF CU IS 1 AND AL IS 0.7.FROM HEREU CAN
FIND CURRENT CARRYINGCAPACITY IF U HAVE AREA

Is This Answer Correct ?

3 Yes

0 No

WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY OF A COPPER WIRE?? 2.5, 4, 6MM SQUARE E..

Answer / amro

depend the weathier out side the cabel
1- temperature
2- length of the cable
3-load factor
4- the cabel throw ( in air &duct & pipe &cabel tranch&
cabel leader inside the tranch)

for exampel:-
i= power/ volt* cos@
after that let used cabel 4 mm2
look in the catlog cabel and taking the rated current
oppset the wire

rated current *load factor*factor group*factor throw (in
air &duct & pipe &cabel tranch& cabel leader inside the
tranch )*factor temprature =current
1- if more then the load current ites ok
2- if less then the load current ites no must be chose the
big size cabel and again
calculate the equation and so an
after the calculate the voltge droop presentage must be
less the _+ 5 % from the main voltge

Is This Answer Correct ?

3 Yes

1 No

WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY OF A COPPER WIRE?? 2.5, 4, 6MM SQUARE E..

Answer / raju

in case copper wire we usually take 4(approximately) amps
per square mm

Is This Answer Correct ?

7 Yes

6 No

WHAT IS THE THUMBRULE FOR FINDING OUT THE CURRENT CAPICITY OF A COPPER WIRE?? 2.5, 4, 6MM SQUARE E..

Answer / ramesh kumar k

No.. No.. Mr. Raju... it is 2A/sq.mm atmost for safe
operation... other wise copper wire will burn out...

so the thumb rule is the current carrying capacity is
double that of area...

Is This Answer Correct ?

2 Yes

8 No

Post New Answer

More Electrical Engineering Interview Questions

For DG set,if the loading is increased,does flue gas temperature increases or not?

2 Answers NTPC,

What is the difference between generator and alternator?

2 Answers

why we use two slope(differential & restraining) in differential relay.but in busbar protection differential we are using only one slope?please explain

0 Answers ISRO,

how to varied the frequency in transmission line and how i kept it as a constant one?

2 Answers L&T,

Unit of Magnetic Flux Density a) Tesla b) weber c) Hendry d) Farad

3 Answers Ecil,

what is positive , negative & zero equivalent system resistance

0 Answers

I want the details about BHEL company examination.Can anyone able to help me please.

0 Answers

can a 12v dg starting battery(150 AH) be replace by 6 nos of 200AH batteries each of 2v connected in series.

3 Answers

Why CBCT rating is 50/1A

0 Answers

Why is water motor not taking the pressure? what is the problem?

0 Answers

a simple c++ program to calculate simple interst with its data members as private

0 Answers L&T,

what is mean by current? and voltage?

4 Answers

For more Electrical Engineering Interview Questions Click Here