WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5

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WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF
COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SIZES??

Question Posted / vivek

14 Answers
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WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / prakash suhane

Rating of cable depend on various factors like
1) Size of cable
2) No.of cores
3) Type of Insulation
4) Laying in air/ underground
5) Multi strand or single strand

Is This Answer Correct ?

144 Yes

7 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / vignesh

Current rating shall be decided by

* load requirement
* Power factor
* Voltage rating

Is This Answer Correct ?

71 Yes

7 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / piyush rana

There is no any thumb rule, therer is a standard table from
which we can know the capacity of the cable.
The current carrying capacity is depend upon the size of
conductor(Cross sectional area)

Is This Answer Correct ?

71 Yes

13 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / hdn electrical

There is no 'rule of thumb'. The current carrying capacity
of a cable can vary greatly depending on the location and
installation method in which it is used.

The tables in BS 7671 will show optimum carrying capacities,
but will then be subject to de-rating factors such as
ambient temperature, grouping, how it's fixed in/on a wall
or if it will be covered by insulation.

If you are unsure you should contact a qualified electrician.

Is This Answer Correct ?

22 Yes

4 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / gurupirit singh

The current carrying capacity
of a cable can vary greatly depending on the location and
installation method in which it is used.And also depend on
insulstaion & cooper of wire.

Is This Answer Correct ?

11 Yes

0 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / hariom

There is no 'rule of thumb'. Every manufacture provide their cables current carrying Data.It is almostly Same as per ISI.The current carrying capacity
of a cable can vary greatly depending on the location and
installation method in which it is used.

Is This Answer Correct ?

6 Yes

2 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / simon

The rule of thumb for current carrying capacity of copper
wire is 6 amperes per square millimeter of cross-sectional
area for an insulated, uncooled conductor.

Therefore the following applies:
1.0mm 6A
1.5mm 9A
2.5mm 15A
6.0mm 36A

Note that with air cooling, such as within an electric motor
or generator, the current carry capacity of the conductor
may be as high as five times the figures above (up to
30A/mm2) but is dependent on the efficiency of the cooling.

Is This Answer Correct ?

27 Yes

31 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / ramprakash

answer 9&12 is currect

Is This Answer Correct ?

0 Yes

8 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / sonu

current carrying capacity of wire's of
2.5 sq.mm=29amp
4.0 sq.mm=37amp
6.0 sq.mm=48amp
10.0 sq.mm=66amp

Is This Answer Correct ?

28 Yes

38 No

WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SI..

Answer / arun kr. singh

The Thumb rule is:

Size of cable x 4 = Current rating of cable.

e.g rating of 2.5mmsq cable is: 2.5x4=10A
for 4mmsq cable is: 4x4=16A
6mmsq cable is: 6x4=24A
10mmsq cable is:10x4=40A

Is This Answer Correct ?

7 Yes

23 No

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