Answer / satya prakash

At first do correct your spelling mistakes which indicates
that how much you are either inclined towards reading books
or chatting etc!
----------------------------
I am giving a detailed explanations of this. 1 Sq mm means
area of the conductor only. But it has its own insulation
thickness around it. If it is a sheathed/unsheathed cable
then accordingly it has nominal thickness of sheath added
and the overal max permissible dia of cable can be found
out. It has its detailed calculations. I am giving ex for 1
Sqmm Single Core Cable.
Unsheathed Cable: Nominal Conductor Area:-1 Sqmm, Nominal
Thickness of insulation:-THn=0.6mm, Max Overal Dia:- 2.7mm.
Max Current Carrying Cap:- 11A.
Soln:- Conductor Dia: PI*D*D/4 = 1
=>D= 1.128mm;
Overal Cable Dia= D+ 2*THn = (1.128+2*0.6)= 2.328. Now
10-15% of flexibility due to air inside the cable is added
with it which is equal to: 2.328+ 15% of 2.328= 2.6778 ~ 2.7mm.
Sheathed Cable: Nominal Conductor Area:-1 Sqmm, Nominal
Thickness of insulation:-THn=0.6mm, Nominal Thickness of
Sheath THSn=0.9,Max Overal Dia:- 4.8mm. Max Current Carrying
Cap:- 11A.(Same as unsheathed)
Soln:- Conductor Dia: PI*D*D/4 = 1
=>D= 1.128mm;
Overal Cable Dia= D+ 2*THn+ 2*THSn= (1.128+2*0.6+2*0.9)=
4.128. Now 10-15% of flexibility due to air inside the cable
is added with it which is equal to: 4.128+ 15% of 4.128=
4.7422 ~ 4.8mm.

Answer / k.prakashchandra

Please use Mozilla Firefox for asking questions to avoid
spelling mistakes

Answer / raju

Approx. 1 Amps only

Answer / dijesh

near about 7 amp.

Answer / dhanamjaya

5amps

what ll happen to current if two phases get short circuited

2 Answers   Kirloskar,

IN A HT CABLES i.e. 1.9/3/3 kv, what is the meaning of 1.9 and 3.3.

1 Answers  

What is the meaning of CT 400-200/1-1 A ?

2 Answers   Home,

Alternating voltage and current is which type of quantities?

1 Answers  

Why does an induction generator is preffered as compared to synchronous generator in especially a wind energy power production project?

0 Answers  

How to Calculate Contracted Maximum demand using motor Hp or Current

3 Answers  

how many voltage or current enough to kill a person?

12 Answers  

how cables go in and come out for distribution from the feeder pillar box?

0 Answers   CESC,

Why TAP changer provided in primary side of HT transformer ? and why not in secondary?

9 Answers   ABB, Reliance,

why voltage form factor of PT are increase , when it is ecpected heigher spikes in system. how it is calculated.

0 Answers   HAL,

How we can design a cable for a 3phase load.

1 Answers  

why use in & out Diesel line in dg set.

1 Answers   NHPC,