This document discusses an internship presentation about Octel Cables, a manufacturer of cables in India. It describes the different types of cables Octel produces and where cables are used. It then explains the basic components of cables, including the conductor, insulator, and sheathing. The document outlines the five main steps in the cable manufacturing process: drawing thin copper wires, bunching them together, stranding insulated wires, extruding plastic insulation onto the wires, and finally cooling, coiling and packing the finished cables. It concludes with an overview of key cable testing methods.

1. ROLL NO:-21001004918
Internship
Training
by Gourav Tejaswi
presentation

2. CONTENT
table of
www.octelcables.com Page 01 of 16
INTERNSHIP PRESENTATION
about octelcabel
Types of cable
Cables
Manufacturing
basic principles
Testing

3. OctelcableS
www.octelcables.com
ABOUT IT
Introduction
OCTEL Cables is one of the renowned
manufacturers of cables in the Cable
Industry in India. Our range
encompasses a large variety of wires
& cables including Flexible Cables,
Control & Power Cables
(Unarmoured & Armoured),
Telephone Cables (Unarmoured &
Armoured), Submersible Cables,
Data Flow Cables, etc.
Page 02 of 16
Alfredo
Torres

4. www.octelcables.com
An electrical cable is an assembly of
one or more wires running side by
side or bundled, which is used to
carry electric current.
Electrical cables help transport
electrical energy from one point to
another.
Electrical cables find application in
almost every aspect of our day-to-
day life. Some of the places where
Electrical Cables are used Include:
• Homes
• Buildings
• Malls
• Tunnels
• Mines
• Metros Projects
• Airports
• Power Plants and Factories
• Ships
• Railways
• Construction Sites
What are cables? Basic Need?
Page 03 of 16

5. www.octelcables.com
Wire ampacityTable Page 04 of 16

6. www.octelcables.com
Page 05 of 16
CABLES COMPONENTS
OF A CABLE
Electric cables are usually made of
copper Because electricity moves well
in copper. Copper is not as expensive as
silver, making the work easier.
Sometimes aluminum is used in cable
making because it is cheaper than
copper. A cable is made when many
wires come together.
Components of cables are given
below:-
Conductor
Insulator
Sheathing
m o r e

7. www.octelcables.com
Components Page 06 of 16
Conductor
Conductor: The conducting part is used to
transmit electricity. Extensively used conductors
are copper and aluminum.
When an electric current is passed through a
conductor, the conductor becomes hot after some
time and produces heat.
heating effect produced by an electric current, I
through a conductor of resistance, R for a time, t is
given by H = I²Rt. This equation is called the Joule's
equation of electrical heating.PHOTOGRAPHER

8. www.octelcables.com
Page 07 of 16
Insulation materials resist
electrical leakage, prevent
the wire's current from
coming into contact with
other conductors, and
preserves the material
integrity of the wire by
protecting against
environmental threats such
as water and heat. Insulator
Insulators

9. www.octelcables.com
Page 08 of 16
It is yet another layer to give
protection to the wires from
chemical reactions with the
atmosphere. A common
material for the sheath is
PVC (polyvinyl chloride).
Sheathing

10. www.octelcables.com
STEPS
Manufacturing
Process
Step 4 Extrusion Step 4 cool & packing
Page 9 of 16
Step 1 Drawing Step 2 Bunching Step 3 StRanding

11. www.octelcables.com
Page 10 of 16
STEP 01
The first step in the process of
cable manufacturing is wire
drawing. Copper rods received
from the supplier are too thick for
usage in flexible wires so they will
have to be stripped down to the
required diameter. To do this, they
are pulled through a series of dies
of decreasing sizes. Copper wires
will emerge once the desired
diameter is reached. The wires
then go through an annealer
where they are refined to obtain
better electrical conductivity.
Drawing

12. www.octelcables.com
Page 11 of 16
STEP 02
The next step after drawing is wire
bunching. This is where the copper
wires are twisted together to form a
cable. The number of wires twisted
together determines the nominal
cross-sectional area of the cable.
Bunching a series of thin wires together
provides more flexibility than solid
wires of similar size.
Bunching

13. www.octelcables.com
Page 12 of 16
STEP 03
Stranding is basically similar to
bunching; the only difference here is
that stranding refers to the twisting of
insulated cables while bunching is
reserved for bare copper wires.
Stranding

14. www.octelcables.com
Page 13 of 16
STEP 04
The wire, now soft and flexible, is
passed through an extruder, where
the coating of plastic or other
insulating material is applied.
Materials are poured into the rear part
of the extruder, and are pushed
forward while heated into melt. Exiting
the extruder, the coated wire passes
through another cooling system and
is coiled on reels.
extrusion

15. www.octelcables.com
Page 14 of 16
STEP 05
The final manufacturing stage involves
coiling and cutting the cables to its
required packing length. The cables
can be packed onto drums or as
individual rolls, after which they are
wrapped, labelled and stored while
awaiting shipment.
cooling & packing

16. www.octelcables.com
Page 15 of 16
TESTING
Continuity Test High voltage test Insulation test

17. www.octelcables.com
Thank
you
Page 16 of 16