subject:-EEE unit:- Electrical wiring

1. SUBJECT :-ELEMETS OF ELECTRICAL
ENGINEERING
TOPIC :- To study about types of wiring, cables,
Connectors and switches.
ENROLLMENT NO :- 141080107009
BRANCH :- CSE
AMIRAJ COLLEGE OF
ENGINEERING AND TECHNOLOGY

2. Cables
• “Several wires stranded together is known as a
Cables”.
OR
“Conductors covered with insulation are known as
Cables”.
It consists of three parts:-
1. The conductor and core.
2. The insulation or dielectric.
3. The protective covering.

3. Types of Cables
On basis of
conductors
• Single core cable
• Multi core cable
On basis of no. of
voltage grading
• 250/440 volt
cables
• 650/1100 volt
cables
On basis of
conductor used
• Copper
conductor cables
• Aluminium
conductor cables
On basis of insulation
1 VIR insulated Cables 5 Weather proof Cables
2 TRS/CTS Cables 6 Flexible Chord Cables
3 Lead sheathed Cables 7 XLPE Cables
4 PVC Cables

6. CONNECTORS
• “A conductive device used for connecting
electrical circuits by means of wires and
cables.”
• Wires and cables are connected using
permanent and temporary connections.
• Seperable connections are used when circuits
can be connected to other electrical
components.

7. Switches
• “An electromechanical device used to connect
or disconnect a circuit is known as Switch.”
• The moving part of a switch used to connect or
disconnect a circuit is called a Pole.
• If the contact of the switch alternatively
connects and disconnects a circuit, it is called a
Single Throw Type Switch.

9. Systems Of Wiring
1. Cleat Wiring
2. Wooden casing and capping Wiring.
3. C.T.S OR T.R.S Wiring.
4. Lead sheathed or metal sheathed Wiring.
5. Conduit Wiring.

10. Cleat Wiring
 Cleat wiring is normally used for temporary
wiring purposes.
 As a permanent system of wiring, it is not
preferred in domestic premises.
 It is quite suitable for taking a temporary
connection, such as for function, marriages,
etc.

12. o Advantages
1. It is the cheapest system of internal wiring.
2. Its installation and dismantlement is easy and quick.
o Disadvantages
1. It is not good looking.
2. It is quite temporary and perishes quickly.
o Field of Application
1. The wiring of this type is very suitable for
temporary installations in dry places.
2. This is also accepted where appearance is not so
important and cheapness is the main consideration.

13. Field of Application
1. The wiring of this type is very suitable for
temporary installations in dry places.
2. This is also accepted where appearance is not
so important and cheapness is the main
consideration.

14. Wooden Casing and Capping
Wiring
• This is one of cheapest types of wiring
and is commonly used for house wiring.
• The cable used in this
type of wiring is either
V.I.R or P.V.C or any
other approved insulated
cables

15. o Advantages
1. Better appearance than cleat wiring.
2. Cheap in cost.
3. Easy to install and rewire.
4. Easy to inspect by opening the capping.
o Disadvantages
1. Not suitable in damp places
2. Risk of fire
3. This type of wiring can be used only on surface and cannot be concealed
in plaster.
4. Since it requires better workmanship, labour cost is more.

16. Field of Application
• This type of wiring is suitable for low voltage
domestic installations in dry places and where
there is no risk of fire hazard.

17. C.T.S or T.R.S Wiring
• This type of wiring is also used for house
wiring and is quite cheap.
• Cab tyre sheathed wire or rubber sheathed wire
is normally used as conductor for this wiring.
• The wires are run on the teak wooden battens
which are fixed on the wall or the ceiling by
means of screws and wooden pluge.

19. o Advantages
1. It is easy to install and repair.
2. Its life is long.
3. It is cheaper then other types of wiring except cleat wiring.
4. Conductors have strong insulation.
o Disadvantages
1. The conductors are open and liable to mechanical injury, therefore,
this type of wiring cannot be used in workshops, etc
2. Good workmanship is required to make a sound job in T.R.S wiring.

20. Fields of Application
1. This type of wiring is suitable for low voltage
installations and is extensively used for
lighting purpose.
2. This type of wiring is suitable where acids
and alkalies are likely to be prescut.

21. Metal Sheathed Wiring
• This type of wiring is also adopted for low
voltage installation.
• This system is more or less similar to
C.T.S wiring except that the cable used is
different in this wiring system.
• In this system conductors used are
insulated with V.I.R and then covered with
an outer sheath of lead aluminium alloy
containing 95% lead and 5% aluminium.

23. o Advantages
1. Conductors are protected against mechanical injury.
2. It is suitably employed under damp situations.
3. It has longer life.
4. Conductors are protected against chemicals.
o Disadvantages
1. Cables are costlier then C.T.S or T.R.S wires.
2. In case of leakage, there is every risk of shock.
3. Skilled labour and proper supervision is required.

24. Fields of Application
1. This wiring system is suitable for low voltage
installations. It may be used in places
exposed to sun and rain provided no joint is
exposed.

25. Conduit Wiring
• Conduit wiring system is the best for domestic
and commercial installations.
• It provides proper protection to the installation
against fire hazards, shock, mechanical
damage and dampness.
• The cable used in this system is either V.I.R or
P.V.C insulated qand is run in mild steel or
P.V.C pipes called as conduits.

28. o Advantages
1. Conduit provides protection against mechanical injury and
fire.
2. Conduit provide protection against chemicals.
3. The whole system is water proof.
4. Conductors are safely secured from moisture.
o Disadvantages
1. It is costly system of wiring.
2. It requires more time for erection.
3. It requires highly skilled labour.

29. Fields of Application
1. As this system of wiring provided protection
against fire, mechanical injury and dampness,
this is the only approved system of wiring
for:
2. Damp situations
3. In workshops for lighting and motor wiring
4. Place where important documents are kept
such as a record room.