Parts, Types and Defects of Electric Circuit

1. Presented by:
MR. JHUNALVIN B. SANTOS
TLE 8 Teacher

2. Diagrams – graphic representation of a flow
or process.
Circuit diagrams are a visual way of
showing circuits. A circuit diagram (also
known as an electrical diagram, elementary
diagram, or schematic diagram) is a
simplified conventional graphical
representation of an electrical circuit.
An electrical circuit can be presented in two
different ways one is through a pictorial
diagram and the other is through a
diagram.

3. Pictorial Diagram is a sketch of
electrical circuit that shows the
external appearance of each
component.
Schematic Diagram is a sketch
showing the components of the circuit
circuit using standard electrical
symbols. It shows the actual number
of components, how the wiring is
routed but not the actual location.

4. Pictorial Diagram
(drawing/picture)

5. Schematic Diagram (symbols)

6. Schematic Diagram (symbols)

7. Activity
Draw the pictorial and schematic
diagram of the given circuit with
following required electrical
components: (5 points each)
1. Basic Circuit (with 1 bulb, 1 battery,
battery, wire connected and 1 SPST
switch)
2. Series Circuit (with 3 bulbs, 1
battery, wire connected and 1 SPST
switch)
(Write your answer in a 1/2 whole

8. Quiz
Direction: Classify the following if
if it is pictorial diagram or
schematic diagram. Write your
answer at the back of big
notebook.

9. 1

10. 2

11. 3

12. 4

13. 5

14. Presented by:
MR. JHUNALVIN B. SANTOS
TLE 8 Teacher

15. Electric Circuit – any arrangement of
electrical components that permit electricity
to flow.
The electric circuit can be defined as a
complete path where electricity flows from a
a source to the load and back again to the
source.

16. Parts of Basic Electrical Circuit
1. Source – this supplies electricity
needed in a circuit. Ex. battery, power
supply, AC outlet
2. Switch – controls the flow of current.
3. Wire or conductor – path of current.
(solid / stranded wire)
4. Load – it consumes, utilizes and makes
use of electricity. Ex. Appliances, gadgets
gadgets
5. Protective Device – This is a
protection of the entire circuit from short
circuit, overload or any other abnormal

17. Simple Circuit - is a wiring circuit which has
a single load, switch and a source that could
could be either direct current or alternating
current. This is the circuit used in lampshade
lampshade assembly.

18. Series Circuit – is a type of circuit wherein
loads or current consuming devices are
arranged like a chain, there is only one path,
path, and therefore the current is constant
or the same in any part of the circuit.

19. Parallel Circuit – the current flows in two or
more paths. Two or more components may
be connected across a single voltage source.
source.

20. Series - Parallel Combination Circuit
Serie
s
Serie
s
Paralle
l

21. ELECTRICAL CIRCUIT TERMS AND
DEFECTS
Closed Circuit – when the switch is in ON
position.

22. ELECTRICAL CIRCUIT TERMS AND
DEFECTS
Open Circuit – when the switch is in OFF
position. There is no current flow due to the
following reasons: broken wire, blown fuse,
defective switch.

23. ELECTRICAL CIRCUIT TERMS AND
DEFECTS
Open Circuit – when the switch is in OFF
position. There is no current flow due to the
following reasons: broken wire, blown fuse,
defective switch.

24. ELECTRICAL CIRCUIT TERMS AND
DEFECTS
Short Circuit – overloading due to wrong
connection of wire or conductor. This
condition happens if line 1 gets in contact
with line 2 wherein the current did not flow
along any load or current consuming device.
device. The result is excessive or high
current and high temperature that can cause
cause tripping off circuit breaker and blown
fuse.

25. ELECTRICAL CIRCUIT TERMS AND
DEFECTS
Short Circuit

26. ELECTRICAL CIRCUIT TERMS AND
DEFECTS
Grounded Circuit – this condition occurs
when the wire conductor accidentally gets in
in contact with a metallic object, you will
experience metallic shock if you touch the
metallic object.

27. QUIZ
I. Direction: Classify the following
following electrical circuit if it is
simple, series, parallel or series-
parallel combination.
Write the answer at the back of
your big notebook.

28. 1

29. 2

30. 3

31. 4

32. 5

33. II. Direction : Give the
following. Write the answer at
the back of big notebook.
1-4. 4 Parts/Components of
Electrical Circuit
5-7. 3 Types of Circuit
8-10. 3 Electrical Circuit
Defects/Terms

34. ANSWER KEY:
1-4. 4 Parts/Components of Electrical
Circuit
 Source, Switch, Load,
Wire/Conductor and Protective
Device
5-7. 3 Types of Circuit
 Simple, Series, Parallel, Series-
Parallel Combination
8-10. 3 Electrical Circuit
Defects/Terms
 Open, Closed, Shorted, Grounded

35. Presented by:
MR. JHUNALVIN B. SANTOS
TLE 8 Teacher

36. An electrical wiring plan is a detailed
drawing showing the location of different
components of the entire electrical system
of a given structure. It is a devised program
of action for electrician to follow that guides
him to the optimum or perfect way of doing
the installation.
Electrical plan is a graphical presentation of
electrical wiring connections to install in a
particular house or building. It indicates the
position of electrical fixtures such as
convenience outlets, switches, lightnings,
door bells, and others to be installed.

37. An electrical wiring plan must contain the
following:
Ceiling Plan
Electrical Layout
This shows the
location of the
service entrance,
kwh meter, main
safety switch,
power panel,
switches, lightning
outlets, and circuit
number.
Floor Plan Electrical
Layout
This shows the
location of the
service entrance,
kwh meter, main
safety switch, power
panel, convenience
outlets and circuit
number.

38. Dining Area and Living Room

39. Bedroom

40. Bathroom

41. Kitchen

42. Porch

43. Final Design of Typical Residential Wiring Plan

44. Ceiling Plan Electrical Layout

45. Ceiling Plan Electrical Layout

46. Quantity of Electrical Fixture