This document provides information about electrical wiring diagrams and circuits. It defines two types of diagrams - pictorial diagrams, which show the physical appearance of circuit components, and schematic diagrams, which use standard symbols to show how components are connected regardless of physical placement. It also describes two basic circuit types - series circuits where components are connected end to end and parallel circuits where components are wired across the lines. Finally, it defines an electrical plan as a graphical layout of wiring connections for a building.

1. ELECTRICAL
WIRING DIAGRAM

2. OBJECTIVES
1. Identify two types of
electrical wiring
diagram and elctrical
circuit
2. Define electrical plan

4.  QUANTITY ELECTRICAL
FIXTURES
 ____________ Lamp outlets
 ____________ Duplex convenience
outlet
 ____________ Single gang
switches
 ____________ Two gang switch
 ____________ Three gang
switch

5. The flow of current in a
conductor or wire can be
represented by diagram.
There are
two types of diagram:
pictorial diagram and
schematic diagram.

6. A. Pictorial diagram is a
sketch of electrical circuit
that shows the external
appearance
of each component. It is much
like a photograph of the circuit
and uses simple images of
parts.

7. Pictorial diagram

8. Schematic diagram is a
sketch showing the
components of the circuit
using standard electrical
symbols. It shows the actual
number of components and how
the wiring is routed but not the
actual location.

9. Schematic diagram
Diagram A Diagram B
Sample schematic diagrams of one bulb
controlled by single pole switch using direct
current (Diagram A) and alternating current
(Diagram B) source.

10. C. Types of Circuit
 1. Series Circuit is a circuit in
which lamps are arranged in a
chain, so that the current has only
one path to take. The current is the
same through each load.
 Example of this is the Christmas
lights. It consists of a number of
bulbs that are
 connected side by side to meet the
voltage requirement which is 220
volts for alternating current.

11. Pictorial diagram of Christmas
light in series circuit

12. Schematic diagram of three bulbs
connected in series controlled by a
single
pole switch.

13. 2. Parallel Circuit
2. Parallel Circuit is a circuit in
which lamps are connected
across the wires. The voltage
across each load on parallel circuit
is the same. The advantage of
using parallel circuit is that even if
one of the lamps fails, still the
remaining lamps will function.

14. Pictorial diagram of two bulbs
connected in parallel circuit
controlled by a
single pole switch.

15. Schematic diagram of three bulbs
connected in parallel circuit
controlled by a single pole
switch.

16. 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, lightings, door
bells, and others to be installed.

18.  QUANTITY ELECTRICAL FIXTURES
 8 pieces Lamp outlets
 8 pieces Duplex convenience outlets
 4 pieces Single gang switches
 1 piece Two gang switch
 1 piece Three gang switch