Electrical Installation
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Transcript Electrical Installation
Electrical Installation Drawings
Islam Al-Jarrah
state
the purpose of electrical installation
drawings.
differentiate
between installation/wiring
diagrams and circuit/schematic diagrams
identify
the symbols and terminology used in
installation and schematic diagrams.
implement
electrical installation drawings.
The ability to read and
understand schematics
and drawings is an
absolute must.
Electrical installation
drawings provide an
electrician with the
technical information
needed to install the
wiring system in
apartments or
buildings.
Installation or wiring
Diagrams
Does not show the functional
details of the electrical
installation
Schematic or Circuit
Diagram
show the functional details of
the electrical installation
interconnections
Installation & Wiring Diagram
It also identifies the wires by
wire numbers or color
coding.
Connection Line
Protective earth line
Distribution device
Junction box
Signal line
Lines Symbols
Safety devices Symbols
Number of wires/cable
Pushbutton
Lamp
Socket outlet, single
phase
lines
Safety and reliable devices
One gang one way
switch
One gang two way
switch
Two gang one way
switch
Intermediate switch
Switches Symbols
Switches Symbols
One light operated by
one switch
One gang one way switch
Two one way switches
in a single module
Two gang one way switch
One light operated by
two switches
One gang two way switch
Switch of 4 terminals
used to control device
from more than two
locations.
Intermediate switch
One
gang one
two way
one
way
Two
Socket
Intermediate
Lamp
Gang
switch
switch
Connection
line
switch
Lab Activity 1 –Page 11 – Module 3
Schematic diagrams show
the electrical systems, and
are used for understanding
the electrical functions of a
wiring system.
The schematic is a
representation of how the
circuit works.
the schematic shows the
logical order of how they are
used together.
Connection Line
Protective earth line
Signal Line
Line to indicate
component housing
Fixed Connection
Movable Connection
Terminal Connection
Strip
Junction box
Earth connection
MCB
Socket outlet, single
phase
Pushbutton
Electric fuse
Electric lamp
One gang one way
switch
Two gang one way
switch
One gang two way
switch
Intermediate switch
One gang one way
two pole switch
The Wiring Diagram Shows
that one lamp in this room is
operated by one switch
Wiring Diagram
In the schematic diagram each
individual connection line is
shown and more detailed
graphical symbols are used to
indicate the electrical details
of a wiring.
Schematic Diagram
The room has two doors so
the lamp is operated by two
switches
Wiring Diagram
More detailed graphical
symbols for the
interconnections
Schematic Diagram
Architectural plan
shown.
Architectural plan not
shown.
Does not show the
functional details of
the electrical
installation.
Details such as the
interconnection of
components like
switches, Junction
boxes, light fittings
etc. will be shown.
Wiring Diagram
Schematic Diagram
Lab Activity 2 & 3 – Page(12-13) – Module 3
Module Exercises – Page 14