The site plan layout drawing will drawn scale, smaller than the
actual size the building, find the actual measurement, you must
measure the distance the drawing and multiply the scale. The electrical equipment identified graphical symbol. 3. The
layout drawings site plans indicate the original intentions for the posi-
tion equipment, while the ‘as-fitted’ drawing indicates the actual posi-
tions equipment upon completion the contract. The wiring diagrams and installation
procedures for all these circuits can found later chapters.Sources technical information and communications
65
Site plans layout drawings
These are scale drawings based upon the architect’s site plan the build-
ing and show the position the electrical equipment which be
installed. The sitting room has a
two-way switch each door controlling the centre lighting point. There are also
three double sockets situated around the kitchen. 3.
The layout drawing site plan small domestic extension shown in
Fig. can seen that the mains intake position, probably consumer
unit, situated the storeroom which also contains one light controlled by
a switch the door. The kitchen has two doors and switch
is installed each door control the fluorescent luminaire.
Two double sockets and one switched socket are also installed the
sitting room. Some of
the more common electrical installation symbols are given Fig.
.
Try This
Drawing
The next time you are site ask your supervisor show you the site plans. The bathroom contains one lighting point controlled by
a one-way pull switch the door.
Ask him:
● how does the scale work
● put names the equipment represented British Standard symbols
As-fitted drawings
When the installation completed set drawings should produced
which indicate the final positions all the electrical equipment. The bedroom has two lighting points controlled independently
by two one-way switches the door. Two wall
lights with built-in switches are wired, one each side the window. the
building and electrical installation progresses, sometimes necessary
to modify the positions equipment indicated the layout drawing
because, for example, the position doorway has been changed.
For example, the site plan drawn scale 1:100, then 10mm the
site plan represents measured the building.2.
The standard symbols used the electrical contracting industry are those
recommended the British Standard 60617, Graphical Symbols for
Electrical Power, Telecommunications and Electronic Diagrams.1
