1.
Making extension board
Extension board(electrical) is an
switch board with number of
switches and plugs used for
temporary electrical connections.
It is used for temporary electrical
connections of table fan, electric iron
, music systems etc.

2.
Aim
• Students will learn the making of extension
board with witches, plugs, fuse and indicator.
They will learn the electrical wiring with
practical use. They will also learn the
connection of fuse, indicator, switch, plug etc.
they will learn the relation between load and
current. Students will get the experience of
making practical science projects and the
concept of self-employment.

3.
Material used
• Switch board of 03 switches and 03 five pin 05
amp plugs, with 01 fuse and 01 indicator.
• 03 switches (5amp)
• 03 five pin plugs (5amp)
• 1mm copper wire one meter

4.
Materials required
• Tester
• Pliars
• Electric drill
• Wire cutter
• Multi meter

5.
Procedure
• First take a switch board and fix the switches
on it with the screw and tester.
• Fix the fuse and indicator
• Connect the switches , plugs, indicator, and
fuse as per circuit diagram with the help of
wire.
• Test the board with the help of multi meter.
• Connect the external wire for remote
connections.