Page 25 - Electrician - TT (Volume 1)

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Fig 3 Fig 4

The handle of screwdrivers is either made of wood or cellulose acetate.
5 Neon tester BIS 5579 - 1985 (Fig 5)
It is specified with its working voltage range 100 to 250 volts but rated to 500 V.
It consists of a glass tube filled with neon gas, and electrodes at the ends. To limit the current within 300 micro-
amps at the maximum voltage, a high value resistance is connected in series with one of the electrodes.
6 Electrician’s knife (Double blade) (Fig 6)
The size of the knife is specified by its largest blade length eg. 50 mm, 75 mm.

It is used for skinning the insulation of cables and cleaning the wire surface. One of the blades which is sharp is
used for skinning the cable.

Fig 5 Fig 6

7 Hammer ball pein (Fig 7)
The size of the hammer is expressed in weight of the metal head. Eg.125 gms, 250 gms etc.
The hammer is made out of special steel and the striking face is tempered. Used for nailing, straightening, and
bending work. The handle is made of hard wood.
8 Try-square (Engineer’s square) (Fig 8) BIS 2103
This is specified by its blade length.
Eg. 50 mm x 35 mm
100 mm x 70 mm
150 mm x 100 mm etc.

Do not use it as a hammer.

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CITS : Power - Electrician & Wireman - Lesson 1- 4