Page 243 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

3 G Channel (Fig 19)
It is a zinc - coated metal channel which is especially used for mounting the feed through or spring load or double
deck terminal connectors without using screw inside the control panel.

4 Terminal connectors (Fig 20)
It is the set of insulated screw terminals at both sides used to connect the accessories of the control panel with
external control switches, limit switches, input supply and motor terminals etc.
Terminal connectors with barrier strips and clamping plates provide a tight and electrically sound termination. It
is available in various size, current and voltage ratings.

Fig 19 Fig 20

5 Wire ferrules (Fig 21)
It is a small circular ring made up of polymer plastics or rubber or fibre, used to easily identify the ends of wires
which are to be connected into a particular terminals or accessories. It should be inserted on the both ends of a
wire as collar or bracelet.
It is available is different size like 1 sq.mm, 1.5 sq.mm and 2.5 sq.mm etc generally in yellow colour printed with
either numerical or alphabet letters on it.
6 Lugs and thimbles (Fig 22)
It is a cylindrical barrel along with circular rings or cylindrical rod or U shape or flat surface made up of aluminum
or copper or brass, used to ensure the sound electric connection of the cable / wire on to the terminals. It prevent
flare out of stripped and stranded cable, increase the conductivity of the connection, support the cable / wire and
avoid the loose connection and sparking. Suitable crimping tool has to be used to connects them with cables /
wires. It is available in different size like 1 sq.mm, 4 sq.mm, 25 sq.mm, 70 sq.mm, 125 sq.mm and so on.

• Thimbles may also be referred as sockets.

Fig 21 Fig 22

7 Cable binding straps and button (Fig 23)
It is made up of PVC or polymer belt with a small holes at regular intervals, used to tie up, bunching, binding and
dressing the cable / wires with help of buttons.

It is reusable and good insulator to the heat and electricity. It is generally available 8mm, 10 mm and 12 mm
width.

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CITS : Power - Electrician & Wireman - Lesson 93-100 CITS : Power - Electrician & Wireman - Lesson 93-100