Page 93 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

The bending radius of cable should be not less than six times the overall diameter of the cable. All cables taken
through the floor shall be enclosed in an insulated heavy gauge steel conduit extending 1.5- metre above the
floor. TRS cables shall not be buried directly in plaster, they may be taken in teak wood channel or conduit buried
in the wall
In case of additional circuits to be wired in the existing installation the increased cables are laid on new battens
laid in parallel to existing one.

Link clip and joint link clip
It is of 2 types
1 Link clip with separate linking eye
2 Link clip with combined linking eye

They are available in sizes of 25,32,40,50,63 and 80 mm. Out of which up to 40 mm clips have one hole while
above that have two holes for fixing. The thickness of link clip is 0.32 mm and are made of tin or brass or brass
coated tin or aluminium.

According to BIS link clips are packed in boxes at the rate of 100 clips per box. If linking eyes are separate part 5%
excess of linking clips are provided. One single clip shall not hold more than two twin core TRS or PVC sheathed
cable up to 1.5 square mm. Above this a single clip shall hold a single cable.

Advantages
1 Protection from dampness is excellent.

2 Semi skilled labours are required.
3 Less cost.
4 Very long life.

80

CITS : Power - Electrician & Wireman - Lesson 20-25