How to counts a cable core according to its colour

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Core of cable having different colors
Different colours of core are used to counting the cores of a cable .
During wiring it is very important to  connect same feed to same core of cable for running a circuit in jb i.e juction box where cable  cores are terminated .
The numbering starts always from blue and it may be end at red .
There are many layers of cores of a cabel depend on types of a cable ,either it is 30 core cabel ,24 core cable  ,19 core cable or any other  types of cable .

In this figure  cable cores are terminated in bagho .
There are different types of cables as 30 core ,24 core ,19
core ,12 core ,6 core and 2core .
Uses :-  Cables are widely used in railway signalling It also used in electrical and telecome department for electric wiring 
For  telecome communication network generally quad cable or ofc are used .
This is the image of a 6 quad cable .
In every quad there are four core .It filled with jelly for stoping of water entering in side the cable .
cable cores
Colour codes are different which are blue,red ,grey,green,brown,black, yellow, yellow with red dots ,white ,pink and violet .
Note :-1 mm phase signal stand used for signal lamp,point operation and gate ckt .
0.06 mm phage signal stand is used for panel wiring and lamp
0.4 mm phage CU signal stand is used for lamp and panel. 16 stand 0.2 mm flexible wire is is used for q series relay wiring.
image of a cable drum

👉Colour code of 4 core cable
1-Blue, 2-Black, 3-Red, 4-yellow
👉 Colour code of a 12 core cable  1 blue ,2 to  9 grey , 10 blue, 11 red and 12 yellow .
 
👉 Thanks !  

https://assuredscienceclasses.blogspot.com/2020/09/colourcodeofresistor

 

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