Instrumentation Cables 
BS5308 Cable ESI Cable BS 6231 Cable DEF Standard Cable Italian standard AS/NZS 2373

Instrumentation Cables

600/1000V twisted pair control cables to AS/NZS 2373

 

Application

These cables are used in control, supervisory, protection and instrumentation circuits or used as pilot cables.

They commonly occur in power stations, substations or in industrial applications.

Standard

AS/NZS 2373

Rated voltage

600/1000V

Construction 

Conductor: Single wire plain annealed copper, complying with AS/NZS 1125.

Insulation: PE complying with AS/NZS 3808.

Lay-up: An adequate number of separate, identifiable lengths of lay of twisted pairs shall be used to

minimize crosstalk.

Fillers and Tapes: Fillers, binder and wrapping tapes shall be of suitable non-metallic materials. Collective

screen: Copper tape or aluminum (min. thickness of 0.07mm) or aluminum/polyester tape (min. thickness of

0.023)

Drain wire: Tinned copper consisting of seven wires of at least 0.25 mm nominal diameter for aluminum tape.

Armor (optional): Steel tape or steel wire complying with AS/NZS 5000.1

Sheath: PE, 4V-75 or HFS-75-TP complying with AS/NZS 3808.

Parameter

Nominal cross- sectional area of conductor (mm2)

Nominal diameter (mm)

Insulation thickness (mm)

 

Sheath thickness (mm)

Maximum d.c. resistance at 20oC (Ω/km)

 

0.64

 

0.90

 

0.8

10-pair

1.8

 

28.3

30-pair

1.9

50-pair

2.1

100-pair

2.4

 

1.0

 

1.13

 

0.8

10-pair

1.8

 

18.1

30-pair

2.0

50-pair

2.2

100-pair

2.5
1.27 1.27 0.8

10-pair

1.8

 14.3

30-pair

2.1 

50-pair

2.2

100-pair

2.6
1.5 1.38 0.8

10-pair

1.8

   12.1
     

30-pair

2.1
     

50-pair

2.2
     

100-pair

2.6

Other size could also be provided upon request.

Lay-up formation

Cable size

No. of pairs in centre and successive layers

Centre

1st

2nd

3rd

4th

5th

10-pair

2

8

-

-

-

-

30-pair

4

10

16

-

-

-

50-pair

3

9

16

22

-

-

100-pair

2

8

14

20

25

31

Color Code

When the twisted pairs in the cable are identified by colors, the color coding of the pairs  shall progress in

sequence from the center of the cable as given in the following table. alternatively, each pair may contain a

black and a white insulated core. One or both cores in each pair shall be numbered in a contrasting color. The

numbering of pairs shall progress in sequence from the center of the cable.

 

 

Centre or Layers

Insulation color

Pair 1

Pair 2

Pair 3

Pair 4

Pair 5

Pair 6

Last Pair

1-pair
center

Orange-
white

 

 

 

 

 

 

2-pair
center

Orange-
white

Violet-black

 

 

 

 

 

3-pair
center

Orange-
white

Red-grey

Violet-black

 

 

 

 

4-pair
center

Orange-
white

Red-grey

Blue-brown

Violet-black

 

 

 

Layers

Orange-
white

Red-grey

Blue-brown

Red-grey

Blue-brown

*

Violet-black

*Pair colors shall repeat from red-grey