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Concentric and Split Concentric Cables-BS


Concentric and Split Concentric Cables used by distribution network operators when providing the final connection to domestic properties. Also suitable for sub main distribution and particularly used within high-rise buildings and street lighting systems.



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Aluminum or Copper Concentric and Split Concentric Cables

Application

Used by distribution network operators when providing the final connection to domestic properties. Also suitable for sub main distribution and particularly used within high-rise buildings and street lighting systems.

Standard

BS 7870

Construction

Type I Aluminum Concentric

Conductor : Class 1 solid aluminum conductor

Insulation: XLPE (Cross-Linked Polyethylene)

Concentric Conductor: Single layer of plain copper wires

Sheath: Black PVC (Polyvinyl Chloride)/Orange LSZH(Low Smoke Zero Halogen

PARAMETER

Type I Aluminum Concentric

NO. OF CORES

NOMINAL CROSS SECTIONAL AREA

mm2

NOMINAL OVERALL DIAMETER

mm

NOMINAL WEIGHT

kg/km

MAXIMUM DC RESISTANCE OF CONDUCTOR AT 20°C

ohms/km

MAXIMUM DC RESISTANCE OF CONCENTRIC CONDUCTOR AT 20°C

ohms/km

CURRENT CARRYING CAPACITY

Amps

 

 

 

 

 

 

 

In Air

 

Clipped Direct

 

Enclosed in Conduit on a Wall

1

25

13

300

1.2

1.3

127

119

105

1

35

14

390

0.868

0.91

158

147

128

3

25

23

650

1.2

1.3

97

90

84

3

35

25

820

0.868

0.91

120

112

103

Conductor Operating Temperature: 90°C Ambient Temperature: 30°C

Type II Aluminum Split Concentric

Conductor : Class 1 solid aluminum conductor

Insulation: XLPE (Cross-Linked Polyethylene)

Neutral Conductor: Plain copper wires covered

a blue polymeric compound

Earth Continuity Conductor:Plain copper wires

String Separator: Non-hygroscopic separator

Sheath: Black PVC (Polyvinyl Chloride)/Orange LSZH(Low Smoke Zero Halogen

Type II Aluminum Split Concentric PARAMETER

NO. OF CORES

NOMINAL CROSS SECTIONAL AREA

mm2

NOMINAL OVERALL DIAMETER

mm

NOMINAL WEIGHT

kg/km

MAXIMUM DC RESISTANCE OF AT 20°C

ohms/km

CURRENT CARRYING CAPACITY

Amps

 

 

 

 

CONDUCTOR

Neutral

Earth

 

In Air

 

Clipped Direct

 

Enclosed in Conduit on a Wall

1

25

15

490

1.2

1.2

1.2

127

119

105

1

35

16

610

0.868

0.76

1.2

158

147

128

3

25

23.5

830

1.2

1.2

1.2

97

90

84

3

35

26

1030

0.868

0.76

1.2

120

112

103

Conductor Operating Temperature: 90°C Ambient Temperature: 30°C

Type III Copper Concentric

Conductor:Class 2 stranded copper conductor

Insulation: XLPE (Cross-Linked Polyethylene)

Concentric Conductor: Single layer of plain copper wires

Sheath: Black PVC (Polyvinyl Chloride)/ LSZH(Low Smoke Zero Halogen

Type III Copper Concentric PARAMETER

NO. OF CORES

NOMINAL CROSS SECTIONAL AREA

mm2

NOMINAL OVERALL DIAMETER

mm

NOMINAL WEIGHT

kg/km

MAXIMUM DC RESISTANCE OF CONDUCTOR AT 20°C

ohms/km

MAXIMUM DC RESISTANCE OF CONCENTRIC CONDUCTOR AT 20°C

ohms/km

CURRENT CARRYING CAPACITY

Amps

 

 

 

 

 

 

 

In Air

 

Clipped Direct

 

Enclosed in Conduit on a Wall

1

4

8.5

140

4.61

4.8

42

41

37

1

16

12

370

1.15

1.2

100

99

88

1

25

14

550

0.727

0.76

135

130

117

Conductor Operating Temperature: 90°C Ambient Temperature: 30°C

Type IV Copper Split Concentric

Conductor : Class 2 stranded copper conductor

Insulation: XLPE (Cross-Linked Polyethylene)

Neutral Conductor: Plain copper wires covered

a blue polymeric compound

Earth Continuity Conductor:Plain copper wires

String Separator: Non-hygroscopic separator

Sheath: Black Black PVC (Polyvinyl Chloride)/

LSZH(Low Smoke Zero Halogen

Type IV Copper Split Concentric PARAMETER

NO. OF CORES

NOMINAL CROSS SECTIONAL AREA

mm2

NOMINAL OVERALL DIAMETER

mm

NOMINAL WEIGHT

kg/km

MAXIMUM DC RESISTANCE OF CONDUCTOR AT 20°C

ohms/km

CURRENT CARRYING CAPACITY

Amps

 

 

 

 

Metal-Coated Wires

Plain Wires

 

In Air

 

Clipped Direct

 

Enclosed in Conduit on a Wall

1

4

10

190

4.8

4.8

42

41

37

1

16

14

530

1.2

1.2

100

99

88

1

25

16

710

1.2

0.76

135

130

117

3

35

28.5

1900

0.76

0.55

129

120

110

Conductor Operating Temperature: 90°C Ambient Temperature: 30°C

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