Single phase concentric aluminium cable-Kenya

Property

Cable sizes

Phase Conductor

Nominal area, mm，

10

16

25

35

Form of conductors

Circular/compacted circular stranded

No. & approx, dia. of wires, No./mm

7/1.35

7/1.70

7/2.14

7/2.52

Min-Max. dia of completed conductors, mm

*

4.6-5.2

5.6-6.5

6.6-7.6

Nominal diameter of conductors, mm

4.05

5.10

6.42

7.56

Minimum thickness of insulation mm

1.55

1.55

1.60

1.65

Concentric neutral Approx, no. of wires

7

11

14

16

Concentric neutral Approx, diameter of wires, mm

1.50

1.50

1.50

1.50

Minimum lay lengths, mm

146.5

155

165

178

Thickness of over sheath, mm

1.4

1.4

1.5

1.6

Minimum thickness of over sheath at any point

1.09

1.09

1.17

1.20

Maximum conductor DC resistance per 1000m of cableat 20°C

Phase, Ω

3.08

1.15

1.20

0.868

Neutral-earth, Ω

4.61

3.08

1.91

1.20

Maximum weight of the complete conductor excluding insulation

*

43.9

69.5

96.4

Power frequency withstand voltage, for 5mins, kVrms

3.5

Insulation resistance at 500Vdc in 1min at 20qC., MQ/Km

8

8

6

5

* Manufacturer to state the design value based on the sizes of conductors specified