Laying Information
Minimum Bending Radius During Installation
During laying, the bending radius should not be smaller then values given below. The radius depends on the outer diameter (Do) of the cable.
1- Cables for Fixed wiring
Insulation
Conductor
Construction
Outer diameter
(mm)
Min.Radius
PVC

Aluminum or copper, solid circular or strand

Unarmoured

Up to 10
10 -25
Above 25

3 Do

4 Do

6 Do

Armoured
Any
6 Do
2-PVC and XLPE Insulated cables up to 3.6 kv
Conductor
Construction
Outer diameter
(mm)
Min.Radius

Solid aluminum or

stranded copper

Armoured or

Unarmoured

Any
8 Do

3- XLPE Insulated cables for 6.0 up to 30 kV

Type of

Cbale

Minimum Radius
During Laying

Adjacent to Joints Or

terminations

Single-Core

            - Unarmoured

          - Armoured

Three-core

              - Unarmoured

          - Armoured

20 Do

20 Do

 

15 Do

12 Do

15 Do

12 Do

 

12 Do

10 Do

Maximum Tensile Forces During Laying.

Maximum tensile force when pulling by cable
stocking:
F = A1 X 10 -------- 15 N/mm2
( cables with aluminium conductor.)
F = A1 X 10 m-- 20 N/mm2
( cables with copper conductor.)
But the maximum value value is 8500 N

Maximum tensile force when pulling by
eye attached to he conductors:
F = A1x 15 N/mm2
( cables with aluminium conductor.)
F = A1 x 15 N/mm2
( cables with copper conductor.)
But the maximum value is 20000 N Where A1 is Cable Cross Section mm2