Bending Radius Table
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www.keystone-cable.com
The cable bending radius is the minimum radius a cable can be bent without damaging it. The smaller the bending
radius, the greater the flexibility of the material. Knowing your cable's minimum bending radius will help prevent
damage during installation.
There are 4 factors which influence the minimum bending radius, including the cable insulated material, the cable
construction, the cable size and the cable's overall diameter.
To install the cables safely without damaging the electrical and physical properties of the cables, the tabulated
minimum bending radius must be observed.
Minimum Bending Radius
Type of Cable
Single-Core
PVC Insulated
Power Cables
Fire Resistant
Cables
D > 25 mm
10D
Voltage
D ≤ 25 mm
-
4D
-
6D
-
Multi-Core (Shaped Conductor)
12D
10D
-
Armoured (Circular Conductor)
10D
6D
-
Armoured (Shaped Conductor)
12D
8D
-
0.6/1kV
D ≤ 25 mm
6D
4D
-
D > 25 mm
10D
6D
-
D ≤ 25 mm
Multi-Core
D > 25 mm
Multi-Core (Shaped Conductor)
Armoured (Circular Conductor)
Armoured (Shaped Conductor)
Single-Core
Multi-Core
Armoured
Multi-Core
0.6/1kV
0.6/1kV
10D
4D
-
10D
6D
-
12D
10D
12D
10D
10D
12D
8D
6D
8D
6D
6D
8D
-
8D
4D
-
8D
4D
12D
8D
4D
12D
Multi-Ccore & Twisted Pair Screened
10D
6D
15D
Multi-Core (LiYY)
8D
6D
15D
Twisted Pairs (LIYY-TP)
8D
6D
15D
8D
6D
15D
8D
6D
15D
500V
10D
6D
-
500V
10D
6D
-
500V
10D(15D)
6D(12D)
-
Armoured (Solid conductor)
500V
12D(20D)
8D(15D)
-
Unarmoured
500V
10D
8D
-
Armoured
500V
12D
10D
-
Flexible(PVC,
Elastomer)
Twisted Pairs
Signal flexible
control cable
Multi-Core (LiYCY)
300/500V &
450/750V
250V &
300/500V
Multi-Core & Twisted Pairs (LiYCY-TP)
Thermocouple
6D
10D
D > 25 mm
Single & Multi-Core
Instrument Cable
4D
Occasional
Flexing
-
Fixed
10D
Multi-Core
Single-Core
XLPE Insulated
Power Cables
D ≤ 25 mm
During
Installation
6D
Description
Overall or Individual & Overall
Unarmoured
Overall or Individual & Overall
Armoured
Unarmoured (Solid conductor)
Bus Cable
Welding
Elastomer
0.6/1kV
-
6D
-
HDPE sheath
All type
-
25D
15D
-
Solar Cable
(PV1-F & H1Z2Z2-K)
XLPO
0.6/1kV &
1.0/1.0kV
8D
OD<12mm: 4D
OD>12mm: 6D
-
Note :
D is the cable overall Diam.
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