Armoured cable minimum bending radius
1. Cable minimum allowable bending radius, according to wire and cable manufacturing GB12706-2002 standard:
 
For single core cable:
No-armoured: cable minimum bending radius during installation: 20D; cable minimum bending radius near the connection box and terminal: 15D;
Armoured: cable minimum bending radius during installation: 15D;
cable minimum bending radius near the connection box and terminal: 12D;
 
For three core cable:
No-armoured: cable minimum bending radius during installation: 15D;
cable minimum bending radius near the connection box and terminal: 12D;
Armoured: cable minimum bending radius during installation: 12D;
cable minimum bending radius near the connection box and terminal: 10D;
Note: D is the outer diameter
 
2. Cable minimum allowable bending radius, according to wire and cable manufacturing GB9330-88 standard:
 
Unarmored cable: cable diameter should not be less than 6D;
 
Armoured or copper tape shielded cable: cable diameter should not be less than 12D;
 
Shielded flexible cable: not less than 6D.
Note: D is the outer diameter
 
3. Cable minimum allowable bending radius, according to wire and cable manufacturing GB50303-2002 standard:
 
Lead-free steel armoured sheath rubber insulated power cable: should not be less than 10D;
Steel armour sheath rubber insulated power cable: should not be less than 20D;
PVC insulated power cable: should not be less than 10D;
XLPE insulated power cable: should not be less than 15D;
Multi-core control cables: should not be less than 10D;
Note: D is the outer diameter
 
In GB / T 12706-2002, multi core armored cable minimum bending radius is 12D, and multi core non-armoured cable minimum bending radius is 15D;
in GB 9330-88, armoured control cable minimum bending radius is 12D, and non-armoured control cable minimum bending radius is 6D.
 
Armored cable bend radius should be not less than 20D;
Non-armored and steel wire armored cable bend radius should be not less than 15D.
 
The bending radius of the cable relate to the cable outer diameter and cable whether or not armoured. Different cable manufacturers of outer diameter are different, the armoured cable bending radius generally consider 8-10D. So the minimum bending radius of armouring cable is different, specific date can be asked your cable manufacturer.
 

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